ISDN:
Ø ISDN is defined by the ITU-T.
Ø ISDN is used to support wide range of voice (telephone calls) and non-voice (data exchange)
Ø ISDN is defined by the ITU-T.
Ø ISDN is used to support wide range of voice (telephone calls) and non-voice (data exchange)
applications in the same network.
Ø The primary application of ISDN is to provide both circuit and packet switching, but ISDN also
Ø The primary application of ISDN is to provide both circuit and packet switching, but ISDN also
supports non-switched connections. The fundamental building block of ISDN is a 64 kbit/s
switched digital connection.
Ø The two most common methods for providing ISDN access at a customer’s premises are called
Ø The two most common methods for providing ISDN access at a customer’s premises are called
Basic Rate Access and Primary Rate Access. Basic Rate Access consists of two 64 kbit/s channels
and one 16 kbit/s channel, whereas Primary Rate Access consists of up to 30 64 kbit/s channels
and one 64 kbit/s channel.
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