SIP vs ATA

[ipohead]

Hardware and licencing aside is there any real difference in a SIP trunk delivered direct to the IPO and an analogue trunk from the ISP's router's built in ATA?

 

[teletechman]

SIP allows a lot more flexibility, you can have DIDs with SIP trunks not with Analog. You also have call control when twinning with SIP, with Analog you can only do basic forwarding of the calls. SIP generally costs less also. To add trunks in SIP it is just a license and some programming with Analog you need a visit from the provider and the PBX vendor to install them.
Mike

 

[critchey]

SIP to analog is also almost a guaranteed quality issues if you run IP phones. There is already documentation about true analog lines with IP phones and some solutions published by Avaya. In this case the call is converted from SIP to analog and hits the system then gets converted back to IP for the phones. None of the posted solutions work and you end up with an upset customer.

The truth is just an excuse for lack of imagination.

 

[IPGuru]

Yes
Hosting the sip direct on the IPO rather than throug an AT geves better reliability & also enable DDI (DID) call routing


Do things on the cheap & it will cost you dear

Avaya Remote Support Engineer (A.R.S.E)