NEC Univerge SV8100 Features And Specifications Manual page 419

UNIVERGE SV8100
Warning Tone for Long DISA Calls
You can set up the system to provide a warning tone to DISA callers that have been on a call too long.
The warning tone can be just a reminder (which the caller can ignore) or can be followed by a forced
disconnect of the call. When the DISA caller hears the warning tone, they have the option of dialing a
code to continue the conversation or disconnect.
Trunk Continue/Disconnect Codes
Users can use the option to use a Continue or Disconnect service code. The Continue service code
extends the conversation for a programmed time. If the user enters the Disconnect service code, the call
is immediately disconnected.
Example:
The following example indicates how a call will be handled with the system programmed as follows:
Program 14-01-25: 1
Program 20-28-01:
Program 20-28-02: No Setting
Program 20-28-03: 180
Program 24-02-07: 600 (Used only with manually transferred Tandem Trunk calls)
Program 24-02-10: 30 (Used only with manually transferred Tandem Trunk calls)
Program 25-07-07: 600 (Used only with automatically transferred Tandem Trunk calls or DISA calls)
Program 25-07-08: 30 (Used only with automatically transferred Tandem Trunk calls or DISA calls)
1. An external call connects to an external number (either by transferring with Tandem Trunking or by DISA
caller).
2. After 10 minutes (Tandem Trunking = Program 24-02-07 or DISA = Program 25-07-07), a warning tone is
heard and the user dials
3. After three minutes (Program 20-28-03), the warning tone is heard again. After 30 seconds (Tandem
Trunking = Program 24-02-10 or DISA = Program 25-07-08), the call is disconnected.
Conditions
The DISA caller must use an analog (DTMF) telephone. DISA is compatible with calling
devices that meet the DTMF signaling requirements of EIA Specification RS-464. DISA
trunks must be ground start or supervised loop start.
The Continue/Disconnect code must be DTMF.
With an analog trunk, the Continue/Disconnect code may work using DTMF sounds from the
opposite side trunk. With an ISDN trunk, Program 14-01-25 must be enabled to detect the
Continue/Disconnect code.
The Continue/Disconnect code is not accepted while dialing a trunk.
Continue/Disconnect codes do not work if all DTMF receivers are busy.
When used with the Networking feature, both systems must be programmed the same.
SV8100 Features and Specifications Manual
#
# (Program 20-28-01) to extend the conversation.
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