Cabling Specifications

This appendix lists the pinouts for ports on the RP (or RSP7000), EIP, TRIP, FIP optical bypass switch, and MIP for the serial interface cables that connect each FSIP and HSSI port to the external network.

All pins not specifically listed are not connected.

Following is a list of the signal summaries contained in this appendix:

RP (and RSP7000) console port signals
RP (and RSP7000) auxiliary port signals
Interface processor port signals and interface cable pinouts
- EIP Ethernet AUI pinout
- TRIP Token Ring pinout
- FIP FDDI optical bypass switch pinout
- EIA/TIA-232 DTE and DCE serial port adapter cable pinouts
- EIA/TIA-449 DTE and DCE serial port adapter cable pinouts
- V.35 DTE and DCE serial port adapter cable pinouts
- X.21 DTE and DCE serial port adapter cable pinouts
- EIA-530 DTE serial port adapter cable pinout
- E1-G.703/G.704 serial port adapter cable pinouts
HSSI cables
- HSSI interface cable pinout
- Null modem cable pinout
MIP cables

Note All FSIP ports use a universal high-density, 60-pin receptacle (except for the E1-G.703/G.704 port adapter, which uses DB-15 connectors). Each universal port requires a serial port adapter cable, which determines the port's electrical interface type and mode: DTE or DCE. Although all port adapter cables use a universal plug at the FSIP 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, the most widely used EIA/TIA-232 connector.)

Console Port Signals

The console port on the RP (and RSP7000) is an EIA/TIA-232, DCE, DB-25 receptacle. Both DSR and DCD are active when the system is running. The RTS signal tracks the state of the CTS input. The console port does not support modem control or hardware flow control. Table A-1 lists the signals used on this port. The console port requires a straight-through EIA/TIA-232 cable.

Table A-1: Console Port Signals

Pin	Signal	Direction	Description
1	GND	-	Ground
2	TxD	<--	Transmit Data
3	RxD	-->	Receive Data
6	DSR	-->	Data Set Ready (always on)
7	GND	-	Ground
8	DCD	-->	Data Carrier Detect (always on)

Auxiliary Port Signals

The auxiliary port on the RP (and RSP7000) is an EIA/TIA-232 DTE, DB-25 plug to which you can attach a CSU/DSU or other equipment in order to access the router from the network. Table A-2 lists the EIA/TIA-232 signals used on this port.

The auxiliary port supports hardware flow control and modem control.

Table A-2: Auxiliary Port Signals

Pin	Signal	Direction	Description
2	TxD	-->	Transmit Data
3	RxD	<--	Receive Data
4	RTS	-->	Request To Send (used for hardware flow control)
5	CTS	<--	Clear To Send (used for hardware flow control)
6	DSR	<--	Data Set Ready
7	Signal Ground	-	Signal Ground
8	CD	<--	Carrier Detect (used for modem control)
20	DTR	-->	Data Terminal Ready (used for modem control only)

Ethernet Connector Signals

Most Ethernet transceivers require an attachment unit interface (AUI) or transceiver cable to connect an Ethernet transceiver to the EIP Ethernet ports. Some unshielded twisted-pair (10BaseT) transceivers are compact enough to connect directly to the EIP ports without impeding other connections. For descriptions of Ethernet transceivers, connectors, and cables, refer to the section "Ethernet Connection Equipment" in the chapter "Preparing for Installation."

Table A-3 lists the signals for the 15-pin Ethernet connector used on the EIP.

Table A-3: Ethernet Connector Signals

Pin	Circuit	Description
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 used)
15	CO-B	Control Out Circuit B (not used)
8	CO-S	Control Out Circuit Shield (not used)
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
Shell	PG	Protective Ground

Fast Ethernet Connector Signals

The two connectors on the FEIP are a single MII, 40-pin, D-shell type, and a single RJ-45. You can use either one or the other. Only one connector can be used at one time. Each connection supports IEEE 802.3u interfaces compliant with the 100BaseX and 100BaseT standards. The RJ-45 connection does not require an external transceiver; however, the MII connection does.

The RJ-45 modular connector has strain-relief functionality incorporated into the design of its standard plastic connector.Table A-4 and Table A-5 list the pinouts and signals for the RJ-45 and MII connectors.

