Table Of Contents

Connectors and Connector Pinouts

Cable and Connector Types

ATM Network Connections

E1, CES E1, DS3, E3, and CDS3 Connections

Connecting 75-120-ohm Adapter Cable

E1, CES E1, and E3 Receive Port Capacitor Clips

Connecting the Switch Router to the Wiring Closet Patch Panel

RJ-45 Connector Pinouts

RJ-48c Connector Pinouts

MT-RJ Ethernet Connector Pinouts

96-Pin Molex to 4 Unshielded RJ-45 Connector Pinouts

96-Pin Molex to 12 Unshielded RJ-45 Connector Pinouts

Ethernet Cable Connector Pinouts

Connectors and Connector Pinouts

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This appendix lists the connectors and connector pinouts for the ATM and Layer 3 port adapters and interface modules to an external network. All pins not specifically listed are not connected. This appendix includes the following sections:

• Cable and Connector Types

• ATM Network Connections

• RJ-45 Connector Pinouts

• RJ-48c Connector Pinouts

• MT-RJ Ethernet Connector Pinouts

• 96-Pin Molex to 4 Unshielded RJ-45 Connector Pinouts

• 96-Pin Molex to 12 Unshielded RJ-45 Connector Pinouts

• Ethernet Cable Connector Pinouts

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Note Unless noted otherwise, all information pertains to both the ATM and Layer 3 platforms. Where appropriate, differences between the platforms or individual systems are noted in the text.

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Cable and Connector Types

All interfaces are full duplex. Use the appropriate interface cable and connector to connect multimode, single-mode, or UTP port adapters and interface modules to an external network. For multimode or single-mode fiber-optic traffic, use either SC-type or MT-RJ connectors. Use RJ-45 connectors to connect interfaces to an external network for UTP traffic.

Table B-1 lists cable and connector types for the port adapters and interface modules.

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Warning To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord.

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Table B-1 Port Adapter and Interface Module Connector and CableTypes 

