ADTRAN 1248 - Manual (Page 37)

Installation Steps
61179641AL4-5B 3-13
Network Connections
Network connections are accomplished via the 50-pin amphenol connector labeled T1/E1 1-8
(see Figure 3-9 ) . See Table 3-4 for the pinout of the T1/E1 interface and the analog modem.
Figure 3-9. Total Access 1248 Network Connection
Table 3-4. T1/E1/Modem Interface Pinout
Pin Numbers Description
1, 26 RX Tip/Ring 1
2, 27 TX Tip/Ring 1
3, 28 RX Tip/Ring 2
4, 29 TX Tip/Ring 2
5, 30 RX Tip/Ring 3
6, 31 TX Tip/Ring 3
7, 32 RX Tip/Ring 4
8, 33 TX Tip/Ring 4
9, 34 RX Tip/Ring 5
10, 35 TX Tip/Ring 5
11, 36 RX Tip/Ring 6
12, 37 TX Tip/Ring 6
13, 38 RX Tip/Ring 7
14, 39 TX Tip/Ring 7
15, 40 RX Tip/Ring 8
16, 41 TX Tip/Ring 8
17–24 Unused
42–49 Unused
25, 50 Modem Tip/Ring
FAN MODULE
1179675L1 117964
PORTS 1-24 EXPANSION
-48V .....,5.0A . USE COPPER CONDUCTORS ONLY!
A B
-48V RET -48V RET
A