Table A-4: FEIP Port Adapter RJ-45 Connector Pinout

Pin	Description
1	Receive Data + (RxD+)
2	RxD-
3	Transmit Data + (TxD+)
6	TxD-

Note Referring to the RJ-45 pinout in Table A-4, proper common-mode line terminations should be used for the unused Category 5, UTP cable pairs 4/5 and 7/8. Common-mode termination reduces the contributions to electromagnetic interference (EMI) and susceptibility to common-mode sources. Wire pairs 4/5 and 7/8 are actively terminated in the RJ-45, 100BaseTX port circuitry in the FEIP port adapter.

Table A-5: FEIP Port Adapter MII Connector Pinout

Pin¹	In	Out	I/O	Description
14-17	-	Yes	-	Transmit Data (TxD)
12	Yes	-	-	Transmit Clock (Tx_CLK)¹
11	-	Yes	-	Transmit Error (Tx_ER)
13	-	Yes	-	Transmit Enable (Tx_EN)
3	-	Yes	-	MII Data Clock (MDC)
4-7	Yes	-	-	Receive Data (RxD)
9	Yes	-	-	Receive Clock (Rx_CLK)
10	Yes	-	-	Receive Error (Rx_ER)
8	Yes	-	-	Receive Data Valid (Rx_DV)
18	Yes	-	-	Collision (COL)
19	Yes	-	-	Carrier Sense (CRS)
2	-	-	Yes	MII Data Input/Output (MDIO)
22-39	-	-	-	Common (ground)
1, 20, 21, 40	-	-	-	+5.0 volts (V)

¹ Tx_CLK and Rx_CLK are provided by the external transceiver.

Token Ring Port Signals

A network interface cable provides the connection between the 9-pin Token Ring connectors on the TRIP and a media access unit (MAU). The 9-pin connector at the TRIP end, and the MAU connector at the network end, are described in "Token Ring Connection Equipment" in the chapter "Preparing for Installation." Table A-6 lists the signals for the DB-9 Token Ring connector used on the TRIP.

Table A-6: Token Ring Connector Signals

Pin	Signal
1	Ring-In B
5	Ring-Out A
6	Ring-In A
9	Ring-Out B
10 and 11	Ground

FDDI Optical Bypass Switch Signals

Table A-5 lists the signal descriptions for the mini-DIN optical bypass switch available on the multimode/multimode FIP (CX-FIP-MM) and single-mode/single-mode FIP (CX-FIP-SS). The mini-DIN-to-DIN adapter cable (CAB-FMDD) allows connection to an optical bypass switch that uses a DIN connector (which is larger than the mini-DIN on the FIP). For descriptions of FDDI network configurations and equipment, refer to the section "FDDI Connection Equipment" in the chapter "Preparing for Installation" and to the section "FDDI Connections" in the chapter "Installing the Router."

Table A-7: Optical Bypass Switch Pinout

Pin	Description
1	+5V to secondary switch
2	+5V to primary switch
3	Ground to enable primary switch
4	Ground to enable secondary switch
5	Sense circuit--1 kohm to +5V
6	Ground--Sense circuit return

Serial Adapter Cable Pinouts

The FSIP supports EIA/TIA-232, EIA/TIA-449, X.21, V.35, and EIA-530 serial interfaces.

All FSIP ports use a universal port adapter, which is a 60-pin receptacle that supports all available interface types. (The exception to this is the E1-G.703/G.704 port adapter, which uses a DB-15 connector.) A special serial adapter cable, which is required for each port, determines the electrical interface type and mode of the interface. The router (FSIP) end of all of the adapter cables is a 60-pin plug; the connectors at the network end are the standard connectors used for the respective interfaces.

All interface types except EIA-530 are available in DTE or DCE format: DTE with a plug connector at the network end and DCE with a receptacle 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.

The tables that follow list the signal pinouts for both the DTE and DCE mode serial port adapter cables for each FSIP interface type. For descriptions of serial interface connection and equipment, refer to the section "Serial Connection Equipment" in the chapter "Preparing for Installation" and to the section "Serial Connections" in the chapter "Installing the Router."

