Page346 of 544 M5317BRI Terminal
553-3011-100 Standard14.00 January 2002
Data and headset option
An optional feature card (factory or field installed) permits the use of circuit
and packet switched data by way of an RS-232C connector at the rear of the
telephone, which allows connection of a personal computer (PC) terminal;
the card also allows an appropriate headset to be used instead of the built-in
Handsfree/Mute speakerphone. Field installation requires opening the
telephone, which should only be done by an experienced installer. The data
option serves as a DCE (Data Communications Equipment), using either a
subset of the Hayes Smartmodem protocol or an X.25 PAD using X.3, X.28,
X.29 protocols. The RS-232C data port may also be configured to provide
control of the telephone for system test purposes.
Dial access
Any available dialed code acce ss features may be used. Specia l screens or
softkeys are not associat ed with them. The follo wing are examples of dialed
code access features:
•Directed Call Pickup
•Directed Call Park
•Authorization Code Entry
•Call Request
•Loudspeaker Paging
•Dictation Access and Control
Power
Power for the M5317T telephones is always supplied through the line cord.
The telephones can be configured for either designated (continued service
during local power failures) or non-designated (no service during local power
failures) operation.
Power may be provided from PS1 or PS2 source output of NT1 interface, or
can be provided locally from a sealed alternating current (AC) plug-in
transformer with direct current (DC) output.