System information

24 LINGO TECHNICIAN’S GUIDE
External modules
Some telephone systems use external
modules to provide single-line support.
The module is a small box or cabinet
that mounts on or near the telephone
system cabinet. The module connects
to and converts one or more electronic
key telephone connections to single-line
port service. The module’s single lines
terminate in standard modular jacks.
Lingo ports connect to the telephone
system through leads connected to
these single-line jacks.
External modules usually include AC
ringing and DTMF signaling support.
Built-in support
Some telephone systems are
preequipped with single-line ports.
Like an external module, the single lines
terminate in a standard modular jack.
Lingo ports connect to these jacks with
leads.
Built-in lines support AC ringing. In
most cases, they also support DTMF
signaling. On a few systems, you may
need to add a card or module for DTMF
support.
Special telephone system capabilities
Lingo offers several voice mail features that
take advantage of special capabilities found
on some telephone systems. Lingo’s feature
and the corresponding telephone system
capabilities are described as follows.
Message notification
Lingo can notify a subscriber of new
messages. It does this in one of the
following ways:
• Activating a message waiting lamp at
the extension telephone
• Activating a special dial tone at the
extension telephone
• Calling the extension telephone at
30-minute intervals to deliver
messages
• Announcing that messages are
waiting when the subscriber calls the
system
TELEPHONE SYSTEM REQUIREMENTS