Cisco 2600 Series Multiservice Platforms

Table Of Contents

Cisco Modular Access Router Cable Specifications

Safety Warnings

Console and Auxiliary Port Signals and Pinouts

Console Port Signals and Pinouts

Auxiliary Port Signals and Pinouts

Ethernet Cable Pinouts

Ethernet AUI Cable Pinouts

10BASE-T Connector Pinouts

Fast Ethernet Connector Pinouts

Token Ring Port Pinouts

Token Ring STP Connector Pinouts

Token Ring UTP Connector Pinouts

ISDN BRI Interface

ISDN BRI Connections

ISDN BRI Pinouts

CT1/PRI Pinouts

CT1/PRI-CSU Pinouts

CE1/PRI Interface

CE1/PRI Cables

CE1/PRI Pinouts

56/64-kbps DSU/CSU Signals and Pinouts

T1/E1 Trunk and Digital Voice Port Pinouts (RJ-48)

Analog Voice RJ-21 Pinouts

Serial Connection Signals and Pinouts

Types of Serial Cables

Connecting the WIC to the Network

EIA/TIA-232 Interface

EIA/TIA-232 Connections

EIA/TIA-232 Serial Cable Assembly

EIA/TIA-449 Interface

EIA/TIA-449 Connections

EIA/TIA-449 Serial Cable Assembly

V.35 Interface

V.35 Connections

V.35 Serial Cable Assembly

X.21 Interface

X.21 Connections

X.21 Serial Cable Assembly

EIA-530 Interface

EIA-530 Connections

EIA-530 Serial Cable Assembly

Smart Serial Connection Signals and Pinouts

EIA/TIA-232 Smart Serial Cable Assembly

EIA/TIA-449 Smart Serial Cable Assembly

X.21 Smart Serial Cable Assembly

V.35 Smart Serial Cable Assembly

EIA-530 Smart Serial Cable Assembly

Octopus Cable Connection Signals and Pinouts

4-Port RS-232 Cable Assembly

8-Port RS-232 Cable Assembly

Cisco Modular Access Router Cable Specifications

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This document provides cable specifications for Cisco 1800 series, Cisco 2600 series, Cisco 2800 series, Cisco 3600 series, Cisco 3700 series, and Cisco 3800 series routers.

Use this document in conjunction with the following publications:

•Cisco 1800 series hardware installation documentation

•Cisco 2600 Series Hardware Installation Guide

•Cisco 2800 series hardware installation documentation

•Cisco 3600 Series Hardware Installation Guide

•Cisco 3700 Series Hardware Installation Guide

•Cisco 3800 series hardware installation documentation

•Cisco Network Modules Hardware Installation Guide

•Cisco Interface Cards Hardware Installation Guide

This document includes the following sections:

•Safety Warnings

•Console and Auxiliary Port Signals and Pinouts

•Ethernet Cable Pinouts

•Fast Ethernet Connector Pinouts

•Token Ring Port Pinouts

•ISDN BRI Interface

•CT1/PRI Pinouts

•CT1/PRI-CSU Pinouts

•CE1/PRI Interface

•56/64-kbps DSU/CSU Signals and Pinouts

•T1/E1 Trunk and Digital Voice Port Pinouts (RJ-48)

•Analog Voice RJ-21 Pinouts

•Serial Connection Signals and Pinouts

•Smart Serial Connection Signals and Pinouts

•Octopus Cable Connection Signals and Pinouts

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Note All pins not listed in the tables in this document are not connected.

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If you prefer to order cables, see your router installation guide.

Safety Warnings

Safety warnings appear throughout this publication in procedures that, if performed incorrectly, may harm you. A warning symbol precedes each warning statement. To see translations of the warnings that appear in this publication, see the Regulatory Compliance and Safety Information document that accompanies your router.

