1.21.1.6 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 (® 1.21.1.7 Call Transfer (CT)—by ISDN) and Three-party
Conference (3PTY)—by ISDN (® 1.21.1.8 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. (® 1.9.1 Toll Restriction
(TRS)/Call Barring (Barring))
• ARS cannot be applied to the call dialled after activating this feature. (® 1.10.1 Automatic Route Selection
(ARS))
• It is impossible to seize any other trunk during this feature.
PC Programming Manual References
4.9 [2-6-1] Numbering Plan—Main—Features—
ISDN Hold
6.5 [4-1-4] Wired Extension—Flexible Button— Type
6.13 [4-2-3] Portable Station—Flexible Button— Type
6.17 [4-3] DSS Console— Type
Feature Guide References
1.20.2 Flexible Buttons
Feature Guide 251
1.21.1 Integrated Services Digital Network (ISDN)
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