This appendix contains information for the hardware that makes up a Cisco MGX 8950 system. The descriptions apply to the enclosure, power systems, cooling system, and cards. The following types of information are provided:
•Operational ranges, such as bits per second, voltage ranges, and temperature ranges.
•Physical layer characteristics, such as line coding and line framing.
•Standards compliance, supported protocols, and tolerances, such as parts per million (ppm) for clocks and jitter.
•Per card capacities, such as types and sizes of memory, number of ports, and maximum number of connections.
Enclosure and System Power Specifications
This section describes the physical characteristics and system power requirements for the MGX 8950. Enclosure and electrical characteristics are shown in Table A-1. For a list of the dimensions, weight, and power consumption for each card, see the " Physical and Electrical Characteristics for Cards" section later in this appendix. For a list of the AC power plugs for domestic and international use, see Appendix B, "Cabling Summary."
Table A-1 Enclosure and Electrical Characteristics
Items
Values
Card Slot Capacity
Four single-height slots reserved for XM-60s.
Two double-height slots reserved for PXM45/Bs. Up to 28 single-height slots or up to 14 double-height slots.
Enclosure Size, AC-powered system
DC-powered system
Height: 40.25 inches (102.3 cm). Width: 19 inches (45.08 cm) for all enclosure modules. Depth: 21.5 inches (54.6 cm) (excluding cable management and front door). Racks must have 17.75 inches minimum between mounting rails.
Height: 29.75 inches (71.1 cm). Width: 19 inches (45.08 cm) for all enclosure modules. Depth: 21.5 inches (54.6 cm) (excluding cable management and front door). Racks must have 17.75 inches minimum between mounting rails.
Shipping Weight for Populated Enclosure
DC: 200 lb (90 kg) with 2 DC PEMs AC: 300 lb (136 kg)
Shipping Weight for Individual Components
Front and back cards: 6.0 lb (2.73 kg) per card set Card cage with boards: 160 lb (72.73 kg) Exhaust plenum: 8 lb Fan tray: 9.5 lb Inlet plenum: 8 lb AC power tray with power supplies: 45 lb APS Connector: 1 lb
Clearance Requirement for the Enclosure
Minimum 30 inches front and rear; 12-inch side clearance recommended.
Power Input Voltage
AC system: Normal operating range is 200-240 VAC, 47 to 63 Hz. The maximum voltage range is 180-254 VAC. DC system: -42 to -56 VDC.
Current Requirements, AC System
Configuration-dependent: use Network Design Tool for exact requirements. For general planning purposes: 14.4A at a nominal voltage of 200 VAC. At the minimum voltage limit of 180 VAC, the current draw is a maximum of 21A.
Current Requirements, DC System
Configuration-dependent: use Network Design Tool for exact requirements. For general planning purposes: 76A (37.5A per feed) at nominal -48 VDC; 86A (43A per feed) at -42 VDC minimum.
Input AC Power Connector
NEMA L6-30 input connector. For a list of the AC power plugs for domestic and international use, see Appendix B, "Cabling Summary."
DC Input Connections
Three-position terminal block for 6 AWG wire (10 square millimeters) and #10 screw lugs designed for 6 AWG wire. Note that the customer's wire must be terminated with a terminal lug that accepts #10-32 screws.
Fan Tray Power Consumption
Nine fans per tray, each dissipates 8W (0.16A) of -48V power, totalling 72W per tray.
Operating Environment
0-40 degrees Celsius (32-104 degrees Fahrenheit) normal operation (50 degrees Celsius or 122 degrees Fahrenheit up to 72 hours; 20 to 30 degrees Celsius recommended.). Maximum 85% relative humidity.
Shock
Withstands 10 G, 10 ms at 1/2 sine wave.
Vibration
Withstands 1/4 G, 20-500 Hz.
Heat Transfer to Environment
AC-powered: maximum 14,300 Btu/hr. DC-powered: maximum 12,300 Btu/hr.
Physical and Electrical Characteristics for Cards
For quick reference, Table A-2 shows physical dimensions and power consumption for each card. Detailed information for each card appears later in this appendix.
Table A-2 Physical Characteristics and Power Consumption by Card
This section contains general specifications for the Processor Switching Module (PXM45/B). The information in Table A-3 includes information for the two types of back cards—the PXM-UI-S3 user interface and the Hard Drive back card.
Table A-3 PXM45/B Specifications
Category
Description
Maximum switch fabric throughput
45 Gbps. The switching functions of the PXM45/B are not used on the MGX 8950.
Control access
These ports exist on the PXM-UI-S3 back card
Control port: RJ45 connector, EIA/TIA 232, DTE mode, asynchronous interface 19,200 baud, 1 start, 1 stop, no parity.
