Cisco MGX 8200 Series Edge Concentrators

Document ID: 22237

Contents

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
Background Information
Configure
      Basic
      Channel Associated Signaling
      On-Hook Detection
Command List
Verify
Troubleshoot
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Related Information

Introduction

This document provides configuration examples for structured data transport on the Circuit Emulation Service Module-8 (CESM-8) card.

Prerequisites

Requirements

Before attempting this configuration, ensure that you are knowledgeable of:

• Cisco CESM-8

• Cisco MGX 8220

• Cisco MC3810

Components Used

The information in this document is based on these software and hardware versions:

• MGX 8220/8250 firmware 4.1.x and later supports the CESM-8T1E1 card set

All configuration examples in this document are based on a CESM-8 card with this firmware/bootcode/hardware revision:

wss-mgxb.1.10.CESM.a > dspcd
  ModuleSlotNumber:          10
  FunctionModuleState:       Active
  FunctionModuleType:        CESM-8T1
  FunctionModuleSerialNum:   754950
  FunctionModuleHWRev:       aa
  FunctionModuleFWRev:        4.1.01
  FunctionModuleResetReason: Local DRAM parity reset
  LineModuleType:            LM-RJ48-8T1
  LineModuleState:           Present
  mibVersionNumber:          20
  configChangeTypeBitMap:    CardCnfChng, LineCnfChng
  cardIntegratedAlarm:       Clear
 
  fab number:                28-2199-02

The MC3810 multiservice access concentrator units used in the configuration examples as the customer premises equipment (CPE) devices are based on this software/hardware release level:

wss-3810e# show ver
Cisco Internetwork Operating System Software 
IOS (tm) MC3810 Software (MC3810-A2INR3V2-M), Version 11.3(1)MA62, EARLY DEPLOYMENT MAINTENANCE INTERIM SOFTWARE 
Copyright (c) 1986-1998 by cisco Systems, Inc.
Compiled Mon 26-Oct-98 19:35 by krunyan
Image text-base: 0x00023000, data-base: 0x0064BFDC

ROM: System Bootstrap, Version 11.3(1)MA1, MAINTENANCE INTERIM SOFTWARE
ROM: MC3810 Software (MC3810-WBOOT-M), Version 11.3(1)MA1,  MAINTENANCE INTERIM SOFTWARE 

wss-3810e uptime is 1 minute
System restarted by reload
System image file is "flash:mc3810-a2inr3v2-mz.113-1.MA62", booted via flash:

Cisco MC3810 (MPC860) processor (revision 06.06) with 27648K/5120K bytes of memory.
Processor board ID 08465557
PPC860 PowerQUICC, partnum 0x0000, version A03(0x0013)
Bridging software.
MC3810 SCB board (v04.K0)
1 Multiflex T1(slot 3) RJ45 interface(v01.K0)
1 Six-Slot Analog Voice Module (v03.K0)
1    Analog FXS voice interface (v03.K0) port 1/1
1    Analog FXS voice interface (v03.K0) port 1/2
1    Analog FXO voice interface (v03.K0) port 1/6
1 6-DSP(slot2) Voice Compression Module(v01.K0)
1 Ethernet/IEEE 802.3 interface(s)
4 Serial network interface(s)
1 Channelized T1/PRI port(s)
256K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (AMD29F016) 

Configuration register is 0x2102

wss-3810e#

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

For more information on document conventions, refer to the Cisco Technical Tips Conventions.

Background Information

The CESM-8 card offers a 100 percent port density increase over the CESM-4 card, as well as various clocking and framing functional enhancements. The CESM-4 card supports only T1/E1 basic unstructured service with synchronous clocking. The CESM-8 provides both basic unstructured service and basic/CAS structured service.

This document explores only the structured structured service features of the Circuit Emulation Service Module-8 (CESM-8) card—n * digital signal level 0s (DS0s) transport, channel associated signaling (CAS), and on-hook detection.

• The ATM Forum

  af-vtoa-0078.000—Circuit Emulation Service Interoperability Specification Version 2.0 (January 1997)

• International Telecommunication Union (ITU)

  ITU-T I.363.1—BISDN ATM Adaptation Layer specification: Type 1 AAL (August 1996)

Configure

The CESM-8 supports both T1 and E1 lines. Both line types are configured using the same set of commands.

• Lines are the first entity to be configured on the card.

• Next, logical ports are configured and associated with the active lines. These ports define a range of digital signal level 0s (DS0s) to use on the card and the type of CES to use (structured or unstructured).

• Finally, channels are created for each port to route the data through the ATM network.

This section describes these configurations:

• Basic

• Channel Associated Signaling

• On-Hook Detection

Note: To find additional information on the commands used in this document, use the Command Lookup Tool ( registered customers only) .

Basic

In this configuration example, we connect the MC3810 units WSS-3810E and WSS-3810F via the MultiFlex Trunk (MFT) modules (Controller T1 0/Serial 2) using HDLC as the Layer 2 protocol. Each MFT connects into line 5 on their respective CESM cards. However, we dedicate only three DS0s from the T1 to the HDLC connection. All devices in the test network derive their timing from the internal oscillator on WSS-BPXC.

This example uses this network diagram:

1. CESM—Build Lines

   The first step in building the connection is to bring up the lines on the two CESM cards. The line configuration covers the physical layer parameters for the associated T1/E1 line.

   MGX-B

   wss-mgxb.1.10.CESM.a > addln 5 wss-mgxb.1.10.CESM.a > dsplns Line Conn Type Status/Coding Length XmtClock Alarm Stats Type Source Alarm ---- ----- ------------ ------ -------- ------------- -------- ----- ----- 10.1 RJ-48 dsx1ESF Dis/dsx1B8ZS 0-131 ft LocalTim 10.2 RJ-48 dsx1ESF Dis/dsx1B8ZS 0-131 ft LocalTim 10.3 RJ-48 dsx1ESF Dis/dsx1B8ZS 0-131 ft LocalTim 10.4 RJ-48 dsx1ESF Dis/dsx1B8ZS 0-131 ft LocalTim 10.5 RJ-48 dsx1ESF Ena/dsx1B8ZS 0-131 ft LocalTim No No 10.6 RJ-48 dsx1ESF Dis/dsx1B8ZS 0-131 ft LocalTim 10.7 RJ-48 dsx1ESF Dis/dsx1B8ZS 0-131 ft LocalTim 10.8 RJ-48 dsx1ESF Dis/dsx1B8ZS 0-131 ft LocalTim wss-mgxb.1.10.CESM.a > dspln 5 LineNum: 5 LineConnectorType: RJ-48 LineEnable: Enabled LineType: dsx1ESF LineCoding: dsx1B8ZS LineLength: 0-131 ft LineXmtClockSource: LocalTiming LineLoopbackCommand: NoLoop LineSendCode: NoCode LineUsedTimeslotsBitMap: 0x0 LineLoopbackCodeDetection: codeDetectDisabled

   MGX-C
   wss-mgxc.1.10.CESM.a > addln 5

2. CESM—Configure Ports

   Next, we add the logical ports. Ports provide a logical grouping for a series of DS0s on a particular line and define the CES mode. Structured service allows encompassing any sequential series of DS0s on the line. You are not limited to one logical port associated with each line, but two logical ports cannot both use the same DS0s on a line.

