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общая лексика
D-канал
дополнительный 16 кбит/с канал сети ISDN для задания конфигурации B-каналов. Соединяет абонента с АТС
Смотрите также
D channel (delta channel) is a telecommunications term which refers to the ISDN channel in which the control and signalling information is carried.
The bit rate of the D channel of a basic rate interface is 16 kbit/s, whereas it amounts to 64 kbit/s on a primary rate interface.
For DSS1 signalling, the D channel layer 2 protocol is Q.921 also called LAPD and it carries Layer 3 messages according to Q.931 protocol.