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Explain in detail V5-BCC protocol?
ferna 09-January-2008 12:12:25 PM

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Telecom Portal with Freelance, Answers, and Video Resume.
please visit
en.wikipedia.org/wiki/V5_interface

Posted by waqasahmad


For details:

www.protocols.com/pbook/v5.htm
en.wikipedia.org/wiki/V5_interface
Posted by sagitraz


The V5-BCC protocol provides the means for the LE to request the AN to establish and release connections between specified AN user ports and specified V5-interface time slots. It enables V5 interface bearer channels to be allocated or de-allocated by independent processes (on a per call, preconnected or semi-permanent basis). There may be more than one process active at any one time for a given user port.

The format of the BCC Protocol is as follows

function Octet
Protocol discriminator 1
BCC Reference Number 23
Message type 4
Other Information Elements etc.

Protocol discriminator
Distinguishes between messages corresponding to one of the V5 protocols.
BCC Reference Number
The BCC Reference Number information element is specific for the BCC protocol and uses the location of the Layer 3 address information element within the general message structure as defined in Layer 3 protocols.
The BCC Reference Number identifies the BCC protocol process, within the V5.2 interface, to which the transmitted or received message applies.
The BCC reference number value is a random value generated by the entity (AN or LE) creating the new BCC protocol process (this random value is implemented as a sequential generation of values). It is essential that values are not repeated in messages for which a different BCC process is required (in the same direction), until the old BCC process has been finished and the number deleted. The BCC Reference Number information element, being part of the message header, shall be the second part of every message (located after the Protocol Discriminator information element). In the case of any process generating error indications, the BCC reference number should not be re-used until sufficient time has elapsed for delayed arrival of messages containing the same BCC reference
Source ID
One bit field specifying the entity (LE or AN) that has created the BCC reference number (i.e., the entity that has created the BCC protocol process). The coding of this field shall be zero for an LE created process and one for an AN created process.
BCC reference number value
13 bit field used for providing the binary coding that identifies the BCC process.
Message type
Identifies the function of the message being sent or received. Message types may be as follows:
• ALLOCATION
• ALLOCATION COMPLETE
• ALLOCATION REJECT
• DE-ALLOCATION
• DE-ALLOCATION COMPLETE
• DE-ALLOCATION REJECT
• AUDIT
• AUDIT COMPLETE
• AN FAULT
• AN FAULT ACKNOWLEDGE
• PROTOCOL ERROR
Other Information Elements
The following IEs are specific to BCC:
• User port identification
• ISDN port channel identification
• V5-time slot identification
• Multi-slot map
• Reject cause
• Protocol error cause

Posted by Stevendixson

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