Port Adapter or Interface Module	Connector Type	Cable Type	Number of Ports	System Type
25-Mbps port adapter	96-pin Molex	Category 5 UTP	4 or 12 ports	Catalyst 8510 MSR LightStream 1010 Catalyst 5500
155-Mbps1 port adapter	UTP SC-type	Category 5 UTP Single-mode fiber Single-mode fiber, extended reach plus Single-mode fiber, long reach Multimode fiber	4 ports	Catalyst 8540 MSR Catalyst 8510 MSR LightStream 1010 Catalyst 5500
OC-3c interface module	MT-RJ	Category 5 UTP Single-mode fiber Single-mode fiber, extended reach plus Single-mode fiber, long reach Multimode fiber	16 ports	Catalyst 8540
622-Mbps port adapter	SC-type	Single-mode fiber Single-mode, long reach fiber Multimode fiber	1 port	Catalyst 8540 MSR Catalyst 8510 MSR LightStream 1010 Catalyst 5500
OC-12c interface module	SC-type	Single-mode fiber Single-mode, long reach fiber Multimode fiber	4 ports	Catalyst 8540 MSR
OC-48c interface module	SC-type	Single-mode fiber, intermediate reach Single-mode fiber, long reach	1 or 2 ports	Catalyst 8540 MSR
T1 and E12 , 3 , 4 port adapters	UTP BNC	Category 5 twisted-pair Category 5 twisted-pair and FTP (120 ohms) Coaxial cable (75 ohms)	4 ports	Catalyst 8540 MSR Catalyst 8510 CSR LightStream 1010 Catalyst 5500
T1 and E1 IMA port adapters	UTP RJ-45 BNC	UTP	8 ports	Catalyst 8540 MSR Catalyst 8510 CSR LightStream 1010 Catalyst 5500
CE1 frame relay port adapter	UTP RJ-48c BNC	Category 5 twisted-pair	4 ports	Catalyst 8540 MSR Catalyst 8510 CSR LightStream 1010 Catalyst 5500
CES T1 and E1 2, 3, 4 port adapters	RJ-48c BNC	Category 5 twisted-pair and FTP Category 5 twisted-pair and FTP (120 ohms) Coaxial cable (75 ohms)	4 ports	Catalyst 8540 MSR Catalyst 8510 CSR LightStream 1010 Catalyst 5500
DS3 and E3 port adapters	BNC	RG-59 Coaxial	4 ports	Catalyst 8540 MSR Catalyst 8510 CSR LightStream 1010 Catalyst 5500
CDS3 Frame Relay port adapter	BNC	Coaxial	1 port	Catalyst 8540 MSR Catalyst 8510 CSR LightStream 1010 Catalyst 5500
Enhanced Catalyst 8540 ATM router module	—	—	2 internal ports	Catalyst 8540 MSR
Catalyst 8540 ATM router module	—	—	2 internal ports	Catalyst 8540 MSR
ATM router module	—	—	1 internal port	Catalyst 8510 MSR
Eight-port Gigabit Ethernet	SC-type	Multimode fiber	8 fiber ports	Catalyst 8540
Two-port Gigabit Ethernet	SC-type	Multimode fiber	2 fiber ports
Two-port enhanced Gigabit Ethernet	SC-type	Multimode fiber	2 fiber ports
10/100BASE-T	UTP RJ-45	Category 5 UTP	16 UTP ports	Catalyst 8540
100BASE-FX	MT-RJ	Multimode fiber	16 fiber ports	Catalyst 8540
Packet-over-SONET OC-12c uplink with enhanced Gigabit Ethernet	SC-type	Multimode for Gigabit Ethernet or single-mode fiber for POS	2 fiber ports	Catalyst 8540
ATM OC-12c and OC-3c uplink with enhanced Gigabit Ethernet	SC-type	Multimode or single-mode fiber	2 fiber ports
One-port Gigabit Ethernet	SC-type	Multimode fiber	1 fiber port	Catalyst 8510 LightStream 1010
10/100BASE-T	RJ-45	Category 5 UTP	8 UTP ports	Catalyst 8510 CSR
100BASE- FX	MT-RJ	Multimode fiber	8 fiber ports	Catalyst 8510 CSR

1 Table B-2 lists the signals for 155-Mbps UTP port adapters using RJ-45 connectors. 2 For T1/E1 and CES T1/E1 port adapters, use the RJ-45 connector to connect the port adapter with an external T1 channel service unit (CSU). 3 Cabling T1/E1 and CES T1/E1 port adapters outside of the United States and Canada requires FTP cabling to meet EMI requirements. 4 Table B-3 lists the signals for T1/E1 and CES T1/E1 port adapters using RJ-45 connectors.

ATM Network Connections

This section provides descriptions and examples of network connections used by ATM port adapters and interface modules to connect to an external network.

E1, CES E1, DS3, E3, and CDS3 Connections

For E1, CES E1, DS3, E3, and CDS3 connections, use the 75-ohm and 120-ohm (120 ohms in the RJ cables) RG-59 coaxial cable. It uses bayonet-style, twist-lock (BNC) connectors to connect the port adapters with external ATM switch routers. (See Figure B-1.)

Figure B-1 Coaxial Interface Cable and BNC Connectors

You can use a 75-120-ohm adapter cable to obtain 75-ohm E1 BNC connections on 120-ohm E1 port adapters. The adapter uses an eight-pin RJ-48c connector on the 120-ohm side and dual BNC coax connectors (transmit and receive) on the 75-ohm side. (See Figure B-2.)

Figure B-2 75-120-ohm Adapter Cable

The 120-ohm E1 ports of your port adapter connect to the 75-120-ohm adapter cable using RJ-48c connectors and Category 3 or Category 5 FTP cable with 120-ohm impedance. (See Figure B-3.)

Figure B-3 E1 Port Adapter Interface Cable and RJ-48c Connector

Connecting 75-120-ohm Adapter Cable

To connect the 75-120-ohm adapter cable between the port adapter and the 75-ohm unbalanced G.703 line (see Figure B-4), follow these steps:

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Step 1 Attach the Category 3 or Category 5 FTP cable directly to the RJ-48c port on the 120-ohm E1 port adapter.