Warning	IMPORTANT SAFETY INSTRUCTIONS This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071 SAVE THESE INSTRUCTIONS
Waarschuwing	BELANGRIJKE VEILIGHEIDSINSTRUCTIES Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard praktijken om ongelukken te voorkomen. Gebruik het nummer van de verklaring onderaan de waarschuwing als u een vertaling van de waarschuwing die bij het apparaat wordt geleverd, wilt raadplegen. BEWAAR DEZE INSTRUCTIES
Varoitus	TÄRKEITÄ TURVALLISUUSOHJEITA Tämä varoitusmerkki merkitsee vaaraa. Tilanne voi aiheuttaa ruumiillisia vammoja. Ennen kuin käsittelet laitteistoa, huomioi sähköpiirien käsittelemiseen liittyvät riskit ja tutustu onnettomuuksien yleisiin ehkäisytapoihin. Turvallisuusvaroitusten käännökset löytyvät laitteen mukana toimitettujen käännettyjen turvallisuusvaroitusten joukosta varoitusten lopussa näkyvien lausuntonumeroiden avulla. SÄILYTÄ NÄMÄ OHJEET
Attention	IMPORTANTES INFORMATIONS DE SÉCURITÉ Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant entraîner des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers liés aux circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions des avertissements figurant dans les consignes de sécurité traduites qui accompagnent cet appareil, référez-vous au numéro de l'instruction situé à la fin de chaque avertissement. CONSERVEZ CES INFORMATIONS
Warnung	WICHTIGE SICHERHEITSHINWEISE Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu Verletzungen führen kann. Machen Sie sich vor der Arbeit mit Geräten mit den Gefahren elektrischer Schaltungen und den üblichen Verfahren zur Vorbeugung vor Unfällen vertraut. Suchen Sie mit der am Ende jeder Warnung angegebenen Anweisungsnummer nach der jeweiligen Übersetzung in den übersetzten Sicherheitshinweisen, die zusammen mit diesem Gerät ausgeliefert wurden. BEWAHREN SIE DIESE HINWEISE GUT AUF.
Avvertenza	IMPORTANTI ISTRUZIONI SULLA SICUREZZA Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Utilizzare il numero di istruzione presente alla fine di ciascuna avvertenza per individuare le traduzioni delle avvertenze riportate in questo documento. CONSERVARE QUESTE ISTRUZIONI
Advarsel	VIKTIGE SIKKERHETSINSTRUKSJONER Dette advarselssymbolet betyr fare. Du er i en situasjon som kan føre til skade på person. Før du begynner å arbeide med noe av utstyret, må du være oppmerksom på farene forbundet med elektriske kretser, og kjenne til standardprosedyrer for å forhindre ulykker. Bruk nummeret i slutten av hver advarsel for å finne oversettelsen i de oversatte sikkerhetsadvarslene som fulgte med denne enheten. TA VARE PÅ DISSE INSTRUKSJONENE
Aviso	INSTRUÇÕES IMPORTANTES DE SEGURANÇA Este símbolo de aviso significa perigo. Você está em uma situação que poderá ser causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha conhecimento dos perigos envolvidos no manuseio de circuitos elétricos e familiarize-se com as práticas habituais de prevenção de acidentes. Utilize o número da instrução fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham este dispositivo. GUARDE ESTAS INSTRUÇÕES
¡Advertencia!	INSTRUCCIONES IMPORTANTES DE SEGURIDAD Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los procedimientos estándar de prevención de accidentes. Al final de cada advertencia encontrará el número que le ayudará a encontrar el texto traducido en el apartado de traducciones que acompaña a este dispositivo. GUARDE ESTAS INSTRUCCIONES
Varning!	VIKTIGA SÄKERHETSANVISNINGAR Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanliga förfaranden för att förebygga olyckor. Använd det nummer som finns i slutet av varje varning för att hitta dess översättning i de översatta säkerhetsvarningar som medföljer denna anordning. SPARA DESSA ANVISNINGAR
Aviso	INSTRUÇÕES IMPORTANTES DE SEGURANÇA Este símbolo de aviso significa perigo. Você se encontra em uma situação em que há risco de lesões corporais. Antes de trabalhar com qualquer equipamento, esteja ciente dos riscos que envolvem os circuitos elétricos e familiarize-se com as práticas padrão de prevenção de acidentes. Use o número da declaração fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham o dispositivo. GUARDE ESTAS INSTRUÇÕES
Advarsel	VIGTIGE SIKKERHEDSANVISNINGER Dette advarselssymbol betyder fare. Du befinder dig i en situation med risiko for legemesbeskadigelse. Før du begynder arbejde på udstyr, skal du være opmærksom på de involverede risici, der er ved elektriske kredsløb, og du skal sætte dig ind i standardprocedurer til undgåelse af ulykker. Brug erklæringsnummeret efter hver advarsel for at finde oversættelsen i de oversatte advarsler, der fulgte med denne enhed. GEM DISSE ANVISNINGER

Console and Auxiliary Port Signals and Pinouts

Your router comes with a kit that contains the cable and adapters you need to connect a console terminal (an ASCII terminal or PC running terminal emulation software) or modem to your router.

