4.1.2.6 Call Hold (HOLD)—by ISDNDescriptionAn 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-partyConference (3PTY)—by ISDN (® 4.1.2.8 Three-party Conference (3PTY)—by ISDN). This feature allows anISDN call to be held, and a call to be made to another outside party using only one communication channel ofISDN. 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 ButtonA 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 References10.6.1 PBX Configuration—[2-6-1] System—Numbering Plan—Main—Features— ISDN Hold12.1.4 PBX Configuration—[4-1-4] Extension—Wired Extension—Flexible Button— Type12.2.3 PBX Configuration—[4-2-3] Extension—Portable Station—Flexible Button— TypeFeature Guide References2.21.2 Flexible Buttons350 Feature Guide4.1.2 Integrated Services Digital Network (ISDN) Service Features
