Vodavi Starplus DHS, Technical Manual

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DHS General Description 2-11
2-Port Analog Adapter
A 2-Port Analog Adapter is optionally available which will support most auxiliary
equipment within a business environment such as fax machines, answering devices and
Single Line Telephones (SLT). Each adapter requires an unused digital station port and
will yield two analog device interfaces.
The 2-Port Analog Adapter is a wall mount apparatus that is powered from the KSU. The
adapter receives both voice channels and data control from the KSU, over one pair of
wires. The 2-Port Analog Adapter generates -30V DC and 20-25Hz, 50V square wave
ringing for operation of SLTs, fax machines, answering devices, and most modems. All
terminations are by RJ-11 connection.
The analog Adapter utilizes the B1 channel for voice tip/ring connection to one analog
station, and the B2 channel for the other. D channel provides port control to and from the
KSU. The adapter provides two DTMF receivers (one for each analog port). Third party
analog devices connected to the 2-Port Analog Adapter must generate DTMF signaling
(Pulse/rotary dial telephones/equipment are not supported). The 2-Port Analog Adapter
provides adequate housing space for one 2-Port Analog Expansion.
Figure 2-10: 2-Port Analog Adapter
Loop disconnect and message waiting lamps are not supported by the analog adapter.