Cisco 1800 series routers, and the Cisco 2801 router, come with an accessory kit that includes the following items:

•RJ-45-to-DB-9 cable

•DB-9-to-DB-25 modem adapter

All other routers in the Cisco 2800 series come with an accessory kit that contains the following:

•RJ-45-to-DB-9 console cable

•RJ-45-to-DB-25 modem cable

For console and modem connections on Cisco 1800 and Cisco 2800 series routers, see the Cable Connection Procedures document within the Cisco 1800 series hardware installation documentation or within the Cisco 2800 series hardware installation documentation.

Cisco 2600, Cisco 3600, Cisco 3700 and Cisco 3800 series routers come with a console and auxiliary cable kit that includes the following items:

•RJ-45-to-RJ-45 rollover cable

•RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL)

•RJ-45-to-DB-25 female DTE adapter (labeled TERMINAL)

•RJ-45-to-DB-25 male DCE adapter (labeled MODEM)

For console connections on Cisco 2600, Cisco 3600, Cisco 3700, or Cisco 3800 series routers, proceed to the "Console Port Signals and Pinouts" section; for modem connections, proceed to the "Auxiliary Port Signals and Pinouts" section.

Console Port Signals and Pinouts

Use the thin, flat, RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL) to connect the console port to a PC running terminal emulation software. Figure 1 shows how to connect the console port to a PC. Table 1 lists the pinouts for the asynchronous serial console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL).

Figure 1 Connecting the Console Port to a PC

Table 1 Console Port Signaling and Cabling Using a DB-9 Adapter 

Console Port (DTE)	RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-9 Terminal Adapter (connected to Rollover Cable)	Console Device
Signal	RJ-45 Pin	RJ-45 Pin	DB-9 Pin	Signal
RTS	11	8	8	CTS
DTR	2	7	6	DSR
TxD	3	6	2	RxD
GND	4	5	5	GND
GND	5	4	5	GND
RxD	6	3	3	TxD
DSR	7	2	4	DTR
CTS	81	1	7	RTS

1 Pin 1 is connected internally to pin 8.

Table 2 lists the pinouts for the asynchronous serial console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 female DTE adapter (labeled TERMINAL).

Table 2 Console Port Signaling and Cabling Using a DB-25 Adapter 

Console Port (DTE)1	RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-25 Terminal Adapter	Console Device
Signal	RJ-45 Pin	RJ-45 Pin	DB-25 Pin	Signal
RTS	12	8	5	CTS
DTR	2	7	6	DSR
TxD	3	6	3	RxD
GND	4	5	7	GND
GND	5	4	7	GND
RxD	6	3	2	TxD
DSR	7	2	20	DTR
CTS	82	1	4	RTS

1 You can use the same cabling to connect a console to the auxiliary port. 2 Pin 1 is connected internally to pin 8.

Auxiliary Port Signals and Pinouts

Table 3 lists the pinouts for the asynchronous serial auxiliary port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 male DCE adapter (labeled MODEM).

Table 3 Auxiliary Port Signaling and Cabling Using a DB-25 Adapter 

Auxiliary Port (DTE)	RJ-45-to-RJ-45 Roll-Over Cable		RJ-45-to-DB-25 Modem Adapter	Modem
Signal	RJ-45 Pin	RJ-45 Pin	DB-25 Pin	Signal
RTS	11	8	4	RTS
DTR	2	7	20	DTR
TxD	3	6	2	TxD
GND	4	5	7	GND
GND	5	4	7	GND
RxD	6	3	3	RxD
DSR	7	2	8	DCD
CTS	81	1	5	CTS

1 Pin 1 is connected internally to pin 8.

You can identify a rollover cable by comparing the modular plugs at the two ends of the cable. When you hold the plugs side by side, with the tab at the back, the wire connected to the pin on the outside of the left plug should be the same color as the wire connected to the pin on the outside of the right plug. (See Figure 2.) If you purchased your cable from Cisco Systems, pin 1 is white on one connector, and pin 8 is white on the other (a rollover cable connects pins 1 and 8, 2 and 7, 3 and 6, and 4 and 5).