   MGX-B

   wss-mgxb.1.10.CESM.a > addport 59 5 9 3 1 wss-mgxb.1.10.CESM.a > dspports Port Ena/Speed Type ------ --- ------ -------- 10.5.59 Add/ 192k structur Number of ports: 1 PortDs0UsedLine1: 0x00000000 PortDs0UsedLine2: 0x00000000 PortDs0UsedLine3: 0x00000000 PortDs0UsedLine4: 0x00000000 PortDs0UsedLine5: 0x00000700 PortDs0UsedLine6: 0x00000000 PortDs0UsedLine7: 0x00000000 PortDs0UsedLine8: 0x00000000 PortNumNextAvailable: 10 wss-mgxb.1.10.CESM.a > dspport 59 SlotNum: 10 PortLineNum: 5 PortNum: 59 PortRowStatus: Add PortNumOfSlots: 3 PortDs0ConfigBitMap(1stDS0): 0x700(9) PortSpeed: 192kbps PortType: structured PortState: Active

   MGX-C
   wss-mgxc.1.10.CESM.a > addport 56 5 6 3 1

3. CESM—Add Channels

   The logical channel controls the ATM side parameters for the connection. You link one logical channel to one logical port. Below, we configure the ports for basic service. The HDLC frames traversing the link do not require CAS signaling. As we will see later, configuring the line for CAS reduces bandwidth on the link. We also set the conditioning criteria to send all 1s if the channel experiences cell loss. We then configure the channel buffer size, CDVT, and clocking values.

   MGX-B

   wss-mgxb.1.10.CESM.a > addchan 159 59 1 0 255 15 wss-mgxb.1.10.CESM.a > cnfchan 159 1000 1000 0 1 1 1 wss-mgxb.1.10.CESM.a > dspchans Channel ChanNum Status CDV MaxBufSize CLIP CBRservice ------------ ------- ------ ----- ---------- ------ ------------ 10.5.59.159 159 Mod 1000 384 1000 structured wss-mgxb.1.10.CESM.a > dspchan 159 ChanNum: 159 ChanRowStatus: Mod ChanLineNum: 5 ChanMapVpi: 10 ChanMapVci: 159 ChanCBRService: structured ChanClockMode: Synchronous ChanCAS: Basic ChanPartialFill: 47 ChanMaxBufSize: 384 bytes ChanCDV: 1000 micro seconds C L I P: 1000 milliseconds ChanLocalRemoteLpbkState: Disabled ChanTestType: TestOff ChanTestState: NotInProgress ChanRTDresult: 65535 ms ChanPortNum 59 ChanConnType PVC ISDetType DetectionDisabled CondData 255 CondSignalling 15 ExtISTrig DisableIdleSupression ISIntgnPeriod 4095 seconds ISSignallingCode 0 OnHookCode 1

   MGX-C
   wss-mgxc.1.10.CESM.a > addchan 156 56 1 0 255 15 wss-mgxc.1.10.CESM.a > cnfchan 156 1000 1000 0 1 1 1

4. CESM—Examine Channel Statistics

   Looking at the channel statistics at this stage of the configuration, we see some definite problems. The associated channel on each card appears to be sending cells into the network, but neither channel reports receiving any cells, which results in the alarm condition for the channel state. This is happening because we have not built the PVC to transport the AAL1 cells from the local CESM card to the remote CESM card.

   MGX-B

   wss-mgxb.1.10.CESM.a > clrchancnts wss-mgxb.1.10.CESM.a > clrsarcnts wss-mgxb.1.10.CESM.a > dspchancnt 159 ChanNum: 159 Chan State: alarm Chan RCV ATM State: Normal Chan XMT ATM State: Normal Cell Loss Status: Cell Loss Reassembled Cells: 0 Generated Cells: 4802 Header Errors: 0 Seqence Mismatches : 0 Lost Cells: 0 Channel Uptime (secs.) 46 Signalling Status Offhook wss-mgxb.1.10.CESM.a > dspsarcnt 159 SarShelfNum: 1 SarSlotNum: 10 SarChanNum: 159 Tx Rx --------------- --------------- Total Cells: 9717 0 Total CellsCLP: 0 0 Total CellsAIS: 0 0 Total CellsFERF: 0 0 Total CellsEnd2EndLpBk: 0 0 Total CellsSegmentLpBk: 0 0 RcvCellsDiscOAM: 0

5. BPX—Add CBR Connection

   In order to carry the cells from one CESM to the other, there needs to be a CBR connection from the BXM trunk cards off of which each MGX shelf hangs. Because this PVC will carry an n * DS0 structured stream without partial fill, we configure the cell rate as 512 cells per second.

   { [8000 * N] / 46.875} = 512 cells/sec, where N = 3 and {x} means smallest integer >= to x.

   BPX-B
   wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 13:53 EST BPX 8600 Interface Shelf Information Trunk Name Type Part ICtrl Id Alarm 3.1 wss-mgxb AXIS - - MIN Last Command: dspnode

   BPX-C
   wss-bpxc TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 13:54 EST BPX 8600 Interface Shelf Information Trunk Name Type Part ICtrl Id Alarm 10.1 wss-mgxc AXIS - - MIN Last Command: dspnode

   BPX-B

   wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 13:59 EST Local Remote Remote Route Channel NodeName Channel State Type Avoid COS O 3.1.10.159 wss-bpxc 10.1.10.156 Ok cbr 0 L Last Command: addcon 3.1.10.159 wss-bpxc 10.1.10.156 cbr 512 * 1000 * Y ------------------------------------------------------------------ wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 13:59 EST Conn: 3.1.10.159 wss-bpxc 10.1.10.156 cbr Status:OK PCR(0+1) % Util CDVT(0+1) Policing 512/512 100/100 1000/1000 4/4 Owner: LOCAL Restriction: NONE COS: 0 Trunk Cell Routing Restrict: Y Path: wss-bpxb 1.1-- 1.1wss-bpxc Pref: Not Configured wss-bpxb BXM : OK wss-bpxc BXM : OK Line 3.1 : OK Line 10.1 : OK OAM Cell RX: Clear NNI : OK NNI : OK Conn: 3.1.10.159 wss-bpxc 10.1.10.156 cbr Status:OK PCR(0+1) % Util CDVT(0+1) Policing 512/512 100/100 1000/1000 4 Trunk Cell Routing Restrict: Y This Command: dspcon 3.1.10.159

6. CESM—Monitor Connection Statistics

   Now the channel counters on the CESM card indicate much improvement. Notice that the connections are not in alarm, and that the cells in and out are, for all intents and purposes, the same.