Table A-8: EIA/TIA-232 Adapter Cable Signals

FSIP End, HD 60-Position Plug	DTE Cable			Network End, DB-25 Plug	FSIP End, HD 60-Position Plug	DCE Cable			Network End, DB-25 Receptacle
Signal (J1)	Pin		Pin	Signal (J2)	Signal (J1)	Pin		Pin	Signal (J2)
Shield ground	46		1	Shield ground	Shield ground	46		1	Shield ground
TxD/RxD Not used	41 56	-->	2 7	TxD Not used	RxD/TxD Not used	36 56	<--	2 7	TxD Not used
RxD/TxD Not used	36 56	<--	3 7	RxD Not used	TxD/RxD Not used	41 56	-->	3 7	RxD Not used
RTS/CTS Not used	42 56	-->	4 7	RTS Not used	CTS/RTS Not used	35 56	<--	4 7	RTS Not used
CTS/RTS Not used	35 56	<--	5 7	CTS Not used	RTS/CTS Not used	42 56	-->	5 7	CTS Not used
DSR/DTR Not used	34 56	<--	6 7	DSR Not used	DTR/DSR Not used	43 56	-->	6 7	DSR Not used
Circuit ground Not used	45 56		7 7	Circuit ground Not used	Circuit ground Not used	45 56		7 7	Circuit ground Not used
DCD/LL Not used	33 56	<--	8 7	DCD Not used	LL/DCD Not used	44 56	-->	8 7	DCD Not used
TxC/NIL Not used	37 56	<--	15 7	TxC Not used	TxCE/TxC Not used	39 56	-->	15 7	TxC Not used
RxC/TxCE Not used	38 56	<--	17 7	RxC Not used	NIL/RxC Not used	40 56	-->	17 7	RxC Not used
LL/DCD Not used	44 56	-->	18 7	LTST Not used	DCD/LL Not used	33 56	<--	18 7	LTST Not used
DTR/DSR Not used	43 56	-->	20 7	DTR Not used	DSR/DTR Not used	34 56	<--	20 7	DTR Not used
TxCE/TxC Not used	39 56	-->	24 7	TxCE Not used	RxC/TxCE Not used	38 56	<--	24 7	TxCE Not used
Mode 0 Ground Mode_DCE	50 51 52			Shorting group	Mode 0 Ground	50 51			Shorting group

Table A-9: EIA/TIA-449 Adapter Cable Signals

FSIP End, HD 60-Position Plug	DTE Cable			Network End, DB-37 Plug	FSIP End, HD 60-Position Plug	DCE Cable			Network End, DB-37 Receptacle
Signal (J1)	Pin		Pin	Signal (J2)	Signal (J1)	Pin		Pin	Signal (J2)
Shield ground	46		1	Shield ground	Shield ground	46		1	Shield ground
TxD/RxD+ TxD/RxD-	11 12	--> -->	4 22	SD+ SD-	RxD/TxD+ RxD/TxD-	28 27	<-- <--	4 22	SD+ SD-
TxC/RxC+ TxC/RxC-	24 23	<-- <--	5 23	ST+ ST-	TxCE/TxC+ TxCE/TxC-	13 14	--> -->	5 23	ST+ ST-
RxD/TxD+ RxD/TxD-	28 27	<-- <--	6 24	RD+ RD-	TxD/RxD+ TxD/RxD-	11 12	--> -->	6 24	RD+ RD-
RTS/CTS+ RTS/CTS-	9 10	--> -->	7 25	RS+ RS-	CTS/RTS+ CTS/RTS-	1 2	<-- <--	7 25	RS+ RS-
RxC/TxCE+ RxC/TxCE-	26 25	<-- <--	8 26	RT+ RT-	TxC/RxC+ TxC/RxC-	24 23	--> -->	8 26	RT+ RT-
CTS/RTS+ CTS/RTS-	1 2	<-- <--	9 27	CS+ CS-	RTS/CTS+ RTS/CTS-	9 10	--> -->	9 27	CS+ CS-
LL/DCD Circuit ground	44 45	--> -->	10 37	LL SC	NIL/LL Circuit ground	29 30	--> -->	10 37	LL SC
DSR/DTR+ DSR/DTR-	3 4	<-- <--	11 29	DM+ DM-	DTR/DSR+ DTR/DSR-	7 8	--> -->	11 29	DM+ DM-
DTR/DSR+ DTR/DSR-	7 8	--> -->	12 30	TR+ TR-	DSR/DTR+ DSR/DTR-	3 4	<-- <--	12 30	TR+ TR-
DCD/DCD+ DCD/DCD-	5 6	<-- <--	13 31	RR+ RR-	DCD/DCD+ DCD/DCD-	5 6	--> -->	13 31	RR+ RR-
TxCE/TxC+ TxCE/TxC-	13 14	--> -->	17 35	TT+ TT-	RxC/TxCE+ RxC/TxCE-	26 25	<-- <--	17 35	TT+ TT-
Circuit ground Circuit ground	15 16		19 20	SG RC	Circuit ground Circuit ground	15 16		19 20	SG RC
Mode 1 Ground	49 48			Shorting group	Mode 1 Ground	49 48			Shorting group
Ground Mode_DCE	51 52			Shorting group