Figure 2 Identifying a Rollover Cable

Ethernet Cable Pinouts

This section describes the following:

•Ethernet AUI Cable Pinouts

•10BASE-T Connector Pinouts

Ethernet AUI Cable Pinouts

Figure 3 shows the Ethernet (AUI) cable assembly, and Table 4 lists the pinouts.

Figure 3 Ethernet (AUI) Cable Assembly

Table 4 Ethernet (AUI) Pinouts 

Pin	Ethernet Circuit	Signal Name
3	DO-A	Data Out Circuit A
10	DO-B	Data Out Circuit B
11	DO-S	Data Out Circuit Shield
5	DI-A	Data In Circuit A
12	DI-B	Data In Circuit B
4	DI-S	Data In Circuit Shield
7	CO-A	Control Out Circuit A (not connected)
15	CO-B	Control Out Circuit B (not connected)
8	CO-S	Control Out Circuit Shield (not connected)
2	CI-A	Control In Circuit A
9	CI-B	Control In Circuit B
1	CI-S	Control In Circuit Shield
6	VC	Voltage Common
13	VP	Voltage Plus
14	VS	Voltage Shield (L25 and M25)
Shell	PG	Protective Ground

10BASE-T Connector Pinouts

Figure 4 shows the 10BASE-T connector (RJ-45), and Table 5 lists its pinouts.

Figure 4 10BASE-T Connector (RJ-45)

Table 5 10BASE-T Connector (RJ-45) Pinouts 

Pin1	Description
1	TX+
2	TX-
3	RX+
4	—
5	—
6	RX-
7	—
8	—

1 Any pin not described is not connected.

Fast Ethernet Connector Pinouts

This section illustrates the Fast Ethernet 100BASE-TX (RJ-45) connector and lists its pinouts and signal descriptions.

Figure 5 shows the 100BASE-TX RJ-45 connector, and Table 6 lists its pinouts. The 1-port Fast Ethernet network module RJ-45 port actively terminates wire pair 4 and 5 and wire pair 7 and 8. Common-mode termination reduces electromagnetic interference (EMI) and susceptibility to common-mode sources.

Figure 5 100BaseTX RJ-45 Connector

Table 6 RJ-45 Connector Pinout

Pin	Signal
1	TX+
2	TX-
3	RX+
6	RX-

Token Ring Port Pinouts

The 1E1R 2-slot module provides both UTP and STP Token Ring connections described in these sections:

•Token Ring STP Connector Pinouts

•Token Ring UTP Connector Pinouts

The IEEE has established Token Ring as standard IEEE 802.5. The distance limitations for the IEEE 802.5 specification indicate a maximum segment distance of 328 feet (100 meters) for UTP cabling. The distance limitation is 1,640 feet (500 meters) for STP cabling.

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Note To ensure agency compliance with FCC Class B electromagnetic emissions requirements (EMI), make sure that you use the shielded RJ-45 Token Ring cable when connecting your router to the Token Ring network.

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Token Ring can operate at two different ring speeds: 4 and 16 Mbps. All devices on the ring must use the same operating speed.

Only one Token Ring port can be used at a time. The module will automatically detect which port, STP or UTP, is in use. Use the provided Token Ring cable to connect the router to a switch.

Token Ring STP Connector Pinouts

Table 7 shows the Token Ring STP port pinouts used by the 1E1R 2-slot module.

Table 7 Token Ring STP Port (DB-9) Pinouts 

9-Pin	Signal Name
1	RX-
2	Ground
3	+5 Volt, fused
4	Ground
5	TX-
6	+RX
7	Ground
8	Ground
9	+TX

Token Ring UTP Connector Pinouts

Table 8 shows the Token Ring UTP port pinouts used by the 1E1R 2-slot module.

