Chapter 3 System Features
Voice 2-Wire Office Module
3-66
255-700-025
PacketStar
™
Access Concentrator 60 User Guide
, Issue 1
Release 6.3.0
•
Interfaces supported: EIA-232-D, EIA-530, EIA-449 v.11 (subset), and
V.35, with the Access Concentrator system configured as either a data
terminating equipment (DTE) or a data communications equipment
(DCE) device.
•
Data transmission rate:
~
Minimum: 75 Mbps per port
~
Maximum: 2.048 Mbps per port
~
Aggregate of all ports maximum: 4 Mbps
•
Protocols: frame relay, circuit emulation, terminal emulation, HDLC pass-
through, and ATM
Voice 2-Wire Office Module
The Voice 2-Wire Office module 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 an Access Concentrator
system and communicate over an ATM network to a distant telephone or
other analog device.
The Voice 2-Wire Office module has three types of LED indicators: ACTIVE,
FAIL, and LOS (loss of signal). There is a LOS LED for each port on the
faceplate. The LED turns on when the port goes off-hook. It also turns on
and off in synchonization with an incoming ringing signal to the port.
Software Features
A PVC connection can be set up between a Voice 2-Wire Office module and a
Voice 2-Wire Station module. This connection enables 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.
•
Number of ports: four
•
Connector type: RJ-11
•
Ringing frequency: 20 Hz
•
Termination impedance: 600 Ohms
•
Signaling: dual tone multi-frequency (DTMF)
•
Supervision: loop start
Voice 2-Wire Station Module
The 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