System Installation 2-9
System Installation Connector Pin-outs
2.4.3 T1 interface RJ45 connector

Table 2-6 lists the T1 RJ45 connector pinouts.

E&M
Port 2 T1-2 31 FXS
Port 2 T-2 43
E&M
Port 2 R1-2 6 FXS
Port 2 R-2 18
E&M
Port 2 E-2 32 FXS
Port 3 T-3 44
E&M
Port 2 M-2 7 FXS
Port 3 R-3 19
E&M
Port 2 SG-2 33 FXS
Port 4 T-4 45
E&M
Port 2 SB-2 8 FXS
Port 4 R-4 20
E&M
Port 3 T-3 34 A LM
1A Alarm
contact 46
E&M
Port 3 R-3 9 ATM
1B Alarm
contact 21
E&M
Port 3 T1-3 35 ALM
2A Alarm
contact 47
E&M
Port 3 R1-3 10 ALM
2B Alarm
contact 22
E&M
Port 3 E-3 36 ALM
3A Alarm
contact 48
E&M
Port 3 M-3 11 ALM
3B Alarm
contact 23
E&M
Port 3 SG-3 37 ALM
4A Alarm
contact 49
E&M
Port 3 SB-3 12 ALM
4B Alarm
contact 24
NC Not Used 50
NC Not Used 25

Table 2-5. 25-pair female amphenol connector

Port Designation Pin Port Designation Pin