Raisecom
RC3000-15 (P100R001) Hardware Description
8 Voice cards
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91
Table 8-27
PIN definitions of the interface on the E&M
PIN
Cable
Definition
1
SB
Signal battery, used for II, III, and IV signaling
2
E
E signaling cable
3
R1
Idle in 2-wire mode
Rx R1 in 4-wire mode
4
R
Rx R in 2-wire mode
Tx T1 in 4-wire mode
5
T
Tx T in 2-wire mode
Tx T in 4-wire mode
6
T1
Idle in 2-wire mode
Rx R in 4-wire mode
7
M
M signaling cable
8
SG
Signal ground, used for II, III, and IV signaling
The E&M signaling is used to indicate the on-hook or off-hook status of the telephone. It
transmits the corresponding status through the wiring mode of the E wire and M wire. Table
8-28 lists types of E&M signaling
The 10E&M supports configuring the type of E&M signaling of the voice interface
through the jumper on the card.
Each voice interface can be configured to support one of the I, II, III, IV, or V signaling.
By default, the signaling type of the voice interface is V.
The signaling types of the PBX and E&M must be the same.
Table 8-28
Types of E&M signaling
Signaling type
Description
I
Usually used in North American areas
II
Seldom used
III
Usually used in the traditional telephone center
IV
Seldom used
V
Usually used in areas except North American
The RC3000-15, as a Tie line device, uses the following E&M signalling type shown in
Figure 8-4.