Table A-10: X.21 Adapter Cable Signals

FSIP End, HD 60-Position Plug	DTE Cable			Network End, DB-15 Plug	SIP End, HD 60-Position Plug	DCE Cable			Network End, DB-15 Receptacle
Signal (J1)	Pin		Pin	Signal (J2)	Signal (J1)	Pin		Pin	Signal (J2)
Ground	46		1		Shield ground	46		1	Shield ground
TxD/RxD+ TxD/RxD-	11 12	--> -->	2 9	Transmit+ Transmit-	RxD/TxD+ RxD/TxD-	28 27	<-- <--	2 9	Transmit+ Transmit-
RTS/CTS+ RTS/CTS -	9 10	--> -->	3 10	Control+ Control-	CTS/RTS+ CTS/RTS -	1 2	<-- <--	3 10	Control+ Control-
RxD/TxD+ RxD/TxD-	28 27	<-- <--	4 11	Receive+ Receive-	TxD/RxD+ TxD/RxD-	11 12	--> -->	4 11	Receive+ Receive-
CTS/RTS+ CTS/RTS -	1 2	<-- <--	5 12	Indication+ Indication-	RTS/CTS+ RTS/CTS-	9 10	--> -->	5 12	Indication+ Indication-
RxC/TxCE+ RxC/TxCE-	26 25	<-- <--	6 13	Timing+ Timing-	TxC/RxC+ TxC/RxC -	24 23	--> -->	6 13	Timing+ Timing-
Circuit ground	15		8	Circuit ground	Circuit ground	15		8	Circuit ground
Ground Mode_2	48 47			Shorting group	Ground Mode_2	48 47			Shorting group
Ground Mode_DCE	51 52			Shorting group
Not used	16		8	Not used	Not used	16		8	Not used

Table A-11: V.35 Adapter Cable Signals

FSIP End, HD 60-Position Plug	DTE Cable			Network End, 34-Position Plug	FSIP End, HD 60-Position Plug	DCE Cable			Network End, 34-Position Receptacle
Signal (J1)	Pin		Pin	Signal (J2)	Signal (J1)	Pin		Pin	Signal (J2)
Shield ground	46		A	Shield ground	Shield ground	46		A	Shield ground
Circuit ground Not used	45 16		B B	Circuit ground Not used	Circuit ground Not used	45 18		B B	Circuit ground Not used
RTS/CTS Not used	42 16	-->	C B	RTS Not used	CTS/RTS Not used	35 18	<--	C B	RTS Not used
CTS/RTS Not used	35 16	<--	D B	CTS Not used	RTS/CTS Not used	42 18	-->	D B	CTS Not used
DSR/DTR Not used	34 16	<--	E B	DSR Not used	DTR/DSR Not used	43 18	-->	E B	DSR Not used
DCD/LL Not used	33 16	<--	F B	RLSD Not used	LL/DCD Not used	44 18	-->	F B	RLSD Not used
DTR/DSR Not used	43 16	-->	H B	DTR Not used	DSR/DTR Not used	34 18	<--	H B	DTR Not used
LL/DCD Not used	44 16	-->	K B	LT Not used	DCD/LL Not used	33 18	<--	K B	LT Not used
TxD/RxD+ TxD/RxD-	18 17	--> -->	P S	SD+ SD-	RxD/TxD+ RxD/TxD-	28 27	<-- <--	P S	SD+ SD-
RxD/TxD+ RxD/TxD-	28 27	<-- <--	R T	RD+ RD-	TxD/RxD+ TxD/RxD-	18 17	--> -->	R T	RD+ RD-
TxCE/TxC+ TxCE/TxC-	20 19	--> -->	U W	SCTE+ SCTE-	RxC/TxCE+ RxC/TxCE-	26 25	<-- <--	U W	SCTE+ SCTE-
RxC/TxCE+ RxC/TxCE-	26 25	<-- <--	V X	SCR+ SCR-	NIL/RxC+ NIL/RxC-	22 21	--> -->	V X	SCR+ SCR-
TxC/RxC+ TxC/RxC-	24 23	<-- <--	Y AA	SCT+ SCT-	TxCE/TxC+ TxCE/TxC-	20 19	--> -->	Y AA	SCT+ SCT-
Mode 1 Ground	49 48			Shorting group	Mode 1 Ground	49 48			Shorting group
Mode 0 Ground Mode_DCE	50 51 52			Shorting group	Mode 0 Ground	50 51			Shorting group
TxC/NIL RxC/TxCE RxC/TxD Ground	53 54 55 56			Shorting group	TxC/NIL RxC/TxCE RxC/TxD Ground	53 54 55 56			Shorting group

