Specifications

3-10 Cisco 2500 Series Hardware Installation
Cable Pinouts
Table 3-6 BRI Port Pinout (RJ-45)
Warning
Network hazardous voltages are accessible in the BRI cable. If you detach the
BRI cable, detach the end away from the router first to avoid possible electric shock.
Network hazardous voltages are also accessible on the system card in the area of the BRI
port (RJ-45 connector), even when power is turned OFF.
Note All serial cables have a DB-60 connector on the router end. The following pinouts
represent only the router ends of the cables. Because of the small pins on the DB-60
connector, manufacturing and soldering these cables yourself might be very difficult and is
not recommended. In the following tables, serial pinouts for DTE and DCE cables use
arrows to indicate signal direction: —> indicates DTE to DCE, and <— indicates DCE to
DTE.
1. Pins 1, 2, 7, and 8 are not used.
2. TE refers to terminal terminating layer 1
aspects of TE1, TA, and NT2 functional
groups.
3. NT refers to network terminating layer 1
aspects of NT1 and NT2 functional groups.
8
Pin
1
TE
2
NT
3
Polarity
3 Transmit Receive +
4 Receive Transmit +
5 Receive Transmit –
6 Transmit Receive –