what'll happen if one isup link gone down?
to brief this question...isup link is active between two
nodes.if one goes down what are all the messages will be
transfered to active node(bit wise,MTP wise)?
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Answer / ameen farook
The telephone exchanges are connected via E1 or T1 trunks
which transport the speech from the calls. These trunks are
divided into 64 kbit/s timeslots, and one timeslot can
carry exactly one call. Each timeslot between two switches
is uniquely identified by a Circuit Identification Code
(CIC) that is included in the ISUP messages. The exchange
uses this information along with the received signalling
information (especially the Called Party Number) to
determine which inbound CICs and outbound CICs should be
connected together to provide an end to end speech path.
In addition to call related information, ISUP is also used
to exchange status information for, and permit management
of, the available timeslots. In the case of no outbound CIC
being available on a particular exchange, a release message
is sent back to the preceding switches in the chain so a
new route can be tried.
| Is This Answer Correct ? | 7 Yes | 3 No |
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