E&M Cable Pinouts to Connect Cisco 1750/2600/3600 E&M VIC to Nortel PBX Option 11 E&M Trunk

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Updated:February 2, 2006
Document ID:8632

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Introduction

These are the E&M Cable Pinouts used to connect a Cisco 1700/2600/3600/3700 E&M Voice Interface Card (VIC) to a Nortel PBX Option 11 E&M Trunk.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

Conventions

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

Pinout Configuration

The Nortel PBX 25 pair wire Amphenol Cable must be punched down with the standard Nortel PBX E&M punch down scheme as seen in this list in order for the E&M Cable Pinouts to work.

Wires: 5 pairs to a group:

  • White-blue, white-orange, white-green, white-brown, white-slate(grey)

  • Red-b, R-O, R-G, R-B, R-S

  • Black-b, B-O, B-G, B-B, B-S

  • Yellow-b, Y-O, Y-G, Y-B, Y-S

  • Violet-b, V-O, V-G, V-B, V-S

Nortel Option 11 PBX 

Type 1; 2-wires; router to PBX -----NorTel-----
Router  Pins	 			PBX       
							1 -- 7   						
M   			2 -- 6   		M
       3 --  
R1   		4 -- 4   		TA  
T1   		5 -- 5   		TB       
							6 --   					
E   			7 -- 3   	 E       
							8 --
Type 1; 4-wires; router to PBX -----NorTel-----
Router  Pins					PBX       
							1 --   
M   			2 -- 6   		M   
R   			3 -- 4   		TA
R1   		4 -- 1   		RA  
T1   		5 -- 2   		RB   
T   			6 -- 5   		TB   
E   			7 -- 3   		E       
							8 --
Type 2; 4-wires; router to PBX -----NorTel-----
Router  Pins					PBX
SB   		1 -- 7   		SB   
M   			2 -- 8   		M   
R   			3 -- 4   		TA  
R1   		4 -- 1   		RA  
T1   		5 -- 2   		RB   
T   			6 -- 5   		TB   
E   			7 -- 3   		E  
SG   		8 -- 6   		SG

VIC-2E&M Pinout

The E&M voice interface card uses an RJ48S connector. The pinout depends on the PBX type and connection. This figure shows the wiring pattern for this connector, and the lists typical configurations.

RJ48S Wiring

h11421.gif

Note: Pins that are not used should not be connected.

E&M Pinouts

      Two-Wire Operation, Type Four-Wire Operation, Type
Pin Signal Description 1 2 3 5 1 2 3 5
1 SB -48V signaling battery – SB SB – – SB SB –
2 M-lead Signaling input M M M M M M M M
3 R Ring, audio input – – – – R R R R
4 R or R1 Ring, audio input/output or output R R R R R1 R1 R1 R1
5 T or T1 Tip, audio input/output or output T T T T T1 T1 T1 T1
6 T Tip, audio input – – – – T T T T
7 E-lead Signaling output E E E E E E E E
8 SG Signaling ground return – SG SG – – SG SG –

Note: The Nortel Option11C PBX E&M Type I signaling matches the Cisco 3640 (or any other Cisco IOS gateway) Type V signaling. For more information about the Nortel PBX and Cisco Gateway Configuration, refer to Cisco 3640 Series Gateway-PBX Interoperability: Nortel Meridian 1 Option 11C PBX with Analog E&M Signaling.

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