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Note To comply with CE marking requirements, use FTP cable with 120-ohm impedance.

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Step 2 Attach the network end of your Category 3 or Category 5 cable to the 75-120-ohm adapter cable.

Step 3 Attach the BNC connector of the 75-120-ohm adapter cable marked receive to the network device connector marked transmit.

Step 4 Attach the BNC connector of the 75-120-ohm adapter cable marked transmit to the network device connector marked receive.

Figure B-4 Connecting a 75-120-ohm Adapter Cable to a 120-ohm E1 Port Adapter

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E1, CES E1, and E3 Receive Port Capacitor Clips

This section discusses how to limit the electromagnetic interference (EMI) susceptibility of the E1, CES E1, and E3 BNC connections. Networking equipment is subject to problems due to the following EMI factors:

•Loss of grounding integrity

•EMI radiation from the port adapter or other installed boards

•A circuit's susceptibility to EMI radiated from other sources

A capacitor clip is available for use with BNC connectors to reduce the emissions radiated from the receive (RX) port. (See Figure B-5.)

The capacitor clip has two spring-loaded clamps so that you can secure the device over the mated BNC connectors on each RX port of a BNC connector. Detail A of Figure B-5 shows how to install these clips.

Figure B-5 E1 Jumpers and Capacitor Clips for a CES E1 Port Adapter with BNC Connectors

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Caution Compliance with European certification standards is contingent upon the use of these capacitor clips on port adapters with BNC connectors.

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Note These capacitor clips do not ship with port adapters. The Cisco Sytems capacitor clip, part number CLP-ATM-EMI-BNC-E=, is no longer available from Cisco but, comparable clips are available from multiple vendors.

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Connecting the Switch Router to the Wiring Closet Patch Panel

To connect the switch router to the wiring closet patch panel using 25-Mbps port adapter connections, use the special 96-pin Molex connector with either the 4 RJ-45 multileg cable or the 12 RJ-45 multileg cable. (See Figure B-6.)

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Caution To avoid receiving erroneous failure messages, allow at least 15 seconds for the system to reinitialize. Note the current configuration of all interfaces before you remove or insert another port adapter.

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Figure B-6 25-Mbps Multiple Connection Cable

RJ-45 Connector Pinouts

Table B-2 lists the signals for RJ-45 cable connectors. Figure B-7 shows the RJ-45 connector.

Table B-2 RJ-45 Connector Pinouts 

Pin	Signal	Description
1	RXD+	Receive data +
2	RXD-	Receive data -
3	NC	No connection
4	NC	No connection
5	NC	No connection
6	NC	No connection
7	TXD+	Transmit data +
8	TXD-	Transmit data -

Figure B-7

RJ-45 and RF-48c Connector

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Note For additional information, refer to the ATM Forum Physical Medium Specification for 155-Mbps Over Twisted-Pair Cable publication.

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Note The terms RJ-45 and RJ-48c are sometimes used interchangeably. The RJ-45 is the plug; the RJ-48c is the jack or receptacle.

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RJ-48c Connector Pinouts

Table B-3 lists the signals for RJ-48c connectors. Figure B-7 shows an RJ-48c connector.

Table B-3 RJ-48c Connector Pinouts 

Pin	Description
1	Receive ring
2	Receive tip
3	No connection
4	Transmit ring
5	Transmit tip
6	No connection
7	No connection
8	No connection

Figure B-8

RJ-48c Connector and RJ-45 Cable

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Note The terms RJ-45 and RJ-48c are sometimes used interchangeably. The RJ-45 is the plug; the RJ-48c is the jack or receptacle.

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MT-RJ Ethernet Connector Pinouts

The Ethernet ports on the 100BASE-FX interface module for the Catalyst 8540 CSR are MT-RJ receptacles. Table B-4 lists the MT-RJ Ethernet cable connector pinouts.