Table 8 Token Ring UTP Port (DB-9) Pinouts 

RJ-45 Pins	Signal
1	GND
2	GND
3	TX
4	RX
5	TX
6	RX
7	GND
8	—

ISDN BRI Interface

This section contains the following topics:

•ISDN BRI Connections

•ISDN BRI Pinouts

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Warning Network hazardous voltages are present in the BRI, fractional T1/T1, and switched 56 cables. If you detach the cable, detach the end away from the router first to avoid possible electric shock. Network hazardous voltages also are present on the system card in the area of the BRI port (RJ-45 connector), fractional T1/T1 port (RJ-48C connector), and switched port (RJ-11 or RJ-48S connector), regardless of when power is turned OFF. Statement 59

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ISDN BRI Connections

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Warning The ISDN connection is regarded as a source of voltage that should be inaccessible to user contact. Do not attempt to tamper with or open any public telephone operator (PTO)-provided equipment or connection hardware. Any hardwired connection (other than by a nonremovable, connect-one-time-only plug) must be made only by PTO staff or suitably trained engineers. Statement 23

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Use a BRI cable (not included) to connect BRI ports on WAN interface cards (WICs) or on high speed WICs (HWICs) directly to an ISDN. Table 9 lists the specifications for ISDN BRI cables.

Table 9 ISDN BRI Cable Specifications

Specification	High-Capacitance Cable	Low-Capacitance Cable
Resistance (at 96 kHz)	160 ohms/km	160 ohms/km
Capacitance (at 1 kHz)	120 nF1 /km	30 nF/km
Impedance (at 96 kHz)	75 ohms	150 ohms
Wire diameter	0.024 in (0.6 mm)	0.024 in (0.6 mm)
Distance limitation	32.8 ft (10 m)	32.8 ft (10 m)

1 nF = nanoFarad

ISDN BRI Pinouts

Table 10 lists the connector signals and pinouts for an ISDN BRI S/T port. Table 11 lists the connector signals and pinouts for the ISDN BRI U port.

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Caution To prevent damage to the system, make certain you connect the BRI cable to the BRI connector only and not to any other RJ-45 connector.

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Table 10 ISDN BRI S/T Port Signals and Pinouts (RJ-45)

8-Pin1	TE2	NT3	Polarity
3	TX	RX	+
4	RX	TX	+
5	RX	TX	—
6	TX	RX	—

1 Pins 1, 2, 7, and 8 are not used. 2 TE refers to terminal terminating layer 1 aspects of TE1, TA, and NT functional groups (this applies to the ISDN BRI S/T WIC). 3 NT refers to network terminating layer 1 aspects of NT1 and NT2 functional groups.

Table 11 ISDN BRI U Port Signals and Pinouts (RJ-45)

8-Pin1	Function
3	No connection
4	Signal—Tip or Ring
5	Signal—Tip or Ring
6	No connection

1 Pins 1, 2, 7, and 8 are not used.

CT1/PRI Pinouts

Two standard T1 serial cables are available for the CT1/PRI module: null modem and straight-through. A straight-through cable connects the router to an external CSU. Null modem cables are used for back-to-back operation and testing.

The T1 interface cable has two 15-pin DB connectors at each end to connect the CT1/PRI module with the external T1 CSU. Figure 6 shows the T1 interface cable, connectors, and pinouts. Table 12 lists the pinouts for the null modem T1 cable, and Table 13 lists the pinouts for the straight-through T1 cable.

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Warning Network hazardous voltages are present in the BRI, fractional T1/T1, and switched 56 cables. If you detach the cable, detach the end away from the router first to avoid possible electric shock. Network hazardous voltages also are present on the system card in the area of the BRI port (RJ-45 connector), fractional T1/T1 port (RJ-48C connector), and switched port (RJ-11 or RJ-48S connector), regardless of when power is turned OFF. Statement 59

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Figure 6 T1 Interface Cable

Table 12 Null Modem T1 Cable Pinouts

15-Pin DB Connector			15-Pin DB Connector
Signal	Pin	Pin	Signal
Transmit Tip	1	3	Receive Tip
Receive Tip	3	1	Transmit Tip
Transmit Ring	9	11	Receive Ring
Receive Ring	11	9	Transmit Ring

Table 13 Straight-Through T1 Cable Pinouts

15-Pin DB Connector			15-Pin DB Connector
Signal	Pin	Pin	Signal
Transmit Tip	1	1	Transmit Tip
Transmit Ring	9	9	Transmit Ring
Receive Tip	3	3	Receive Tip
Receive Ring	11	11	Receive Ring

CT1/PRI-CSU Pinouts

Table 14 lists the CT1/PRI-CSU module port pinouts. Use a straight-through RJ-48C-to-RJ-48C cable to connect the T1 port to an RJ-48C jack.

