Black Box COMPACT T1 MT850A - Manual (Page 391)

Compact T1 - Release 6.1 7-7
FXO Voice Card
Card Configuration
DIP Switch Settings
Each FXO card contains ten DIP switches that can be used to select signaling options
for all eight channels.
Switch Function Description Note
1-2 Signal
Type 1 2
0 0 = FXO Loop Start
1 0 = FXO Ground Start
0 1 = DPT (use with
E&M setting on T1)
1 1 = FXO Loop Start
with Calling Party
Disconnect
3-6 Receive
Gain/Loss 3 4 5 6 These settings allow for
receive gain and losses of -9,
-7, -6, -5, -4, -3, -2, 0, 2, 3, 4,
5, 6, and 7.
+9 (1110) is not available.
0 0 0 0 = 0 dB
0 0 0 1 = -9 dB
0 0 1 0 = +2 dB
0 1 0 0 = +3 dB
1 0 0 0 = +4 dB
7-10 Transmit
Gain/Loss 7 8 9 10 These settings allow for
transmit gain and losses of -
9, -7, -6, -5, -4, -3, -2, 0, 2, 3,
4, 5, 6, and 7.
+9 (1110) is not available.
0 0 0 0 = 0 dB
0 0 0 1 = -9 dB
0 0 1 0 = +2 dB
0 1 0 0 = +3 dB
1 0 0 0 = +4 dB