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Logical Channels

By Dinesh Thakur

The terminal connected to the packet switched network can communicate with multiple terminals at the same time using a single physical line. This makes it possible to set multiple logical paths called logical channels on a single physical line.

Multiple communication thus takes place through these logical channels. Based on the X.25 roles, 4096 logical channels can be set on a single physical line connected to a DTE. These 4096 logical channels can be grouped into 16 groups and each group containing up to 256 channels. These channel groups are known as LCGN (Logical Channel Group Number) and LCN (Logical Channel Number) as shown in Figure. When data is transferred over virtual circuits, specific channel numbers and channel group numbers are allocated for use by all packets included in that transfer.

Logical Channels

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About Dinesh Thakur
Dinesh ThakurDinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps.

Dinesh Thakur is a Freelance Writer who helps different clients from all over the globe. Dinesh has written over 500+ blogs, 30+ eBooks, and 10000+ Posts for all types of clients.


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