Table B-4 MT-RJ Ethernet Cable Connector Pinouts

Pin	Signal	Direction	Description
1	VeeRX	—	Receiver signal ground
2	VccRX	<—	Receive power supply
3	SD	—	Signal Detect
4	RD-	<—	Receiver data-
5	RD+	<—	Receiver data+
6	VccTX	—>	Transmit power supply
7	VeeTX	—>	Transmit signal ground
8	Tdis	—	Transmit disable
9	TD+	—>	Transmit data+
10	TD-	—>	Transmit data-

Figure B-9

MT-RJ Cable Connector

96-Pin Molex to 4 Unshielded RJ-45 Connector Pinouts

The four-port 25-Mbps port adapter supports a 96-pin Molex to 4 unshielded RJ-45 connector. Table B-5 lists the signals for the 96-pin Molex connector.

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Note The 4 unshielded RJ-45 connectors do not utilize all 96 pins on the 96-pin Molex connector. Table B-5 does not list the Molex connector pins that are not used.

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Table B-5 96-Pin Molex to 4 Unshielded RJ-45 Connector Pinouts 

Signal	Molex Pin No.	RJ-45 Port No.	RJ-45 Pin No.	Description
RXA7	9	1	1	Receive data +
RXB7	10	1	2	Receive data -
GND	11	NC	NC	No connection
GND	12	NC	NC	No connection
TXA7	13	1	7	Transmit data +
TXB7	14	1	8	Transmit data -
GND	15	NC	NC	No connection
GND	16	NC	NC	No connection
RXA6	33	0	1	Receive data +
RXB6	34	0	2	Receive data -
GND	35	NC	NC	No connection
GND	36	NC	NC	No connection
TXA6	37	0	7	Transmit data +
TXB6	38	0	8	Transmit data -
GND	39	NC	NC	No connection
GND	40	NC	NC	No connection
RXA9	65	3	1	Receive data +
RXB9	66	3	2	Receive data -
GND	67	NC	NC	No connection
GND	68	NC	NC	No connection
TXA9	69	3	7	Transmit data +
TXB9	70	3	8	Transmit data -
GND	71	NC	NC	No connection
GND	72	NC	NC	No connection
RXA8	73	2	1	Receive data +
RXB8	74	2	2	Receive data -
GND	75	NC	NC	No connection
GND	76	NC	NC	No connection
TXA8	77	2	7	Transmit data +
TXB8	78	2	8	Transmit data -
GND	79	NC	NC	No connection
GND	80	NC	NC	No connection

Figure B-10

RJ-45 Connectors with a 96-Pin Molex Connector

96-Pin Molex to 12 Unshielded RJ-45 Connector Pinouts

The 12-port 25-Mbps port adapter supports a 96-pin Molex to 12 unshielded RJ-45 connector. Table B-6 lists the signals for the 96-pin Molex connector.