Table A-12: EIA-530 Adapter Cable Signals

FSIP End, HD 60-Position Plug	DTE Cable¹			Network End, DB-25 Plug
Signal (J1)	Pin		Pin	Signal (J2)
Shield ground	46		1	Shield ground
TxD/RxD+ TxD/RxD-	11 12	--> -->	2 14	TxD+ TxD-
RxD/TxD+ RxD/TxD-	28 27	<-- <--	3 16	RxD+ RxD-
RTS/CTS+ RTS/CTS-	9 10	--> -->	4 19	RTS+ RTS-
CTS/RTS+ CTS/RTS-	1 2	<-- <--	5 13	CTS+ CTS-
DSR/DTR+ DSR/DTR-	3 4	<-- <--	6 22	DSR+ DSR-
DCD/DCD+ DCD/DCD-	5 6	<-- <--	8 10	DCD+ DCD-
TxC/RxC+ TxC/RxC-	24 23	<-- <--	15 12	TxC+ TxC-
RxC/TxCE+ RxC/TxCE-	26 25	<-- <--	17 9	RxC+ RxC-
LL/DCD Circuit ground	44 45	-->	18 7	LL Circuit ground
DTR/DSR+ DTR/DSR-	7 8	--> -->	20 23	DTR+ DTR-
TxCE/TxC+ TxCE/TxC-	13 14	--> -->	24 11	TxCE+ TxCE-
Mode_1 Ground Mode_2	49 48 47			Shorting group
Ground Mode_DCE	51 52			Shorting group
Not used Not used	15 16		7 7	Not used Not used

¹ For EIA-530, DCE mode is not available.

Table A-13 shows the signal pinouts for each type of E1-G.703/G.704 interface cable. All cables use a 15-pin D-shell (DB-15) connector at the FSIP end.

Table A-13: E1-G.703/G.704 Adapter Cable Connector Pinouts

FSIP End		Network End
DB-15¹		DB-15	Null Modem DB-15	BNC	Twinax
Pin	Signal²	Pin	Pin	Signal	Pin	Signal
9	Tx tip	1	3	Tx tip	J2-1	Tx
2	Tx ring	9	11	Tx shield	J2-2	Tx
10	Tx shield	2	4	-	J2 shield	Tx shield
8	Rx tip	3	1	Rx tip	J3-1	Rx
15	Rx ring	11	9	Rx shield	J3-2	Rx
7	Rx shield	4	2	-	J3 shield	Rx shield

¹ Any pins not described in this table are not connected.
² Tx = transmit. Rx = receive.

HSSI Connector Signals

Two types of cables are available for use with the HIP: the HSSI interface cable used to connect the HIP HSSI port with an external DSU (and HSSI network) and a null modem cable, which allows you to connect two collocated routers back to back.

HSSI Interface Cable

The HSSI interface cable (Product Number CAB-HSI1) connects the HIP port with an external DSU. The cable comprises 25 twisted pairs and a 50-pin SCSI-II-type plug at each end. Although the HSSI cable is similar to a SCSI-II cable, it is not identical; you cannot substitute a SCSI-II cable for a HSSI interface cable. (See the following Caution.) Table A-14 lists the pin signals for the connector.

