62
B.3 E1 INTERFACE
RJ-48C female connector
B.4 X.21 INTERFACE
D-sub-15 female connector (DTE/DCE orientation)
Pin #
Signal
1
Receive (Ring)
2
Receive (Tip)
3
Shield
4
Transmit (Ring)
5
Transmit (Tip)
6
Shield
7
No connection
8
No connection
Pin #
Signal
1
Frame Ground
2
T - Transmit Data-A (DTE Source)
3
C - Control-A (DTE Source)
4
R - Receive Data-A (DCE Source)
5
I - Indication-A (DCE Source)
6
S - Signal Element Timing-A (DCE Source)
7
BT - Byte Timing-A (DCE Source)
8
SGND - Signal Ground
9
T/ - Transmit Data-B (DTE Source)
10
C/ - Control-B (DTE Source)
11
R/ - Receive Data-B (DCE Source)
12
I/ Indication-B (DCE Source)
13
S/ Signal Element Timing-B (DCE Source)
14
BT/ - Byte Timing-B (DCE Source)
