Installation manual

COMSPHERE 3000 Series Carrier
A-2 March 2001 3000-A2-GA31-F0
NIM Interface Connections
One or two optional 50-pin NIMs provide the interface
to the dial network or the 2-wire switched 56 kbps digital
network.
• Table A-2 provides the permissive dial NIM pin
assignments for dial, ISDN, and 2-wire switched
56 kbps applications.
• Table A-3 supplies the programmable dial NIM pin
assignments.
• Table A-4 provides the 4-wire switched 56 kbps
NIM pin assignments.
• Table A-5 includes the 24-port modem pin
assignments.
Table A-2
RJ21X Permissive Dial NIM Used for
Dial, ISDN, and 2-Wire Switched 56 kbps NIM
Slot
Pin Assignments
Sl
ot
T R
1 or 9 26 1
2 or 10 27 2
3 or 11 28 3
4 or 12 29 4
5 or 13 30 5
6 or 14 31 6
7 or 15 32 7
8 or 16 33 8
Table A-3
RJ27X Programmable Dial NIM
Slot
Pin Assignments
Slot
T R PR PC
1 or 9 27 2 28 3
2 or 10 30 5 31 6
3 or 11 33 8 34 9
4 or 12 36 11 37 12
5 or 13 39 14 40 15
6 or 14 42 17 43 18
7 or 15 45 20 46 21
8 or 16 48 23 49 24
Table A-4
SJA57 4-Wire Switched 56 kbps NIM
Slot
Receive Transmit
Sl
ot
T R T1 R1
1 or 9 26 1 27 2
2 or 10 28 3 29 4
3 or 11 30 5 31 6
4 or 12 32 7 33 8
5 or 13 34 9 35 10
6 or 14 36 11 37 12
7 or 15 38 13 39 14
8 or 16 40 15 41 16