H3C MSR Router Comware 5 Series Manual page 193

Figure 187 Sequence of RJ-45 pins
Table 231 Pinouts of E&M interface cable (Bell V 4-wire)
E&M interface
RJ-45 Pin
1
2
3
4
5
6
7
8
NOTE:
Because the 4E&M modules cannot determine the interface types (Bell I/II/III/V), cable types (2-wire
or 4-wire), and pinouts (E/M/Tx/Rx) of the peer switch, you must prepare the interface cables of the
4E&M modules according to the on-site conditions. To ensure the EMC of the router, install a ferrite
core near the connector of the E&M module interface cable at the router side.
The connection method
Connect one end of the magnetic-core telephone cable to the RJ-11 or RJ-45 interface of the
1.
interface module.
Connect the other end of the magnetic-core telephone cable to the remote device interface.
2.
Signal
—
E
RING0
RING1
TIP1
TIP0
M
SG
184
Signal direction
—
IN
IN
OUT
OUT
IN
OUT
Ground