Vertical Comdial DX-80, Technical Manual

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DX-80 Program-
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10.23 Configuring Single Line Telephones
(Analog Device Support)
Analog extension ports are provided for connection of standard, two-wire, analog telephone equipment to the
digital network of the DX-80. Common uses of the analog extension ports are facsimile machines, modems, and
wireless and wired single line analog telephones.
The DX-80 system basic configuration has four standard analog extension ports available. As the system expands,
you can install additional APM4’s (Analog Port Module-4 port) in place of Digital Port Module-8’s (DPM8).
Each APM4 provides four dedicated DTMF receivers for decoding the dialed digits from the connected device
(each analog port has a dedicated DTMF receiver). To place calls, the analog device must provide DTMF tone sig-
naling, which is decoded by the APM4 for call processing instructions. Each analog port provides 25 – cycle, (fre-
quency) ringing for the attached analog device.
Since each APM4 provides dedicated DTMF receivers and ringing generators, and because the system has a non-
blocking digital ICM bus, the Single Line Telephones/Analog Devices are not traffic sensitive and do not require
special traffic balancing.
The following conditions apply to setting up single line telephones.
• You can connect any single line (2500 type) telephone equipment to the system using one of the standard
analog ports available on the Analog Port Module (APM4).
• Analog ports are dedicated to the extension directory numbers system resource. You can assign these
directory numbers while programming the system.
• The allocation of DTMF Receivers (required resource to receive dialed digits from analog devices) is one to
one in the DX-80 system. That is, the system provides one DTMF receiver per analog port for decoding
DTMF signals dialed by analog devices/SLT users.
Whenever extension users want to invoke a system feature at a single line telephone, they must operate the hook-
switch in a fashion that is distinguishable from an on-hook (hang up) request. Considering this, the DX-80 system
allows you to customize the hook-switch command monitoring. For details on controlling the hookflash for SLTs,
see Section 6.14,
Establishing Start and End of SLT Hook Flash .