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ISDN Protocol (e,g, Q931:X, DASS, DPNSS) |
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Usually provided for customers PBX or other telephony equipment. Connectivity is a 2mb/s circuit providing:
- 1x64k D Channel which controls call set up and clear down
- 30B channels that can be used for voice calls
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C7 Protocal (e.g. BTUP, ETSI ISUP, ANSI ISUP) |
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Usually configured for interconnect circuits between carriers. Connectivity is a 2mb/s circuit or group of 2mb/s circuits providing:
- Ingress/egress (route) between carriers
- Signalling links control call setup and clear down, provided on a 2x64k channels over the first 2mb/s circuits of the route.
- The rest of the channels are used for speech. |