   MGX-B

   wss-mgxb.1.10.CESM.a > clrchancnts wss-mgxb.1.10.CESM.a > clrsarcnts wss-mgxb.1.10.CESM.a > dspchancnt 159 ChanNum: 159 Chan State: okay Chan RCV ATM State: Normal Chan XMT ATM State: Normal Cell Loss Status: No Cell Loss Reassembled Cells: 5094 Generated Cells: 5094 Header Errors: 0 Seqence Mismatches : 0 Lost Cells: 0 Channel Uptime (secs.) 1105 Signalling Status Offhook wss-mgxb.1.10.CESM.a > dspsarcnt 159 SarShelfNum: 1 SarSlotNum: 10 SarChanNum: 159 Tx Rx --------------- --------------- Total Cells: 8524 8524 Total CellsCLP: 0 0 Total CellsAIS: 0 0 Total CellsFERF: 0 0 Total CellsEnd2EndLpBk: 0 0 Total CellsSegmentLpBk: 0 0 RcvCellsDiscOAM: 0

7. BPX—Monitor Connection Statistics

   Again, the key point to notice in this output is that the cells port-to-net and net-to-port are the same. If you ever see the "Avg CPS" above the PCR for the connection, the "%util" above 100, or any of the "dscd" counters clocking up, you probably have not calculated the correct PCR for the data stream.

   BPX-B

   wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 14:00 EST Channel Statistics for 3.1.10.159 Cleared: Nov. 18 1998 14:00 (/) Snapshot PCR: 512/512 cps Collection Time: 0 day(s) 00:00:15 Corrupted: NO Traffic Cells CLP Avg CPS %util Chan Stat Addr: 31132770 From Port : 7818 0 511 99 To Network : 7818 --- 511 99 From Network: 7818 0 511 99 To Port : 7818 0 511 99 Rx Frames Rcv : 0 NonCmplnt Dscd: 0 Rx Q Depth : 0 Tx Q Depth : 0 Rx CLP0 : 7818 Rx Nw CLP0 : 7818 Igr VSVD ACR : 0 Egr VSVD ACR : 0 Tx Clp 0 : 7818 Rx Clp 0+1 : 7818 Tx Clp 0 Dscd : 0 Tx Clp 1 Dscd : 0 Tx Clp0+1 Dscd: 0 Last Command: dspchstats 3.1.10.159 1

8. Verify Clocking

   With a structured service, synchronous clocking is our only clocking scheme option. Because we possibly have individual DS0s from various sources muxed into one T1/E1 stream at the far end, it is not possible rely on the assumptions driving the implementations of the SRTS or Adaptive clocking found with the unstructured service.

   The clocking arrangement in this example has all units tracing their clock to the internal oscillator on WSS-BPXC. Since BPXC is the highest routing node in the network, BPXB automatically takes its clock from BPXC. Each MGX shelf is configured to time its bus inband from its BNM card. The lines on both CESM cards are locally timed. And, each MC3810 is configured to time its internal bus using the recovered clock from the MFT. The MFTs do not show any clock slips, so timing looks good end-to-end (and we chose the MC3810s because they are very particular about timing).

   BPX-B
   wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 14:03 EST Current Clock Source Source Node: wss-bpxc Source Line: Internal (CC) Clock Type: Clock Frequency: 1544000 Path to Source: wss-bpxb 1.1--wss-bpxc Last Command: dspcurclk

   MGX-B
   wss-mgxb.1.3.ASC.a > dspclksrc PrimaryClockSource: Inband from BNM SecondaryClockSource: Internal Oscillator CurrentClockSource: Primary ClockSwitchState: NoChange ExtClkPresent: Not Present ExtClkSrcImpedance: 100 ohms ExtClkConnectorType: DB-15

   MGX-C
   wss-mgxc.1.4.ASC.a > dspclksrc PrimaryClockSource: Inband from BNM SecondaryClockSource: Internal Oscillator CurrentClockSource: Primary ClockSwitchState: NoChange ExtClkPresent: Not Present ExtClkSrcImpedance: 75 ohms ExtClkConnectorType: BNC

   3810-E

   wss-3810e# show network-clocks Priority 1 clock source(desired config): T1 0 Priority 1 clock source(run-time config): T1 0 Clock switch delay: 10 Clock restore delay: 10 T1 0 is clocking system bus for 117 seconds. Run Priority Queue: controller0, wss-3810e# show cont t1 0 T1 0 is up. No alarms detected. Slot 3 CSU Serial #08464190 Model TEB HWVersion 4.70 Framing is ESF, Line Code is B8ZS, Clock Source is Line. Data in current interval (8 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

   3810-F

   wss-3810f# show network-clocks Priority 1 clock source(desired config): T1 0 Priority 1 clock source(run-time config): T1 0 Clock switch delay: 10 Clock restore delay: 10 T1 0 is clocking system bus for 132 seconds. Run Priority Queue: controller0, wss-3810f# show cont t1 0 T1 0 is up. No alarms detected. Slot 3 CSU Serial #08104198 Model TEB HWVersion 4.70 Framing is ESF, Line Code is B8ZS, Clock Source is Line. Data in current interval (19 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

9. MC3810 Configurations

   The relevant portions of the 3810 configuration files are included below.

   Note: Controller T1 0 is the MFT and ties into the Serial 2 interface on the box. The default clock source on the T1 controllers is Line.

   3810-E
   wss-3810e# wr t Building configuration... Current configuration: ! version 11.3 ! hostname wss-3810e ! network-clock-select 1 T1 0 ! controller T1 0 framing esf linecode b8zs channel-group 1 timeslots 9-11 speed 64 ! interface Serial2 ip address 10.98.199.1 255.255.255.0 ! voice-port 1/1 voice-port 1/2 voice-port 1/6 ! end

   3810-F
   wss-3810f# wr t Building configuration... Current configuration: ! version 11.3 ! hostname wss-3810f ! network-clock-select 1 T1 0 ! controller T1 0 framing esf linecode b8zs channel-group 1 timeslots 6-8 speed 64 ! interface Serial2 ip address 10.98.199.2 255.255.255.0 ! voice-port 1/1 voice-port 1/2 voice-port 1/6 ! end

Channel Associated Signaling

One of the major concerns with an N*DS0 service is how to pass channel associated signaling (CAS). With the unstructured service, this concern is not an issue. The CAS bits are identified based on offsets from the line framing structure. Because all the bits are sent in order with the unstructured service, the relative positions do not change. With a structured service, we have the possibility of muxing DS0s from various inputs to one output. The framing on a T1/E1 stream is controlled by the transmitter. Thus, without special provisions, it is very unlikely that the CAS bits on ingress to the CES interface would make it out in the correct position on egress.

