Cisco ASR 903 Troubleshooting Manual page 13

Troubleshooting
Pin
4
5
6
7
8
Twisted Pairs are: 1-2, 3-6, 4-5, 7-8.
Note
The X.21, V.35, RS-485, EIA-449, EIA-530, and IRIG-B standards are not currently supported by software.
Note
E and M Interface Module Pinouts
Table 13: RJ45 Front End Pinout
Pin
1
2
3
4
5
6
7
Standard DB-9 Direction
GND
GND
RxD Output
DST Output
CTS Output
Signal Description
SIG_BA T_N48V 48V signaling
battery
M_SIG_IN Signaling input
RING_AUDIO_IN Ring, audio input
R I N G _ A U D I O _ I N _ O U T Ring, audio
input/ouput or
output
T I P _ A U D I O _ I N _ O U T Tip, audio
input/output or
output
TIP_AUDIO_IN Tip, audio input
E_SIG_OUT Signaling output
Cisco ASR 903 Aggregation Services Router Hardware Installation Guide
E and M Interface Module Pinouts
Description RS-485
Signal ground Gnd
Signal ground Gnd
Receive data IRIG-B (RS232)
DSR TxD-
CTS TxD+
Type 1 2 3
— SB SB
M
R
R1
T1
T
E
IRIG-B
Gnd
Gnd
IRIG-B (RS232)
IRIG-B-
(RS485)
IRIG-B+
(RS485)
5 Usage
—
Not used in 2-wire
mode
4-wire mode: Output
2-wire mode: InOut
Not used in 2-wire
mode
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