IP LDK-20 Programming Manual System Feature
171
2.14.9 ISDN - CALL HOLD/RETRIEVE
Description
This feature allows the user to make another call without using other channel. When the HOLD
supplementary service is invoked, communication on a B-channel is interrupted and the B-channel is
released. The network reserves the B-channel used by the user for subsequent reuse. With this
feature, ISDN-Broker Call and Call Waiting are available.
Operation
To hold the current call:
1. Press the
[FLASH]
key during conversation
2. Press the
[HOLD]
key. Or
Press programmed {SUPP HOLD} button.
To make a new call by using the same channel
1. Press the
[FLASH]
key.
2. Press the
{CO}
key. Or
Dial CO Access Code 9.
To retrieve the held call during conversation;
1. Press the
[HOLD]
key. Then current call goes on hold and the held call is retrieved.
To retrieve the held call after hanging up the current conversation;
1. Press the {CO} key that is flashing with 480 IPM.
Condition
1. Both keypad protocol and functional protocol are implemented.
2. [FLASH] and [HOLD] keys or pre-programmed {SUPP HOLD} are needed for this feature.
{SUPP HOLD} key can be made by Code [TRANS/PGM] + * + 5 + [HOLD]
3. ISDN Call Hold feature is available during conversation.
4. The line, which is associated with this ISDN supplementary service, can not be transferred to
other stations or can not be retrieved from other stations. And the held channel can be retrieved
only by the station which held the channel before.
5. When a call is on hold, the associated LED for the line will flash at 480 IPM in the station that uses
the line. And all the LED’s will be ON (busy) in the other stations.
6. When a call is on hold and the user make a new call, the associated LED for the line at the station
will be ON.
Admin Programming
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■
ISDN Attributes II
4.7.4 (PGM 203)
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