Structured circuit emulation gets around this problem by removing the CAS bits on ingress, passing them along with the data bits in the AAL1 frame and re-inserting them into the T1/E1 stream on egress. Obviously, this requires slightly more overhead than does the Structured-Basic service.

In this example, we configure the 3810 MFTs to put one timeslot in a voice group. We will carry this DSO and its associated signaling across the network. With some other slight modifications to the configuration used in the Structured-Basic example, analog phones connected to the FXS ports on the 3810 units will be able to place calls across this CES connection.

1. CESM—Add CAS Port/Channel for Voice DS0

   MGX-B
   wss-mgxb.1.10.CESM.a > addport 53 5 3 1 1 wss-mgxb.1.10.CESM.a > addchan 153 53 4 0 0 0 ERR: cesCAS mismatch with existing channel on the line. requested channel = 153 existing channel = 159 Set failed due to illegal parameter(s)

   The addchan chan_num port_num cesCAS_sig_type partial_fill cond_data cond_signaling command syntax is:

   • chan_num—In the range from 32 to 279.

   • port_num—In the range from 1 to 192 for T1, and from 1 to 248 for E1.

   • cesCAS_sig_type—1 = basic, 2 = e1Cas, 3 = ds1SfCas, or 4 = ds1EsfCas.

   • partial_fill—0 = fully filled, in the range from 20 to 47 = E1 structured, in the range from 25 to 47 = T1 structured, or in the range from 33 to 47 = T1/E1 unstructured.

   • cond_data—255 = UDT, in the range from 0 to 255 = SDT.

   • cond_signaling—In the range from 0 to 15.

   The error can be caused by:

   • Illegal/invalid parameters

   • Channel already exists

   • Port may not be up

   What happened? It appears that we can not define one channel on a line for Structured-CAS and one channel for Structured-Basic. This means that we have to delete the existing Basic channels and re-add them in as CAS along with the new CAS channels:

   wss-mgxb.1.10.CESM.a > delchan 159
   wss-mgxb.1.10.CESM.a > addchan 153 53 4 4 0 0 0
   wss-mgxb.1.10.CESM.a > addchan 159 59 4 0 255 15
   wss-mgxb.1.10.CESM.a > cnfchan 153 1000 1000 0 1 1 1
   wss-mgxb.1.10.CESM.a > cnfchan 159 1000 1000 0 1 1 1
   

   MGX-C
   wss-mgxc.1.10.CESM.a > addport 54 5 4 1 1 wss-mgxc.1.10.CESM.a > delchan 156 wss-mgxc.1.10.CESM.a > addchan 154 54 4 0 0 0 wss-mgxc.1.10.CESM.a > addchan 156 56 4 0 255 15 wss-mgxc.1.10.CESM.a > cnfchan 154 1000 1000 0 1 1 1 wss-mgxc.1.10.CESM.a > cnfchan 156 1000 1000 0 1 1 1

2. CESM—Verify Current Configuration

   MGX-B

   wss-mgxb.1.10.CESM.a > dspports Port Ena/Speed Type ------ --- ------ -------- 10.5.53 Add/ 64k structur 10.5.59 Add/ 192k structur Number of ports: 2 PortDs0UsedLine1: 0x00000000 PortDs0UsedLine2: 0x00000000 PortDs0UsedLine3: 0x00000000 PortDs0UsedLine4: 0x00000000 PortDs0UsedLine5: 0x00000704 PortDs0UsedLine6: 0x00000000 PortDs0UsedLine7: 0x00000000 PortDs0UsedLine8: 0x00000000 PortNumNextAvailable: 19 wss-mgxb.1.10.CESM.a > dspchans Channel ChanNum Status CDV MaxBufSize CLIP CBRservice ------------ ------- ------ ----- ---------- ------ ------------ 10.5.53.153 153 Mod 1000 384 1000 structured 10.5.59.159 159 Mod 1000 384 1000 structured wss-mgxb.1.10.CESM.a > dspchan 153 ChanNum: 153 ChanRowStatus: Mod ChanLineNum: 5 ChanMapVpi: 10 ChanMapVci: 153 ChanCBRService: structured ChanClockMode: Synchronous ChanCAS: DS1 ESF ChanPartialFill: 47 ChanMaxBufSize: 384 bytes ChanCDV: 1000 micro seconds C L I P: 1000 milliseconds ChanLocalRemoteLpbkState: Disabled ChanTestType: TestOff ChanTestState: NotInProgress ChanRTDresult: 65535 ms ChanPortNum 53 ChanConnType PVC ISDetType DetectionDisabled CondData 0 CondSignalling 0 ExtISTrig DisableIdleSupression ISIntgnPeriod 4095 seconds ISSignallingCode 0 OnHookCode 1 ChanNumNextAvailable: 33

3. MC3810—Add Voice Group and Dial Peers

   We had to make some adjustments to the channel-group on the 3810 units in order to support the new CAS arrangement. Because the CESM card will not allow us to mix Structured-Basic and Structured-CAS channels on the same line, we had to make all channels Structured-CAS. This change implies that we can no longer reliably pass 64kbps through each DS0, so must reconfigure the channel-group lines to 56kbps.

   The default speed for a channel-group DS0 is 56kbps. Thus, that parameter will not display in the configuration. We include it here for display purposes.

   Changes are in boldface type in the output:

   3810-E

   wss-3810e# wr t Building configuration... Current configuration: ! version 11.3 ! hostname wss-3810e ! network-clock-select 1 T1 0 ! controller T1 0 framing esf linecode b8zs channel-group 1 timeslots 9-11 speed 56 mode cas voice-group 0 timeslots 3 type e&m-immediate ! interface Serial2 ip address 10.98.199.1 255.255.255.0 ! voice-port 0/3 ! voice-port 1/1 voice-port 1/2 voice-port 1/6 ! dial-peer voice 60000 pots destination-pattern 6 port 0/3 ! dial-peer voice 7777 pots destination-pattern 7777 port 1/2 ! end

   3810-F

   wss-3810f# wr t Building configuration... Current configuration: ! version 11.3 ! hostname wss-3810f ! network-clock-select 1 T1 0 ! controller T1 0 framing esf linecode b8zs channel-group 1 timeslots 6-8 speed 56 mode cas voice-group 0 timeslots 4 type e&m-immediate ! interface Serial2 ip address 10.98.199.2 255.255.255.0 ! voice-port 0/4 ! voice-port 1/1 voice-port 1/2 voice-port 1/6 ! dial-peer voice 50000 pots destination-pattern 5 port 0/4 ! dial-peer voice 8888 pots destination-pattern 8888 port 1/2 ! end

4. BPX—Verify HDLC PVC Operation

   Before adding the CBR PVC for the voice channel, let's look at the existing PVC for the HDLC connection. Notice the impact caused by changing the channel type from Structured-Basic to Structured-CAS.