Caution Although the HIP connector and the HSSI interface cable are similar to SCSI-II format, the HSSI cable specification is more stringent than that for a SCSI-II. We cannot guarantee proper operation if a SCSI-II cable is used instead of an HSSI interface cable.

Table A-14: HSSI Interface Cable Signals

Signal Name	Pin No., + Side (Router End)	Direction¹	Pin No., - Side (DSU End)
SG - Signal Ground	1	--	26
RT - Receive Timing	2	<--	27
CA - DCE Available	3	<--	28
RD - Receive Data Reserved	4	<--	29
LC - Loopback Circuit C	5	<--	30
ST - Send Timing	6	<--	31
SG - Signal Ground	7	--	32
TA - DTE Available	8	-->	33
TT - Terminal Timing	9	-->	34
LA - Loopback Circuit A	10	-->	35
SD - Send Data	11	-->	36
LB - Loopback Circuit B	12	-->	37
SG - Signal Ground	13	--	38
5 - Ancillary to DCE	14-18	-->	39-43
SG - Signal Ground	19	--	44
5 - Ancillary from DCE	20-24	<--	45-49
SG - Signal Ground	25	--	50

¹ Router is + side (DTE). DSU is - side (DCE).

Null Modem Cable

The null modem cable (CAB-HNUL) can connect two routers directly back to back. The two routers must be in the same location and can be two Cisco 7000 series, two AGS+ routers, or one of each. A null modem connection allows you to verify the operation of the HSSI or to link the routers directly in order to build a larger node.

The null modem cable uses the same 50-pin connectors as the HSSI interface cable, but uses the pinouts listed in Table A-15. For null modem cable connection and configuration instructions, refer to the section "HSSI Connection Equipment" in the chapter "Preparing for Installation."

Table A-15: HSSI Null Modem Cable Signals

Signal Name	From Pins	Direction	To Pins	Signal Name
Receive Timing	2, 27	-->	9, 34	Terminal Timing
DCE Available	3, 28	-->	8, 33	DTE Available
Received Date	4, 29	-->	11, 36	Send Data
Loopback C	5, 30	-->	10, 35	Loopback A
Send Timing	6, 31	-->	6, 31	Send Timing
DTE Available	8, 33	-->	3, 28	DCE Available
Terminal Timing	9, 34	-->	2, 27	Receive Timing
Loopback A	10, 35	-->	5, 30	Loopback C
Send Data	11, 36	-->	4, 29	Receive Data
Ground	1, 26, 7, 32, 13, 38, 19, 44, 25, 50		1, 26, 7, 32, 13, 38, 19, 44, 25, 50	Ground
Loopback (not connected)	12, 37
			12, 37	Loopback (not connected)
Not used	14-18, 20-24, 39-43, 45-49		14-18, 20-24, 39-43, 45-49	Not used

MIP Interface Cable Pinouts

The MIP T1 interface cables have two, male, 15-pin DB connectors (one at each end) to connect the MIP with the external CSU. Table A-16 lists the pinouts for the null-modem T1 cable, and Table A-17 lists the pinouts for the straight-through T1 cable. Table A-18 lists the pinouts for the E1 interface cables.

Table A-16: T1 Null-Modem Cable Signals

15-Pin DB Connector			15-Pin DB Connector
Signal	Pin	Pin	Signal
Tx tip¹	1	3	Rx tip
Rx tip²	3	1	Tx tip
Tx ring	9	11	Rx tip
Rx tip	11	9	Tx ring

¹ Tx = transmit.
² Rx = receive.

Table A-17: T1 Straight-Through Cable Signals

15-Pin DB Connector			15-Pin DB Connector
Signal	Pin	Pin	Signal
Tx tip¹	1	1	Tx tip
Tx ring²	9	9	Tx ring
Rx tip	3	3	Rx tip
Rx tip	11	11	Rx tip

¹ Tx = transmit.
² Rx = receive.

Table A-18: E1 Interface Cable Pinouts

MIP End		Network End
DB-15¹		BNC	DB-15		Twinax		RJ-45
Pin	Signal²	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

¹ Any pins not described in this table are not connected.
² Tx = transmit. Rx = receive.

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