Single Line Telephones; Message Waiting - NEC DSX-40 Feature Handbook

Single Line Telephones

Description
Connect analog devices such as single line telephones and fax machines to the system.
The system is compatible with 500 type (dial pulse) and 2500 type (DTMF) analog telephone devices. This
includes on-premises single line telephones (SLTs), fax machines, and modems.
In DSX-40, SLTs connect to analog ports in the main equipment cabinet. In DSX-80/160, SLTs connect to
ASTU PCBs. Each analog port provides power and ring voltage for the connected SLT. The analog ports use
DTMF receivers. Each system provides 10 DTMF receivers that are shared by all connected analog ports.

Message Waiting

Both DSX-40 and DSX-80/160 support FSK Message Waiting lamps. DSX-80/160 also provides support for
high voltage Message Waiting lamps – while DSX-40 does not.
DSX Feature Handbook
Single Line Telephones
Features ◆ 141