LAN port: RJ45 connector, 10BASE-T, 802.3 Ethernet
Controller access port
This port exists on the PXM-HD back card
Connector: OC-3 SC
LEDs on PXM45/B front card
LEDs display status
Status for the card:
•Green means active
•Red means failed
•Yellow indicates the standby card
LAN activity: flashing green indicates activity
Node alarm:
•Blue indicates a critical alarm
•Red indicates major alarm
•Yellow indicates minor alarm
Node power (note that each AC power supply also has a LED):
•"DC OK A" is green for okay or red for trouble
•"DC OK B" is green for okay or red for trouble
Alarm history: ACO (Alarm Cut Off)
Port interface (per port):
•Green means active and okay
•Red means active and local alarm
•Yellow means active and remote alarm
•No light means inactive or not provided
LEDs on back cards
Green means active No light means inactive
Synchronization
These clock sources satisfy Stratum 3 requirements
8 kHz clock derived from the following sources:
•Internal 8 kHz clock (+/- 4.6 ppm)
•Recovered clock from service modules or trunk line interfaces
•External BITS clock port
BITS clock interface
Clk1 with an RJ45 connector Clk2 with an RJ45 connector
Processor clock speed and memory specifics
Clock speed: 350 MHz internal, 100 MHz external
Flash memory: 2 MB
DRAM: 256 MB
Tertiary cache: 2 MB
Secondary cache: 256 KB
BRAM: 512 KB
Hard disk: 20 GB
Alarm indicators (audible and visual)
Central office-compatible alarm indicators and controls through a DB15 connector
Maintenance features
1:1 redundancy Memory protection feature Temperature monitoring Supply voltage monitoring Hot-pluggable
Card dimensions
Front card: 15.65 in. by 16.50 in. (39.75 cm by 42.75 cm) Back cards: 7 in. by 4.125 in. (18.42 cm by 10.48 cm)
Power
Requires -48 VDC, dissipates 100W, typical
.
The PXM45/B card LEDs light in the following sequence immediately after the card is inserted into the switch:
1. As soon as the PXM45/B detects power, all of the front faceplate LEDs (except DC-A/DC-B) flash on then off for about 1/3 of a second. This means that the hardware has come up (FPGAs have completely downloaded), and the card is ready to download its software and boot up. If all these LEDs remain on, it means that the hardware is not coming up, and the card will not boot. This happens only if the card is inoperable.
2. ENET LED flashes green if a LAN port cable is attached; otherwise, it stays off.
3. System Status LED flashes red while the card is booting, downloading software, or initializing.
4. DC-A/DC-B LEDs are green if the corresponding power supply trays are detected.
5. After the software download is complete, the System Status LED flashes yellow momentarily. It then flashes green if it becomes the active PXM. It continues to flash yellow if it becomes the standby PXM.
AXSM Interface Characteristics
This section contains details for the AXSM cards. For physical characteristics, see Table A-4. For the T3 and E3 interface characteristics, see Table A-5 and Table A-6, respectively. For ATM interface characteristics, see Table A-7. And for OC-3c, OC-12c, and OC-48c interface characteristics, see Table A-8, Table A-9, and Table A-10 respectively.
Table A-4 Physical Characteristics of the AXSM Modules
Category
Description
LED Indicators Per Card
Active (green), Standby (yellow), Fail (red)
LED Indicators Per Line
One per line: Active and OK (green), Active and Local Alarm (red) Active and Remote Alarm (yellow)
Maintenance and Serviceability
Card-dependent
Card Size
Front card: 7.25" x 16.25" (18.43 cm x 41.28 cm) Back cards: 7" x 4.5" (17.78 cm x 11.43 cm)
Power
-48 VDC, 115W
Safety
EN 60950 2nd edition (including EN 41003) UL 1950 3rd edition
Compliance
Card-dependent
ESD
EN 61000-4-2
Table A-5 T3 Interface Characteristics
Category
Description
Line Interface
SMB (75 ohms)
Line Rate
44.736 Mbps ± 4.6 ppm
Synchronization
Loop-timed, receiver, or synchronized to shelf (in normal mode).
Line Code
Bipolar 3 Zero Substitution (B3ZS) per ANSI T1.404 (T3)
Line Framing
C-Bit Parity
Input Jitter Tolerance
Per ATT TR 540141
Output Jitter
Per Telcordia GR-499-CORE
Physical Layer Alarms
LOS, OOF, AIS, RAI
Physical Layer Performance Statistics
LCV, LES, LSES, CV, ES, SES, SEFS, AISS, UAS
Table A-6 E3 Interface Characteristics
Category
Description
Line Interface Connector
SMB (75 ohms)
Line Rate
34.368 Mbps ± 20 ppm
Synchronization
Transmitter can be: loop-timed, receiver, or synchronized to shelf (normal mode)
Line Code
HDB3
Line Framing
G.832
Input Jitter Tolerance
34.368 Mbps
Output Jitter Generation
34.368 Mbps
Physical Layer Alarms
LOS, OOF, AIS, RAI
Physical Layer Statistics
LCV, LES, LSES, CV, ES, SES, SEFS, AISS, UAS
Table A-7 ATM Interface Characteristics
Category
Description
Standards
ATM UNI v3.1, ITU-T G.804, per CCITT I.361
Channel Configuration
128K per card
VPI/VCI Ranges
VPI: 0 to 255 for UNI and 0 to 4096 for NNI VCI: 0 to 65,535
Operational ranges, such as bits per second, voltage ranges, and temperature ranges.