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What is the CIC in ISUP?

+2 votes
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What is the CIC in ISUP?
posted Jan 19, 2015 by anonymous

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2 Answers

+1 vote

CIC means circuit identification code in ISUP. As ISUP is used in call control of a switch or MSc its job is to reserve the resources i.e. circuit (logical) for call to route. CIC is the identification of these circuits.

answer Jan 20, 2015 by Salil Agrawal
0 votes

It provides information on which trunk the voice call needs to be carried.
There will be E1/T1 links (32 or 64) between the A and B parties..

In that one E1 link can carry 30 calls. which link to carry will be decided by this CIC (Circuit Identification Code)

answer Jul 9, 2015 by Nithin Kp
Similar Questions
+1 vote

As per some specification and my knowledge it seems ISUP can be over SCCP or SUA protocol. My questions here are -
1. How practical it is, it it rarely practiced or commonly followed.
2. What is the advantage at the network level if we do so.

0 votes

I was referring the rfc4666 for M3UA and have few concerns regarding the DUPU SSNM message. The specification says that a DUPU indicates the unavailability of a certain user part.
If I may quote "The DUPU message is used by an SGP to inform concerned ASPs that a remote peer MTP3-User Part (e.g., ISUP or SCCP) at an SS7 node is unavailable"
I have two questions.
1. How these concerned ASPs are identified. Is it upon receiving a MTP-Transfer for a particular user part (say SCCP) or can it be sent periodically for a given ASP ?
2. I could not find any SSNM message that indicates a User Parts Availability. Am I wrong here to expect such a message and if so how come a concerned ASP know if a certain User Part is available at a given point code.

It would be an immense help if anyone could clarify the aforementioned concerns.

+1 vote

Lets say any messages went in TCAP END for which I need not get any ACK back.
I really dono why a node will send any message in TCAP end!

Is it intentionally node is sending or happening due to some cause ?

+6 votes

Where SS7, H.323 and SIP are used in VOIP network ?

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