   BPX-B

   wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 14:21 EST Channel Statistics for 3.1.10.159 Cleared: Nov. 18 1998 14:21 (|) Snapshot PCR: 512/512 cps Collection Time: 0 day(s) 00:00:10 Corrupted: NO Traffic Cells CLP Avg CPS %util Chan Stat Addr: 31132770 From Port : 5370 0 526 102 To Network : 5369 --- 526 102 From Network: 5370 0 526 102 To Port : 5370 0 526 102 Rx Frames Rcv : 0 NonCmplnt Dscd: 0 Rx Q Depth : 0 Tx Q Depth : 0 Rx CLP0 : 5370 Rx Nw CLP0 : 5370 Igr VSVD ACR : 0 Egr VSVD ACR : 0 Tx Clp 0 : 5370 Rx Clp 0+1 : 5370 Tx Clp 0 Dscd : 0 Tx Clp 1 Dscd : 0 Tx Clp0+1 Dscd: 0 Last Command: dspchstats 3.1.10.159 1

   Use this formula to compute the PCR for a Strcutured-CAS connection with no partial fill where the number of DS0s (N) is odd:

   {8000 * [ (1 + N * 49) / 48 ] / 46.875} = {526.22} = 527

   So, now we need to change the parameters for this connection.

   BPX-B

   Last Command: cnfcon 3.1.10.159 527 * * * Y ----------------------------------------------------------------------- wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 14:26 EST Conn: 3.1.10.159 wss-bpxc 10.1.10.156 cbr Status:OK PCR(0+1) % Util CDVT(0+1) Policing 527/527 100/100 1000/1000 4/4 Owner: LOCAL Restriction: NONE COS: 0 Trunk Cell Routing Restrict: Y Path: wss-bpxb 1.1-- 1.1wss-bpxc Pref: Not Configured wss-bpxb BXM : OK wss-bpxc BXM : OK Line 3.1 : OK Line 10.1 : OK OAM Cell RX: Clear NNI : OK NNI : OK Conn: 3.1.10.159 wss-bpxc 10.1.10.156 cbr Status:OK PCR(0+1) % Util CDVT(0+1) Policing 527/527 100/100 1000/1000 4 Trunk Cell Routing Restrict: Y Last Command: dspcon 3.1.10.159 ----------------------------------------------------------------------- wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 14:30 EST Channel Statistics for 3.1.10.159 Cleared: Nov. 18 1998 14:29 (|) Snapshot PCR: 527/527 cps Collection Time: 0 day(s) 00:00:20 Corrupted: NO Traffic Cells CLP Avg CPS %util Chan Stat Addr: 31132770 From Port : 10729 0 526 99 To Network : 10728 --- 526 99 From Network: 10729 0 526 99 To Port : 10729 0 526 99 Rx Frames Rcv : 0 NonCmplnt Dscd: 0 Rx Q Depth : 0 Tx Q Depth : 0 Rx CLP0 : 10729 Rx Nw CLP0 : 10729 Igr VSVD ACR : 0 Egr VSVD ACR : 0 Tx Clp 0 : 10729 Rx Clp 0+1 : 10729 Tx Clp 0 Dscd : 0 Tx Clp 1 Dscd : 0 Tx Clp0+1 Dscd: 0 Last Command: dspchstats 3.1.10.159 1

5. BPX—Add and Verify Voice PVC

   For the single DS0 voice connection, use the same PCR calculation formula used previously. In this case, N = 1:

   {8000 * [(1+ N*49)/48 ]/46.875} = {177.78} = 178

   BPX-B

   Last Command: addcon 3.1.10.153 wss-bpxc 10.1.10.154 cbr 178 * 100 * Y ----------------------------------------------------------------------- wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 16:06 EST Conn: 3.1.10.153 wss-bpxc 10.1.10.154 cbr Status:OK PCR(0+1) % Util CDVT(0+1) Policing 178/178 100/100 100/100 4/4 Owner: LOCAL Restriction: NONE COS: 0 Trunk Cell Routing Restrict: Y Path: wss-bpxb 1.1-- 1.1wss-bpxc Pref: Not Configured wss-bpxb BXM : OK wss-bpxc BXM : OK Line 3.1 : OK Line 10.1 : OK OAM Cell RX: Clear NNI : OK NNI : OK Conn: 3.1.10.153 wss-bpxc 10.1.10.154 cbr Status:OK PCR(0+1) % Util CDVT(0+1) Policing 178/178 100/100 100/100 4 Trunk Cell Routing Restrict: Y Last Command: dspcon 3.1.10.153 ----------------------------------------------------------------------- wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 16:08 EST Channel Statistics for 3.1.10.153 Cleared: Nov. 18 1998 16:07 (|) Snapshot PCR: 178/178 cps Collection Time: 0 day(s) 00:01:36 Corrupted: NO Traffic Cells CLP Avg CPS %util Chan Stat Addr: 31132878 From Port : 17080 0 177 99 To Network : 17080 --- 177 99 From Network: 17080 0 177 99 To Port : 17080 0 177 99 Rx Frames Rcv : 0 NonCmplnt Dscd: 0 Rx Q Depth : 0 Tx Q Depth : 0 Rx CLP0 : 17080 Rx Nw CLP0 : 17080 Igr VSVD ACR : 0 Egr VSVD ACR : 0 Tx Clp 0 : 17080 Rx Clp 0+1 : 17080 Tx Clp 0 Dscd : 0 Tx Clp 1 Dscd : 0 Tx Clp0+1 Dscd: 0 Last Command: dspchstats 3.1.10.153 1

6. 3810—Verify Voice Call Operation

   For the sake of completeness, the output below shows the operation of the voice call on the 3810 when someone picks up the phone connected to port 1/2 on 3810E and dials 6-8888. With this configuration, there is not much to see on the CESM cards or on the BPX. We do not have any visibility into the signaling bits on the CESM card or the data contained therein. So, all we see is a constant 177 cells/sec running through the PVC.