Table 14 CT1/PRI-CSU Module Port (RJ-48C) Pinouts

RJ-48C Pin	Description
1	Receive Ring
2	Receive Tip
4	Ring
5	Tip

CE1/PRI Interface

This section contains the following topics:

•CE1/PRI Cables

•CE1/PRI Pinouts

CE1/PRI Cables

Cisco Systems makes four cables for the CE1/PRI modules. All four have DB-15 connectors on the CE1/PRI end and either BNC, DB-15, twinaxial, or RJ-45 connectors on the network end. Figure 7 through Figure 10 show the CE1/PRI interface cables.

Figure 7 E1 Interface Cable for 75-Ohm, Unbalanced Connections with BNC Connectors

Figure 8 E1 Interface Cable for 120-Ohm, Balanced Connections with DB-15 Connectors

Figure 9 E1 Interface Cable for 120-Ohm, Balanced Connections with Twinaxial Connectors

Figure 10 E1 Interface Cable for 120-Ohm, Balanced Connections with an RJ-45 Connector

CE1/PRI Pinouts

Table 15 lists pinouts for the CE1/PRI interface cables.

Table 15 E1 Interface Cable Pinouts 

CE1/PRI End		Network End
DB-15		BNC	DB-15		Twinax		RJ-45
Pin	Signal	Signal	Pin	Signal	Pin	Signal	Pin	Signal
9	TX Tip	TX Tip	1	TX Tip	TX-1	TX Tip	1	TX Tip
2	TX Ring	TX Shield	9	TX Ring	TX-2	TX Ring	2	TX Ring
10	TX Shield	—	2	TX Shield	Shield	TX Shield	3	TX Shield
8	RX Tip	RX Tip	3	RX Tip	RX-1	RX Tip	4	RX Tip
15	RX Ring	RX Shield	11	RX Ring	RX-2	RX Ring	5	RX Ring
7	RX Shield	—	4	RX Shield	Shield	RX Shield	6	RX Shield

56/64-kbps DSU/CSU Signals and Pinouts

Switched 56-kbps connections are provided by the 56-kbps DSU/CSU WAN interface card (WIC). For more information, see the Network Modules Hardware Installation Guide.

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Warning Network hazardous voltages are present in the BRI, fractional T1/T1, and switched 56 cables. If you detach the cable, detach the end away from the router first to avoid possible electric shock. Network hazardous voltages also are present on the system card in the area of the BRI port (RJ-45 connector), fractional T1/T1 port (RJ-48C connector), and switched port (RJ-11 or RJ-48S connector), regardless of when power is turned OFF. Statement 59

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Table 16 lists the 56/64-kbps DSU/CSU connector signals and pinouts.

Table 16 56/64-Kbps DSU/CSU (RJ-48S) Signals and Pinouts

8-Pin1	Description
1	Transmit Ring
2	Transmit Tip
7	Receive Tip
8	Receive Ring

1 Pins 3, 4, 5, and 6 are not used.

T1/E1 Trunk and Digital Voice Port Pinouts (RJ-48)

Figure 11 shows the RJ-48 connector wiring for the T1/E1 trunk cable and the digital voice port cable; Table 17 lists the pinouts.

Figure 11 RJ-48-to-RJ-48 T1/E1 Cable Wiring

Table 17 Pinouts for T1/E1 Trunk and Digital Voice Port (RJ-48)

Pin1	Signal
1	RX + (input)
2	RX - (input)
3	—
4	TX + (output)
5	TX - (output)
6	—
7	—
8	—

1 Any pin not referenced on a connector is not connected.

Analog Voice RJ-21 Pinouts

Figure 12 shows the RJ-21 connector wiring for the 50-pin Amphenol cable; Table 18 lists the pinouts.

