Isdn Bri Pinouts - Cisco VG310 Hardware Installation Manual

Cable Specifications and Information
Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF or
Warning
ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables, detach
the end away from the unit first. Statement 1026
Use a BRI cable (not included) to connect the BRI WAN interface card directly to an ISDN. The following
table lists the specifications for ISDN BRI cables.
Table 21: ISDN BRI Cable Specifications
Specification
Resistance (at 96 kHz)
Capacitance (at 1 kHz)
Impedance (at 96 kHz)
Wire diameter
Distance limitation

ISDN BRI Pinouts

To prevent damage to the system, ensure that you connect the BRI cable only to the BRI connector and
Caution
not any other RJ-45 connector. Also, make certain that you connect the E&M cable to an E&M connector
only.
The following table lists the connector signals and pinouts for an ISDN BRI S/T port.
Table 22: ISDN BRI S/T Port Signals and Pinouts (RJ-45)
8-Pin
3
4
5
6
OL-31292-01
1 2
TE
TX
RX
RX
TX
Cisco VG310 and Cisco VG320 Voice Gateways Hardware Installation Guide
High-Capacitance Cable
160 ohm/km
120 nF/km
nF= nano
Note
Farad
75 ohm
0.024 in. (0.6 mm)
32.8 ft (10 m)
3
NT
RX
TX
TX
RX
ISDN BRI Pinouts
Low-Capacitance Cable
160 ohm/km
30 nF/km
150 ohm
0.024 in. (0.6 mm)
32.8 ft (10 m)
Polarity
+
+
–
–
75