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Implementing QSIG with Call Manager and Legacy PBX

t.guerriero
Level 1
Level 1

‎03-13-2003 11:03 AM - edited ‎03-12-2019 11:03 PM

We are implementing a Legacy PBX with CM and Unity. We will have 2 PRI's to the PSTN and two PRI's with QSIG back to the legacy PBX. I know there is some fuctionality that may be lost, but I cannot find documentation that explains what will be lost. I know that CM 3.3 has added some QSIG support, but I have not seen 3.3 yet.

Any ideas?

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Wes Sisk
Cisco Employee
Cisco Employee

‎03-16-2003 10:45 PM

First make sure the CCM implementation of QSIG will work for you, CCM has implemented an ISO version of QSIG that is not compatible the ECMA versions. Currently CCM 3.3 does not support trunk release transfer so you could potentially use up lots of your trunks with hairpinned calls. This functionality should be forthcoming. Is there something specific you are worried about losing?

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