Service Description & Reference
Completion of Calls to Busy
Subscriber (CCBS)
If a call is made to an outside party and the party is busy, an
extension can receive callback ringing when the called party
becomes free.
® 4.1.2.10 Completion of Calls to Busy Subscriber (CCBS)
3. ISDN Centrex Service
An extension
user can have access to the features of the ISDN Centrex Service of the telephone company
(e.g., Call Transfer). This is used by putting the current ISDN call on hold by sending a flash/recall signal.
This feature is enabled or disabled for each ISDN port.
® 9.27 PBX Configuration—[1-1] Configuration—Slot—Port Property - BRI Port—ISDN CO—
ISDN
Centrex
® 9.28 PBX Configuration—[1-1] Configuration—Slot—Port Property - PRI Port—CO Setting— ISDN
Centrex
4. Private Networking Connection (QSIG)
Private networking with QSIG is possible using an ISDN line. The QSIG mode, Master or Slave, can be
enabled on an ISDN port basis.
5. ISDN Extension (® 5.2.5.1 ISDN Extension)
An
ISDN (BRI/PRI) port can be used for extension connection. While the extension connection is enabled,
ISDN terminal devices (e.g., ISDN telephone, G4 fax machine, PC) or a behind PBX can be connected to
the port.
When the ISDN port is in P-P configuration, one ISDN terminal device can be connected to the port.
When the ISDN port is in P-MP configuration, a maximum of eight ISDN terminal devices can be connected
to the port. However, only a maximum of two devices can be used simultaneously.
Conditions
• Overlap/En bloc
For each ISDN port, either Overlap or En bloc can be selected as the dialling method for which the PBX
sends telephone numbers to the telephone company. The selected dialling method must be offered by the
telephone company. When "Overlap" is selected, the PBX sends each dialled digit individually.
When "En bloc" is selected, the PBX sends all of the dialled digits at once.
® 9.27 PBX Configuration—[1-1] Configuration—Slot—Port Property - BRI Port—ISDN CO— ISDN
Outgoing Call Type
® 9.28 PBX Configuration—[1-1] Configuration—Slot—Port Property - PRI Port—CO Setting—
ISDN
Outgoing Call Type
In En bloc mode, the PBX recognises that the user is finished dialling when:
– the # key is pressed (programmable).
® 10.9
PBX Configuration—[2-9] System—System Options—Option 2—
ISDN en Bloc Dial—[#] as
End of Dial for en Bloc mode
– the dialled number is a preprogrammed telephone number.
®
11.1.4 PBX Configuration—[3-1-4] Group—Trunk Group—Dialling Plan
– the inter-digit timer expires.
® 10.3 PBX Configuration—[2-3] System—Timers & Counters—Dial / IRNA / Recall / Tone—
Dial—Extension Inter-digit
• Some supplementary services are provided by the key protocol (® 4.1.2.11 ISDN Service Access by
Keypad Protocol).
• Extension Number
An extension number can be assigned to each ISDN port.
340 Feature Guide
4.1.2 Integrated Services Digital Network (ISDN) Service Features
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