   3810-E
   wss-3810e# deb voice cp Voice Call Processing State Machine debugging is on wss-3810e# deb voice ee Voice end-to-end call manager debugging is on wss-3810e#

   Access the phone on port 1/2 and dial 68888:

   Nov 20 13:03:22:  1/2: CPD( ), idle gets event seize_ind
   Nov 20 13:03:22:  1/2: EECM(out), ST_NULL            EV_ALLOC_DSP      
   Nov 20 13:03:22:  1/2: CPD( ), idle gets event dsp_ready
   Nov 20 13:03:22:  1/2: CPD( ), idle ==> collect
   Nov 20 13:03:27:  1/2: CPD(in), collect gets event digit
   Nov 20 13:03:27:  1/2: EECM(in), ST_DIGIT_COLLECT   EV_PARSE_DIGIT    6
   Nov 20 13:03:27:  1/2: CPD(in), collect gets event addr_done
   Nov 20 13:03:27:  1/2: CPD(in), collect ==> request
   Nov 20 13:03:27:  1/2: EECM(in), ST_ADDRESS_DONE    EV_OUT_SETUP      
   Nov 20 13:03:27:  1/2: CPD(in), request gets event call_proceeding
   Nov 20 13:03:27:  1/2: CPD(in), request ==> in_wait_answer
   Nov 20 13:03:27:  -1/-1: EECM(out), ST_NULL            EV_IN_SETUP       
   Nov 20 13:03:27:  1/2: EECM(in), ST_OUT_REQUEST     EV_IN_PROCEED     
   Nov 20 13:03:27:  0/3: CPD( ), idle gets event call_ind
   Nov 20 13:03:27:  0/3: EECM(out), ST_SEIZE           EV_ALLOC_DSP      
   Nov 20 13:03:27:  0/3: CPD( ), idle gets event dsp_ready
   Nov 20 13:03:27:  0/3: CPD( ), idle ==> out_wait_ready
   Nov 20 13:03:27:  0/3: CPD(out), out_wait_ready gets event ready_ind
   Nov 20 13:03:27:  0/3: EECM(out), ST_SEIZE           EV_OUT_ALERT      
   Nov 20 13:03:27:  1/2: EECM(in), ST_OUT_REQUEST     EV_IN_ALERT       
   Nov 20 13:03:27:  1/2: CPD(in), in_wait_answer gets event call_accept
   Nov 20 13:03:27:  1/2: EECM(in), ST_OUT_REQUEST     EV_OUT_ALERT_ACK  
   Nov 20 13:03:27:  0/3: CPD(out), out_wait_ready ==> addr_forward
   Nov 20 13:03:27:  0/3: CPD(out), addr_forward gets event dial_done
   Nov 20 13:03:27:  0/3: CPD(out), addr_forward ==> out_wait_answer

   Other side picks up the phone:

   Nov 20 13:03:34:  0/3: CPD(out), out_wait_answer gets event answer_ind
   Nov 20 13:03:34:  0/3: CPD(out), out_wait_answer ==> connected
   Nov 20 13:03:34:  0/3: EECM(out), ST_IN_PENDING      EV_OUT_CONNECT    
   Nov 20 13:03:34:  1/2: EECM(in), ST_WAIT_FOR_ANSWER EV_IN_CONNECT     
   Nov 20 13:03:34:  1/2: CPD(in), in_wait_answer gets event call_answered
   Nov 20 13:03:34:  1/2: CPD(in), in_wait_answer ==> connected

   Other side hangs up the phone:

   Nov 20 13:03:42:  0/3: CPD(out), connected gets event disconnect_ind
   Nov 20 13:03:42:  0/3: CPD(out), connected ==> tx_disc
   Nov 20 13:03:42:  0/3: EECM(out), ST_ACTIVE          EV_OUT_REL        
   Nov 20 13:03:42:  0/3: CPD(out), tx_disc gets event peer_msg_done
   Nov 20 13:03:42:  0/3: CPD(out), tx_disc ==> disconnect_wait
   Nov 20 13:03:42:  1/2: EECM(in), ST_ACTIVE          EV_IN_REL         
   Nov 20 13:03:42:  1/2: CPD(in), connected gets event peer_onhook
   Nov 20 13:03:42:  1/2: CPD(in), connected ==> disconnect_wait
   Nov 20 13:03:42:  1/2: EECM(in), ST_DISCONN_PENDING EV_OUT_REL_ACK    
   Nov 20 13:03:43:  0/3: CPD(out), disconnect_wait gets event idle_ind
   Nov 20 13:03:43:  0/3: CPD(out), disconnect_wait ==> idle_pending
   Nov 20 13:03:43:  0/3: EECM(out), ST_DISCONN_PENDING EV_FREE_DSP       
   Nov 20 13:03:43:  0/3: CPD( ), idle_pending gets event timer1
   Nov 20 13:03:43:  0/3: CPD( ), idle_pending ==> idle
   Nov 20 13:03:43:  1/2: CPD(in), disconnect_wait gets event idle_ind
   Nov 20 13:03:43:  1/2: CPD(in), disconnect_wait ==> idle_pending
   Nov 20 13:03:43:  1/2: EECM(in), ST_DISCONN_PENDING EV_FREE_DSP       
   Nov 20 13:03:43:  1/2: CPD( ), idle_pending gets event timer1
   Nov 20 13:03:43:  1/2: CPD( ), idle_pending ==> idle
   wss-3810e#

On-Hook Detection

The CESM card has the capability to apply some intelligence to the signaling bits captured on Structured-CAS connections. We can configure the channel to recognize when the call is off-hook and on-hook. If the signaling bits indicate an on-hook condition, the channel generates minimal information to the other side of the connection. When the signaling bits change to an off-hook condition, traffic flows at the 177 cells-per-second rate.

Note:  You can use the on-hook detection feature on 1x64 kbps connections only. Thus, if you want to configure this feature for each DS0 on a T1, you need to configure 24 logical ports and assign one channel for each port.

1. 3810—Identify On-hook/Off-hook Signaling Code

   The first step in implementing on-hook detection is to understand the ABCD bits states for the signaling plan employed by the end equipment. In this example, we have configured the Cisco MC3810 digital voice port for E&M Immediate signaling. We will use the debug facilities on the 3810 to read the signaling states in an on-hook and off-hook condition. The debug serial interface command enables the robbed bit signaling display in the show controller t1 output, as shown below:

   MGX-B
   wss-3810f# deb serial int Serial network interface debugging is on wss-3810f# clear count Clear "show interface" counters on all interfaces [confirm]y %CLEAR-5-COUNTERS: Clear counter on all interfaces by console

   3810-F—On-Hook

   wss-3810f# show cont t1 0 T1 0 is up. No alarms detected. Framing is ESF, Line Code is B8ZS, Clock Source is Line. Data in current interval (11 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs Robbed bit signals state: timeslots rxA rxB rxC rxD txA txB txC txD 4 0 0 0 0 0 0 0 0

   3810-F—Off-Hook

   wss-3810f# show cont t1 0 T1 0 is up. No alarms detected. Slot 3 CSU Serial #08104198 Model TEB HWVersion 4.70 Framing is ESF, Line Code is B8ZS, Clock Source is Line. Data in current interval (74 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs Robbed bit signals state: timeslots rxA rxB rxC rxD txA txB txC txD 4 1 1 1 1 1 1 1 1

2. CESM—Modify Channels for On-Hook Detection

   To do this, we need to make only two modifications to the previous Structured-CAS configuration:

   • Enable Signaling Detection for the channel.

