Appendix D PSAX Module Features
Voice 2-Wire Interface Modules
D-48
255-700-447
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
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Line encoding mode: N/A
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Loopback capabilities: line loopback and local loopback from console, Tel-
net, or EMS interfaces
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Line buildout: N/A
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Framing modes: HDLC checksum, LANET
Voice 2-Wire Interface Modules
4-Port Voice 2-Wire Office Module (20N32)
The 4-Port Voice 2-Wire Office module (20N32) provides support for the
office (central office or PABX switch) end of a two-wire analog telephone
line. This allows a voice loop from a voice switch to be connected directly to a
Multiservice Media Gateway system over an ATM network to a distant tele-
phone or other analog device. The coding translation supported by this mod-
ule is µ-law to µ-law only.
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 which turns on when the port goes off-hook. It also flashes in synchro-
nization with an incoming ringing signal to the port.
Software Features
This module is typically configured with an 8-Port Voice 2-Wire Station mod-
ule via a PVC connection to enable 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 4-Port Voice 2-Wire Office module supports these hardware features:
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Number of ports: 4
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Connector type: RJ-11
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Ringing frequency: 20 Hz
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Termination impedance: 600 Ohms
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Signaling: dual tone multi-frequency (DTMF)
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Supervision: loop start
8-Port Voice 2-Wire Station Module (20N30)
The 8-Port Voice 2-Wire Station module provides support for the station
(telephone set) end of a two-wire analog telephone line. A telephone or
other analog voice device can be connected directly to this module in the
multiservice media gateway system over an ATM network. The coding trans-
lation supported by this module is µ-law to µ-law only.