Huawei Quidway R2600 Series Installation Manual page 116

Installation Manual
Quidway R2600/3600 Series Modular Routers
Figure 8-52 Sequence of RJ-45 pinouts
When using Bell V 4-wire mode of connection, the corresponding relationship of RJ-45
pinouts at router side and at the switch side is shown as the following figure.
-48 V
4- wire
audio
frequency
Figure 8-53 E&M interface cable assembly (Bell V 4-wire)
Table 8-38 E&M interface cable assembly (Bell V 4-wire)
RJ-45 Pin
1
2
3
4
5
6
7
8
PBX
E
detect
M
off-hook
on-hook
T0
R0
T1
R1
Router side
RJ-45 interface signal
SB (negative power supply)
E
RING0
RING1
TIP1
TIP0
M
SG (negative power supply ground)
8-54
Router
on-hook
7
M
on-hook
2
E
detect
6
T0
3
R0
5
T1
4
R1
Switch signal corresponding to Bell V 4-wire
---
M
RING0
RING1
TIP1
TIP0
E
---
Chapter 8
Function Modules
off-hook
-48 V
-48 V
4- wire
audio
frequency