4.1.2.6 Call Hold (HOLD)—by ISDN
Description
An ISDN call can be put on hold using the ISDN service of the telephone company, instead of the PBX feature.
This can be a part of a Call Transfer (CT)—by ISDN (® 4.1.2.7 Call Transfer (CT)—by ISDN) and Three-party
Conference (3PTY)—by ISDN (® 4.1.2.8 Three-party Conference (3PTY)—by ISDN). This feature allows an
ISDN call to be held, and a call to be made to another outside party using only one communication channel of
ISDN. A PT user can easily use this feature by pressing the ISDN Hold button.
Conditions
• This feature complies with the following European Telecommunication Standard (ETS) specification:
– ETS 300 141 Call Hold (HOLD) supplementary service.
• ISDN Hold Button
A flexible button can be customised as the ISDN Hold button.
• The availability of this feature is dependent on the contract with the telephone company.
• The TRS/Barring feature is applied when making a call after activating this feature. (® 2.7.1 Toll Restriction
(TRS)/Call Barring (Barring))
• ARS cannot be applied to the call dialled after activating this feature. (® 2.8.1 Automatic Route Selection
(ARS))
• It is impossible to seize any other trunk during this feature.
PC Programming Manual References
10.6.1 PBX Configuration—[2-6-1] System—Numbering Plan—Main—Features—
ISDN Hold
12.1.4 PBX Configuration—[4-1-4] Extension
—Wired Extension—Flexible Button—
Type
12.2.3 PBX Configuration—[4-2-3] Extension
—Portable Station—Flexible Button—
Type
Feature Guide References
2.21.2 Flexible Buttons
394 Feature Guide
4.1.2 Integrated Services Digital Network (ISDN) Service Features
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