Table B-6 96-Pin Molex to 12 Unshielded RJ-45 Connector Pinouts 

Signal	Molex Pin No.	RJ-45 Port No.	RJ-45 Pin No.	Description
RXA3	1	3	1	Receive data +
RXB3	2	3	2	Receive data -
GND	3	NC	NC	No connection
GND	4	NC	NC	No connection
TXA3	5	3	7	Transmit data +
TXB3	6	3	8	Transmit data -
GND	7	NC	NC	No connection
GND	8	NC	NC	No connection
RXA7	9	7	1	Receive data +
RXB7	10	7	2	Receive data -
GND	11	NC	NC	No connection
GND	12	NC	NC	No connection
TXA7	13	7	7	Transmit data +
TXB7	14	7	8	Transmit data -
GND	15	NC	NC	No connection
GND	16	NC	NC	No connection
RXA11	17	11	1	Receive data +
RXB11	18	11	2	Receive data -
GND	19	NC	NC	No connection
GND	20	NC	NC	No connection
TXA11	21	11	7	Transmit data +
TXB11	22	11	8	Transmit data -
GND	23	NC	NC	No connection
GND	24	NC	NC	No connection
RXA10	25	10	1	Receive data +
RXB10	26	10	2	Receive data -
GND	27	NC	NC	No connection
GND	28	NC	NC	No connection
TXA10	29	10	7	Transmit data +
TXB10	30	10	8	Transmit data -
GND	31	NC	NC	No connection
GND	32	NC	NC	No connection
RXA6	33	6	1	Receive data +
RXB6	34	6	2	Receive data -
GND	35	NC	NC	No connection
GND	36	NC	NC	No connection
TXA6	37	6	7	Transmit data +
TXB6	38	6	8	Transmit data -
GND	39	NC	NC	No connection
GND	40	NC	NC	No connection
TXB2	41	2	8	Transmit data -
TXA2	42	2	7	Transmit data +
GND	43	NC	NC	No connection
GND	44	NC	NC	No connection
RXB2	45	2	2	Receive data -
RXA2	46	2	1	Receive data +
GND	47	NC	NC	No connection
RXA6	48	NC	NC	No connection
RXA1	49	1	1	Receive data +
RXB1	50	1	2	Receive data -
GND	51	NC	NC	No connection
GND	52	NC	NC	No connection
TXA1	53	1	7	Transmit data +
TXB1	54	1	8	Transmit data -
GND	55	NC	NC	No connection
GND	56	NC	NC	No connection
RXA4	57	4	1	Receive data +
RXB4	58	4	2	Receive data -
GND	59	NC	NC	No connection
GND	60	NC	NC	No connection
TXA4	61	4	7	Transmit data +
TXB4	62	4	8	Transmit data -
GND	63	NC	NC	No connection
GND	64	NC	NC	No connection
RXA9	65	9	1	Receive data +
RXB9	66	9	2	Receive data -
GND	67	NC	NC	No connection
GND	68	NC	NC	No connection
TXA9	69	9	7	Transmit data +
TXB9	70	9	8	Transmit data -
GND	71	NC	NC	No connection
GND	72	NC	NC	No connection
RXA8	73	8	1	Receive data +
RXB8	74	8	2	Receive data -
GND	75	NC	NC	No connection
GND	76	NC	NC	No connection
TXA8	77	8	7	Transmit data +
TXB8	78	8	8	Transmit data -
GND	79	NC	NC	No connection
GND	80	NC	NC	No connection
TXB5	81	5	8	Transmit data -
TXA5	82	5	7	Transmit data +
GND	83	NC	NC	No connection
GND	84	NC	NC	No connection
RXB5	85	5	2	Receive data -
RXA5	86	5	1	Receive data +
GND	87	NC	NC	No connection
GND	88	NC	NC	No connection
TXB0	89	0	8	Transmit data -
TXA0	90	0	7	Transmit data +
GND	91	NC	NC	No connection
GND	92	NC	NC	No connection
RXB0	93	0	2	Receive data -
RXA0	94	0	1	Receive data +
GND	95	NC	NC	No connection
GND	96	NC	NC	No connection

Figure B-11

RJ-45 Connectors with a 96-Pin Molex Connector

Ethernet Cable Connector Pinouts

The Ethernet ports on the route processor and the 10/100BASE-T interface module are RJ-45 receptacles. Table B-7 lists the Ethernet cable connector pinouts.

Table B-7 RJ-45 Ethernet Cable Connector Pinouts

Pin	Signal	Direction	Description
1	RxD+	<—	Receive data +
2	RxD-	<—	Receive data -
3	NC	—	No connection
4	NC	—	No connection
5	NC	—	No connection
6	NC	—	No connection
7	TxD+	—>	Transmit data+
8	TxD-	—>	Transmit data -

Figure B-12

RJ-45 and RJ-48c Cable Connector

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Note To connect a Catalyst 8540 CSR chassis to a router (such as the Cisco 7500 router) use a straight-through unshielded twisted pair (UTP) cable. To connect the chassis to a switch (such as the Catalyst 5500 switch), use a crossover UTP cable.

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Figure B-13

SC-Type Fiber Connector Cable

155-Mbps port adapter, the 622-Mbps port adapter, the OC-12c, and the OC-48c interface module with the external connection for SC-Types