Figure 12 RJ-21 Connector Wiring

Table 18 Pinouts for FXS and FXO Voice Ports 

Pair	Ring Conductor	Tip Conductor
1	1	26
2	2	27
3	3	28
4	4	29
5	5	30
6	6	31
7	7	32
8	8	33
9	9	34
10	10	35
11	11	36
12	12	37
13	13	38
14	14	39
15	15	40
16	16	41
17	17	42
18	18	43
19	19	44
20	20	45
21	21	46
22	22	47
23	23	48
24	24	49

Serial Connection Signals and Pinouts

This section provides information about the 1-port serial WAN interface card (WIC). With the appropriate serial transition cable, this WIC can provide an EIA/TIA-232, EIA/TIA-449, V.35, X.21, DTE/DCE, EIA-530 DTE, or NRZ/NRZI serial interface.

Types of Serial Cables

Five types of serial cables (also called serial adapter cables or serial transition cables) are available from Cisco Systems:

•EIA/TIA-232 Interface

•EIA/TIA-449 Interface

•V.35 Interface

•X.21 Serial Cable Assembly

•EIA-530 Interface

All serial cables provide a universal plug at the WIC end. The network end of each cable provides the physical connectors most commonly used for the interface. For example, the network end of the EIA/TIA-232 serial cable is a DB-25 connector, the most widely used EIA/TIA-232 connector.

All serial interface types except EIA-530 are available in DTE or DCE format: DTE with a plug connector (male) at the network end and DCE with a receptacle (female) at the network end. V.35 is available in either mode with either gender at the network end. EIA-530 is available in DTE only.

Connecting the WIC to the Network

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Note The serial WIC uses a universal high-density, 60-pin receptacle. Each universal port requires a serial port adapter cable that determines the port's electrical interface type and mode: DTE or DCE. Although all port adapter cables use a universal plug at the serial module end, the network end of each cable type uses the physical connectors commonly used for the interface. (For example, the network end of the EIA/TIA-232 port adapter cable is a DB-25 connector, the most widely used EIA/TIA-232 connector.)

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After you install the serial WIC, use the appropriate serial cable to connect the WIC DB-60 serial port to one of the following types of equipment:

•An asynchronous modem, if connecting to an analog telephone line

•A synchronous modem, data service unit/channel service unit (DSU/CSU), or other data circuit-terminating equipment (DCE), if connecting to a digital WAN line

EIA/TIA-232 Interface

This section contains the following topics:

•EIA/TIA-232 Connections

•EIA/TIA-232 Serial Cable Assembly

EIA/TIA-232 Connections

EIA/TIA-232 supports unbalanced circuits at signal speeds up to 64 kbps. The network end of the adapter cable is a standard 25-pin D-shell connector known as a DB-25. (See Figure 13.) The router console and auxiliary ports also use EIA/TIA-232 connections; however, the serial module ports support synchronous connections, and the console and auxiliary ports support asynchronous connections.

Figure 13 EIA/TIA-232 Adapter Cable Connectors, Network End

EIA/TIA-232 Serial Cable Assembly

Figure 14 shows the EIA/TIA-232 serial cable assembly. Table 19 lists the DTE pinout and Table 20 lists the DCE pinout. Arrows indicate signal direction: —> means DTE to DCE and <— means DCE to DTE.

Figure 14 EIA/TIA-232 Cable Assembly

Table 19 EIA/TIA-232 DTE Cable Pinout (DB-60 to DB-25) 

60-Pin	Signal	Note	Direction	25-Pin	Signal
J1-50 J1-51 J1-52	MODE_0 GND MODE_DCE	Shorting group	—	—	—
J1-46	Shield GND	Single	—	J2-1	Shield GND
J1-46	Shield GND	Single	—	J2-1	Shield GND
J1-41 Shield	TXD/RXD —	Twisted pair no. 5	—> —	J2-2 Shield	TXD —
J1-36 Shield	RXD/TXD —	Twisted pair no. 9	<— —	J2-3 Shield	RXD —
J1-42 Shield	RTS/CTS —	Twisted pair no. 4	—> —	J2-4 Shield	RTS —
J1-35 Shield	CTS/RTS —	Twisted pair no. 10	<— —	J2-5 Shield	CTS —
J1-34 Shield	DSR/DTR —	Twisted pair no. 11	<— —	J2-6 Shield	DSR —
J1-45 Shield	Circuit GND —	Twisted pair no. 1	— —	J2-7 Shield	Circuit GND —
J1-33 Shield	DCD/LL —	Twisted pair no. 12	<— —	J2-8 Shield	DCD —
J1-37 Shield	TXC/NIL —	Twisted pair no. 8