Motorola POWERBROADBAND T2-2500 - Manual (Page 47)

Appendix A
Motorola, Inc. 549453-001-00-a Page 47 of 51
A A p p p p e e n n d d i i x x A A : : P P i i n n - - o o u u t t A A s s s s i i g g n n m m e e n n t t s s
The rear of the switch has two RJ21 connectors; one for the LINE (also called PBX, PSTN, or System) connections
and one for PHONE (also called House or Station) connections. The connector is wired as a 50 pin telco connector,
as follows:
RJ21 Line Connectors
Pin 26 = line 1 Tip
Pin 1 = line 1 Ring
Pin 27 = line 2 Tip
Pin 2 = line 2 Ring
Pin 50 =
line 25 Tip
Pin 25 = line 25 Ring
RS-232 console port
Pin 1
Unused Pin 6 Unused
Pin 2 TXD – transmit data Pin 7 Unused
Pin 3 RXD – receive data Pin 8 Unused
Pin 4 Unused Pin 9 Unused
Pin 5 GND – signal ground