1.20Integrated Services Digital Network (ISDN) Service Features
2.ISDN Supplementary Service Table for Public Network
Service | Description | Details in | |
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Direct Dialling In | Directs a call with a DDI number to a | • 1.1.1.3 Direct | |
(DDI) | preprogrammed destination. | Inward Dialling | |
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| (DID)/Direct | |
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| Dialling In | |
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| (DDI) | |
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Multiple | One ISDN port can support a maximum of 10 | • 1.1.1.4 | |
Subscriber | MSNs for routing incoming calls. | Multiple | |
Number (MSN) |
| Subscriber | |
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| Number | |
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| (MSN) Ringing | |
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| Service | |
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Calling Line | Sends the caller’s telephone number to the | • 1.20.1.2 | |
Identification | network when making a call. The called party | Calling/ | |
Presentation | can see the number on his telephone display | Connected | |
(CLIP) | before answering the call. | Line | |
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| Identification | |
Connected Line | Sends the telephone number of the answered | ||
Presentation | |||
Identification | party to the network when answering a call. The | ||
(CLIP/COLP) | |||
Presentation | caller can see the number on his telephone |
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(COLP) | display when the line is connected. |
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Calling Line | Prevents the caller’s CLI being presented to the |
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Identification | called party by the caller. |
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Restriction (CLIR) |
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Connected Line | Prevents COLP being sent by the answered |
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Identification | party. |
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Restriction |
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(COLR) |
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Subaddressing | You may add digits after the telephone number. | – | |
(SUB) | These digits will be passed to ISDN terminal |
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Transmits a specified volume of the data through | – | ||
Signalling Type 1 | the D channel between the ISDN terminal |
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devices of different PBXs using UUS types 1. |
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Advice of Charge | The PBX can receive the call charge information | • 1.20.1.3 | |
(AOC) | on ISDN lines from the telephone company. | Advice of | |
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| Charge (AOC) | |
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Call Forwarding | Forwards an incoming call to another outside | • 1.20.1.4 Call | |
| party using the ISDN service of the telephone | Forwarding | |
| company. | ||
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| ISDN | |
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| • 1.20.1.5 Call | |
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| Forwarding | |
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| ISDN | |
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