Lucent Technologies PacketStar PSAX 2300, Руководство пользователя

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255-700-447 D-49
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1 Release 9.0.0
Appendix D PSAX Module Features
Voice 2-Wire Interface Modules
The module has three types of light emitting diode (LED) indicators: ACTIVE,
FAIL, and LOS (loss of signal). On the faceplate, each port has a LOS LED
that illuminates when the port goes off-hook. It also flashes in synchroniza-
tion with an incoming ringing signal to the port.
Software Features The 8-Port Voice 2-Wire Station module can be used to establish a permanent
virtual circuit (PVC) on a voice circuit that originates on the same module.
This module also provides private-line automatic ring-down (PLAR) service
for the PVC. PLAR provides a point-to-point private line between two tele-
phone sets. If either station goes off-hook, the other one automatically rings.
The ringing will stop when the called station goes off-hook or the calling sta-
tion goes back on-hook. The PLAR service provides 20-Hz ring-down, loop-
start supervision, and no signalling. The module also supports FXS service via
a PVC connection with a 4-Port Voice 2-Wire Office module. This connection
enables a foreign exchange (FXO) voice service to be transmitted across an
ATM network. With FXO service, the voice switch provides dial tone, ringing,
and digit translation, which are not provided by the ATM network.
Hardware Features The 8-Port Voice 2-Wire Station module supports these hardware features:
• Number of ports: 8
•
Connector type: RJ-12
• Ringing frequency: 20 Hz
•
Termination impedance: 600 Ohms
• Signaling: none
•
Supervision: loop start