Page352 of 544 M5317BRI Terminal
553-3011-100 Standard14.00 January 2002

Call timers

NI-1 and Meridian 1 modes only. Call timers are provided as follows:
•There is one timer for each call appearance, including non-directory
number (DN) call appe arances.
•Timers run when associated call appearances are connected or held.
•Timers may be manually reset by the user.
•Timers start automatically after 10 seconds if a call-connect message is
not received (non-ISDN or off-net calls).
•Timers start (or reset) when the called number answers.

Date and time-of-day clock

NI-1 and Meridian 1 modes only. This feature displays the time in 12-hour
format. If power fails, the date and time must be reset.
Data transmission
The M5317T telephones support PCM voice on either B-channel. Circuit-
switched data calls on the M5317TDX may be made using the other B-
channel. The NT T-link or standard V.120 protocols are used to convert the
serial data from the RS-232C port to the 64 Kbit/sec stream (rate adaption)
for transmission on the B-channel.
The M5317TDX Data Option is logically separate from voice calls. The
Hayes protocol is used to control circuit-switched data calls, and X.25 packet-
switched calls on D-channel are supported with X.3, X.28, X.29 control
protocol.