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1.20 Integrated Services Digital Network (ISDN) Service Features
Feature Guide 185
• Some supplementary services are provided by the key protocol ( 1.20.1.12 ISDN
Service Access by Keypad Protocol).
• Extension Number
An extension number can be assigned to each ISDN port.
• Network Type
Each ISDN port can be set to the requirements of each country/area ( BRI Network
Type [420] *For BRI only).
• L1 Active Mode and L2 Data Link Mode
The active mode of Layer 1 (L1) ( BRI Layer 1 Active Mode [424] *For BRI only) and the
data link mode of Layer 2 (L2) ( BRI Layer 2 Active Mode [425] *For BRI only) can be
selected individually, Permanent or Call by Call, on an ISDN port basis.
• TEI Assignment Mode
The Terminal Endpoint Identifier (TEI) assignment mode can be selected on an ISDN port
basis ( BRI TEI Mode [427] *For BRI only).
• Bearer Mode
The bearer mode can be assigned on an extension basis.
• Automatic ISDN Configuration
ISDN (BRI) port configuration can be set automatically through system programming.
The following items will be set by making and receiving a call using the subscriber number
assigned for each ISDN (BRI) port:
Feature Guide References
1.28.3 QSIG Network
– Dialling #, if programmed
– Dialling a preprogrammed telephone number
– Inter-digit timer expires.
– L1 Active Mode
– L2 Data Link Mode
– Access Mode (Point-to-Point/Point-to-Multipoint)
– TEI Assignment Mode (Fix 00–63/Automatic)