7-90 SLT and ISDN Telephone Features
7.3 ISDN Telephone Features
The system supports ISDN telephones in addition to proprietary telephones and single
line telephones. The features are almost the same as ones of the single line telephone.
There are, however, some features that are unavailable for ISDN telephones as shown
below. As for available features, see Section 7.2, “SLT and ISDN telephone Features.”
Features unavailable for ISDN telephones
• Account Code Entry
Dialling “99” instead of “#” as the delimiter makes this feature available.
• Alternate Calling — Ring/Voice
• Automatic Callback Busy (Camp-On)
• Call Forwarding
• Call Hold
• Call Pickup, Group
• Call Waiting
• Conference
• Do Not Disturb (DND)
• Do Not Disturb (DND) Override
• Doorphone Call
- To unlock the door while talking to the doorphone
• Log-In / Log-Out
• Message Waiting
• Paging — ANSWER
- Answering a page sent to the built-in speaker
• Parallelled Telephone Connection
• Pickup Dialling (Hot Line)
• Station Speed Dialling
• Timed Reminder
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