   • Modify the on-hook code to reflect the ABCD bit pattern for an on-hook condition.

   Here, the on-hook ABCD bit pattern is 0000 in binary notation, which is 0 in decimal notation.

   MGX-B
   wss-mgxb.1.10.CESM.a > cnfchan 153 1000 1000 0 1 2 1 wss-mgxb.1.10.CESM.a > xcnfchan -chn 153 -onhkcd 0

   MGX-C
   wss-mgxc.1.10.CESM.a > cnfchan 154 1000 1000 0 1 2 1 wss-mgxc.1.10.CESM.a > xcnfchan -chn 154 -onhkcd 0

3. CESM—Monitor Channel Statistics

   Once again we review the channel and SAR counts for the CESM card. When the channel is in an on-hook condition, no cell traffic is recorded on the CESM counters (though we will see the keepalive cells on the BPX channel statistics). When either channel detects that the signaling bits have changed to an off-hook condition, that channel will begin to send cells toward the network.

   Note:  Just because one side goes off-hook and starts sending cells does not imply that the other side will start sending cells back. If the other side is configured for on-hook detection, it follows the same rules and will not send cells until it detects signaling bits indicating an off-hook condition.

   MGX-B—On-Hook

   wss-mgxb.1.10.CESM a > clrchancnts wss-mgxb.1.10.CESM.a > clrsarcnts wss-mgxb.1.10.CESM.a > dspchancnt 153 ChanNum: 153 Chan State: okay Chan RCV ATM State: Normal Chan XMT ATM State: Normal Cell Loss Status: No Cell Loss Reassembled Cells: 0 Generated Cells: 0 Header Errors: 0 Seqence Mismatches : 0 Lost Cells: 0 Channel Uptime (secs.) 7051 Signalling Status Onhook wss-mgxb.1.10.CESM.a > dspsarcnt 153 SarShelfNum: 1 SarSlotNum: 10 SarChanNum: 153 Tx Rx --------------- --------------- Total Cells: 0 0 Total CellsCLP: 0 0 Total CellsAIS: 0 0 Total CellsFERF: 0 0 Total CellsEnd2EndLpBk: 0 0 Total CellsSegmentLpBk: 0 0 RcvCellsDiscOAM: 0

   MGX-B—Off-Hook

   wss-mgxb.1.10.CESM.a > dspchancnt 153 ChanNum: 153 Chan State: okay Chan RCV ATM State: Normal Chan XMT ATM State: Normal Cell Loss Status: No Cell Loss Reassembled Cells: 3151 Generated Cells: 5199 Header Errors: 0 Seqence Mismatches : 0 Lost Cells: 3 Channel Uptime (secs.) 7122 Signalling Status Offhook wss-mgxb.1.10.CESM.a > dspsarcnt 153 SarShelfNum: 1 SarSlotNum: 10 SarChanNum: 153 Tx Rx --------------- --------------- Total Cells: 8150 6102 Total CellsCLP: 0 0 Total CellsAIS: 0 0 Total CellsFERF: 0 0 Total CellsEnd2EndLpBk: 0 0 Total CellsSegmentLpBk: 0 0 RcvCellsDiscOAM: 0

4. BPX—Monitor Channel Statistics

   Looking at the channel statistics on the BPX nodes, we can see the three phases of call. Because the counters are averages, it would take a longer time than we allowed here for the "Avg. CPS" to reach the PCR.

   BPX-B—On-Hook

   wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 16:13 EST Channel Statistics for 3.1.10.153 Cleared: Nov. 18 1998 16:12 (\) Snapshot PCR: 178/178 cps Collection Time: 0 day(s) 00:00:14 Corrupted: NO Traffic Cells CLP Avg CPS %util Chan Stat Addr: 31132878 From Port : 16 0 1 0 To Network : 16 --- 1 0 From Network: 16 0 1 0 To Port : 16 0 1 0 Rx Frames Rcv : 16 NonCmplnt Dscd: 0 Rx Q Depth : 0 Tx Q Depth : 0 Rx CLP0 : 16 Rx Nw CLP0 : 16 Igr VSVD ACR : 0 Egr VSVD ACR : 0 Tx Clp 0 : 16 Rx Clp 0+1 : 16 Tx Clp 0 Dscd : 0 Tx Clp 1 Dscd : 0 Tx Clp0+1 Dscd: 0 Last Command: dspchstats 3.1.10.153 1

   BPX-B—3810E Off-Hook

   wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 16:15 EST Channel Statistics for 3.1.10.153 Cleared: Nov. 18 1998 16:14 (-) PCR: 178/178 cps Collection Time: 0 day(s) 00:00:18 Corrupted: NO Traffic Cells CLP Avg CPS %util Chan Stat Addr: 31132878 From Port : 1232 0 68 38 To Network : 1232 --- 68 38 From Network: 20 0 1 0 To Port : 20 0 1 0 Rx Frames Rcv : 12 NonCmplnt Dscd: 0 Rx Q Depth : 0 Tx Q Depth : 0 Rx CLP0 : 1232 Rx Nw CLP0 : 20 Igr VSVD ACR : 0 Egr VSVD ACR : 0 Tx Clp 0 : 20 Rx Clp 0+1 : 1232 Tx Clp 0 Dscd : 0 Tx Clp 1 Dscd : 0 Tx Clp0+1 Dscd: 0 This Command: dspchstats 3.1.10.153 1

   BPX-B—3810F Off-Hook

   wss-bpxb TN StrataCom BPX 8600 9.1.04 Nov. 18 1998 16:15 EST Channel Statistics for 3.1.10.153 Cleared: Nov. 18 1998 16:14 (|) PCR: 178/178 cps Collection Time: 0 day(s) 00:00:30 Corrupted: NO Traffic Cells CLP Avg CPS %util Chan Stat Addr: 31132878 From Port : 3499 0 113 63 To Network : 3498 --- 113 63 From Network: 1479 0 48 26 To Port : 1479 0 48 26 Rx Frames Rcv : 12 NonCmplnt Dscd: 0 Rx Q Depth : 0 Tx Q Depth : 0 Rx CLP0 : 3499 Rx Nw CLP0 : 1479 Igr VSVD ACR : 0 Egr VSVD ACR : 0 Tx Clp 0 : 1479 Rx Clp 0+1 : 3499 Tx Clp 0 Dscd : 0 Tx Clp 1 Dscd : 0 Tx Clp0+1 Dscd: 0 This Command: dspchstats 3.1.10.153 1

5. 3810—Verify Voice Call Operation

   Voice call operation, from the 3810 perspective, remains unchanged. If you want to monitor the ABCD bit changes on the 3810 in real time, use the following debug command:

   3810-E
   wss-3810e# deb dsx1 sig DSX1 Signaling debugging is on wss-3810e# Slot 3 Receive DS0 (3) ABCD= 0 Timestamp 7908877 Slot 3 Receive DS0 (3) ABCD= 0 Timestamp 7909979

Command List

This section lists the commands, with available options and values, used in the configuration examples throughout this document.

addln line_num , where…

• line_num can be a numeric value in the range from 1 to 8.

cnfln line_num line_code line_len clk_src [E1-signaling] , where…

• line_num can be a numeric value in the range from 1 to 8.

