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- B_channel abstract "B channel (bearer) is a telecommunications term which refers to the ISDN channel in which the primary data or voice communication is carried. It has a bit rate of 64 kbit/s in full duplex.The term is applied primarily in relation to the ISDN access interfaces (PRA or PRI and BRA or BRI), since deeper in the PSTN network an ISDN bearer channel is essentially indistinguishable from any other bearer channel.Apart from any transmission errors, the purpose of the network is to carry the contents of the B channel transparently between the endpoints of the call. Exceptions to this general principle include:If one or more trunks on the route between the endpoints employs Robbed Bit Signalling, this will result in frequent bit errors in the least-significant bit of bytes transported by the channel, effectively limiting the channel to 56 kbit/s.If the call has been established as a long-distance voice call, then echo cancellers may be being employed. While these improve the quality of the channel when it is used for voice communications, they render the channel essentially useless for data communications purposes (whether modulated or not).International voice calls may include A-law to μ-law conversion, which also impairs the channel when used for data communications purposes.Long-distance voice calls may also employ some form of voice compression, typically provided by equipment such as DCME.In order to assure the usability of the channel for data communications, the following measures are at the disposal of users:ISDN terminal equipment can specify the required Bearer Capability when establishing the call.If the call is being set up as a voice call between modems, then a 2100 Hz answer tone sent in the backward direction during the initial seconds of the conversation phase of the call will result in any echo cancellers or echo suppressors being disabled for the remainder of the call.".
- B_channel wikiPageID "521752".
- B_channel wikiPageLength "2397".
- B_channel wikiPageOutDegree "25".
- B_channel wikiPageRevisionID "703540855".
- B_channel wikiPageWikiLink A-law_algorithm.
- B_channel wikiPageWikiLink Answer_tone.
- B_channel wikiPageWikiLink Basic_Rate_Interface.
- B_channel wikiPageWikiLink Bearer_Capability.
- B_channel wikiPageWikiLink Bit_rate.
- B_channel wikiPageWikiLink Category:Integrated_Services_Digital_Network.
- B_channel wikiPageWikiLink Channel_(communications).
- B_channel wikiPageWikiLink Communication.
- B_channel wikiPageWikiLink D_channel.
- B_channel wikiPageWikiLink Data.
- B_channel wikiPageWikiLink Digital_Circuit_Multiplication_Equipment.
- B_channel wikiPageWikiLink Duplex_(telecommunications).
- B_channel wikiPageWikiLink Echo_suppression_and_cancellation.
- B_channel wikiPageWikiLink H_channel.
- B_channel wikiPageWikiLink Integrated_Services_Digital_Network.
- B_channel wikiPageWikiLink M_Channel.
- B_channel wikiPageWikiLink Primary_Rate_Interface.
- B_channel wikiPageWikiLink Public_switched_telephone_network.
- B_channel wikiPageWikiLink Robbed-bit_signaling.
- B_channel wikiPageWikiLink Speech_coding.
- B_channel wikiPageWikiLink Telecommunication.
- B_channel wikiPageWikiLink U_Channel.
- B_channel wikiPageWikiLink Voice_message.
- B_channel wikiPageWikiLink Μ-law_algorithm.
- B_channel wikiPageWikiLinkText "B channel".
- B_channel wikiPageWikiLinkText "B-Channel".
- B_channel wikiPageWikiLinkText "bearer channel".
- B_channel wikiPageUsesTemplate Template:Unreferenced.
- B_channel subject Category:Integrated_Services_Digital_Network.
- B_channel hypernym Term.
- B_channel type Protocol.
- B_channel comment "B channel (bearer) is a telecommunications term which refers to the ISDN channel in which the primary data or voice communication is carried.".
- B_channel label "B channel".
- B_channel sameAs Q353607.
- B_channel sameAs বি_চ্যানেল.
- B_channel sameAs B-Kanal.
- B_channel sameAs m.02l3ts.
- B_channel sameAs Q353607.
- B_channel wasDerivedFrom B_channel?oldid=703540855.
- B_channel isPrimaryTopicOf B_channel.