1.20 Integrated Services Digital Network (ISDN) Service Features
1.20.1.11 ISDN Extension
Description
An ISDN (BRI/PRI) port can be used for either trunk or extension connection. When extension connection is enabled, ISDN terminal devices (e.g., ISDN telephone, G4 fax machine, personal computer) or a behind PBX can be connected to the port.
If the ISDN port is in
Individual terminal devices on a behind PBX can be addressed with Multiple Subscriber Number (MSN). The MSN consists of the ISDN extension number and an additional digit, 0 through 9 or 00 through 99.
[Example]
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| Extn. No.: 1234 |
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| ISDN Port for |
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| EXTN. |
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| 1234: |
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| Up to eight terminals |
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| ... |
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| the port and receive |
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PBX | (1234) | (1234) | ... | (1234) | a call simultaneously. | |||||||||||
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| Extn. No.: 13X (MSN) |
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| ISDN Port for |
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| Up to eight terminals | ||
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| EXTN. |
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| ... |
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| the port. |
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| 130: | |
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| (131) | (132) |
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| All terminals receive | ||||||||
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| a call simultaneously. |
ISDN Port for | Extn. No.: 14XX (MSN) |
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EXTN. |
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ISDN Port for |
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EXTN. |
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| Behind |
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Extn. No.: 15XX | ... |
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(MSN) |
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| (1400) | (1401) ... | (1499) | (Use the DDI/MSN |
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| Idle Extension |
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| Hunting is available. |
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Conditions
•Subaddressing
Subaddressing is possible between ISDN terminal devices. The subaddress goes through the PBX to the ISDN terminal devices directly.
•Call Transfer (PBX feature) is available only for ISDN extensions in