• line_code can be:

  • 2 = B8ZS (T1)

  • 3 = HDB3 (E1)

  • 4 = AMI (T1/E1)

• line_len (line length) can be:

  • 8 = E1 with SMB line module

  • 9 = E1 with RJ48 line module

  • 10 = T1 0 to 131 ft. line build out

  • 11 = T1 131 to 262 ft.

  • 12 = T1 262 to 393 ft.

  • 13 = T1 393 to 524 ft.

  • 14 = T1 524 to 655 ft.

  • 15 = T1 > 655 ft.

• clk_src (clock source) can be:

  • 1 = Loop clock; the transmit clock on the interface is locked to the receive clock from the attached device.

  • 2 = Local clock; the CESM-8 cards uses clock derived from the backplane to drive the transmit clock.

• E1-signaling can be:

  • CAS = Channel Associated Signaling; signaling information is contained in timeslot 16 and framing is carried in timeslot 0.

  • CAS_CRC = CAS with Cyclic Redundancy Check (CRC).

  • CCS = Common Channel Signaling; signaling information is not tied to a particular timeslot. Framing is still carried in the first timeslot.

  • CCS_CRC = CCS with CRC.

  • CLEAR = No attempt is made to identify framing or signaling on the incoming stream. The entire data stream is considered data.

addport port_num line_num begin_slot num_slot port_type , where…

• port_num can be:

  • In the range from 1 to 192 = T1 (8 lines * 24 DS0s/line)

  • In the range from 1 to 248 = E1 (8 lines * 31 DS0s / line)

• line_num can be a numeric value from 1 to 8.

• begin_slot is the beginning time slot in line to start port.

• num_slot is the number of DS0 time slots assigned to the port.

• port_type can be:

  • 1 = Structured

    For T1, you can set up a structured port type for bandwidths ranging from 1 to 24 DS0s.

    For E1, structured ports can not include the framing timeslot (CCS or CAS), or the signaling timeslot (CAS).

  • 2 = Unstructured

    For T1, unstructured port = 24 DS0s.

    For E1, unstructured port can only be configured when the E1 signaling is set to CLEAR.

  • 3 = framingOnVcDisconnect

    This port type is basically the same as unstructured with one key difference—when an unstructured port experiences a network-side cell loss, the CESM-8 transmits conditional data down the line. With framingOnVcDisconnect, cell loss from the network side results in the CESM-8 looping back data received from the CPE back out the port so that the CPE does not lose framing. The same restrictions on DS0 count and signaling type present for an unstructured port apply here.

addchan chan_num port_num CesCas partial_fill cond_data cond_signaling , where…

• chan_num can be a numeric value in the range from 32 to 279.

• port_num can be:

  • In the range from 1 to 192 = T1 (8 lines * 24 DS0s/line)

  • In the range from 1 to 248 = E1 (8 lines * 31 DS0s / line)

• CesCas can be:

  • 1 = Basic; the CES interworking function does not recognize signaling information for special transport across the network.

  • 2 = e1Cas; recover E1 Channel Associated Signaling (CAS) for transport.

  • 3 = ds1SfCas; recover T1 Channel Associated Signaling from a SuperFrame structure (ABAB).

  • 4 = ds1EsfCas; recover T1 CAS from an Extended SuperFrame structure (ABCD).

• partial_fill can be 0 (zero) or a value from 20 to 47:

  • 0 or 47 = Fully filled

  • In the range from 20 to 47 = E1 structured

  • In the range from 25 to 47 = T1 structured

  • In the range from 33 to 47 = T1/E1 unstructured

• cond_data can be:

  • 0 to 255 = Structured Data Transport (SDT)

  • 255 = Unstructured Data Transport (UDT)

• cond_signaling is a decimal representation of the the 4-bit ABCD bit pattern, in the range from 0 to 15, where…

  • 0 = 0000 binary

  • 1 decimal = 0001 binary

  • 8 decimal = 1000 binary

  • 15 decimal = 1111 binary

cnfchan chan_num CDV CLIP bufsize clockmode IdleDetEnable ExtIStrig , where…

• chan_num can be a numeric value in the range from 32 to 279.

• CDV (Cell Delay Variation) can be:

  • In the range from 1000 to 24000 micro seconds, for T1 (in increments of 125).

  • In the range from 1000 to32000 micro seconds, for E1 (in increments of 125).

• CLIP (Cell Loss Integration Period) can be a value in the range from 1000 to 65535 milliseconds.

• bufsize (the egress buffer size, in bytes) can be:

  • 0 = Autocompute buffer size (must be large enough to hold 8 SAR-PDUs).

  • Minimum buffer size = 384 bytes (8 cell payloads to one complete seq. num cycle).

  • Maximum buffer size = 9216 for T1 structured; 16384 for others.

• clockmode can be:

  • 1 = Synchronous (UDT/SDT)

  • 2 = SRTS (UDT)

  • 3 = Adaptive (UDT)

• IdleDetEnable can be:

  • 1 = Disable

  • 2 = Enable

• ExtIStrig can be:

  • 1 = Disable idle suppression

  • 2 = Enable idle suppression

xcnfchan -chn chan_num -en chan_status [-cbrserv cbr_service -clkmode mode -cdv CDV -clip CLIP -maxbuf max_buf_size], where…

• chan_num can be a numeric value in the range from 16 to 264.

• chan_status can be:

  • 1 = Add

  • 2 = Delete

  • 3 = Modify

• cbr_service can be:

  • 1 = Unstructured

  • 2 = Structured

• mode can be:

  • 1 = Synchronous

  • 2 = SRTS

  • 3 = Adaptive

• CDV can be a numeric value in the range from 1 to 65535.

• CLIP can be a numeric value in the range from 1000 to 65535.

• max_buf_size can be a numeric value in the range from 1 to 35565.

Verify

There is currently no verification procedure available for this configuration.

Troubleshoot

There is currently no specific troubleshooting information available for this configuration.

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