Chapter 3. Operation
3-6
Octal and Quad FXO Modules User Manual
61200310L1-1
T
IP
O
PEN
LS
No Tip Ground detected.
GS
Normal idle condition.
O
FF
H
OOK
FXO port has closed the hook switch (loop current flowing).
R
EVERSE
B
ATTERY
FXO port has detected reverse T/R polarity.
T
EST
FXO port generic test indicator used when multiple tests are being run or if
the test is not a 2W test.
T
EST
– LO
FXO port in test. Loop Open test selected.
T
EST
– LC T/R
OK
FXO port in test. Loop Closed test selected. Normal T/R polarity detected.
T
EST
– LC – N
O
B
ATTERY
FXO port in test. Loop Closed test selected. No Loop Battery detected.
T
EST
– LC – T/R
R
OLLED
FXO port in test. Loop Closed test selected. Reverse T/R polarity detected.
T
EST
– R
ING
GND
FXO port in test. Ring Ground test selected.
R
X
ABCD
Displays the receive signaling bits for FXO operation.
T
X
ABCD
Displays the transmit signaling bits for FXO operation.
Receive and transmit signaling bits represent an LS/GS interface between
the ATLAS 550 controller and the voice port. The bit pattern is formatted
ESF RBS. Signaling bits have local significance only. For example, if the voice
port is mapped to a DS0 that has been set up for E&M signaling, the voice
port will still show LS/GS signaling.
