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Interface Card and Interface Module Manual
H3C MSR 20/30/50 Series Routers
Chapter 3 Multifunctional Interface Modules
3-60
I. Interface cable of FXS/FXO modules
Connection cables for MIM-2FXS/MIM-2FXO and MIM-4FXS/MIM-4FXO are
telephone cables with ferrite core. For cable pinouts, see
Low-End and Mid-Range
Series Routers Cable Manual
.
II. Interface cable of E&M modules
E&M modules of H3C Series Routers support Bell I, II, III, V switches, and 2-wire &
4-wire voice signals.
It is recommended to use Bell V 4-wire voice signal to communicate with the Router in
practice.
The sequence of E&M RJ-45 pins is shown in the following figure, numbered 1 to 8
from left to right:
Figure 3-68
Sequence of RJ-45 pins
When connection is made in Bell V 4-wire mode, the pinouts of RJ-45 receptacles at
router side and at the switch side are shown in the following figure:
-48 V
PBX
Router
detect
M
E
7
on-hook
off-hook
on-hook
-48 V
on-hook
detect
M
E
2
off-hook
4- wire
6
T0
R0
T1
T1
R1
R1
R0
T0
4
5
3
4- wire
voice signal
-48 V
voice signal
Figure 3-69
E&M interface cable (Bell V 4-wire)