to display full responsive link units

LATEST OFFERS Latest BSNL Prepaid Mobile Plans                 Latest BSNL Full Talk Time Offers                  Latest BSNL 4G / 3G / 2G Data Offers              Download Latest BSNL Tariff Cards                               BSNL : Frequently Asked Questions / Doubts ???


An ISDN subscriber can establish two simultaneous independent calls (except when the terminal equipment is such that it occupies two 'B' channels for one call itself like in video conferencing etc.) on existing pair of wires of the telephone line (Basic rate ISDN) where as only one call is possible at present on the analog line /telephone connection. The two simultaneous calls in ISDN can be of any type like speech, data, image etc. 

The call setup time for a call between two ISDN subscribers is very short, of the order of 1 to 2 seconds. ISDN also supports a whole new set of additional facilities, called Supplementary Services.

Types of Accesses

There are two types of "accesses" (connections) for ISDN.

1. Basic Rate Access(BRA): 2B+D 
  • 2 Channels of 64 Kbps for Speech And Data
  • 1 Channel of 16 Kbps for Signalling
2. Primary Rate Access (PRA): 30 B+D
  • 30 Channels of 64 Kbps for speech and data
  • 1 Channel of 64 Kbps for signalling

🔍Search Here for Latest Tariff Updates...👇

It looks like you're using an ad blocker. That's okay. Who doesn't?
But without advertising-income, we can't keep making this site awesome.
Please disable your ad blocker and then reload the page to continue enjoying our site.
Reload Page