[cisco-voip] SIP Trunk to Paetec ITSP

[Matt Slaga (US)]

If you are willing to open up SIP (5060) and UDP range (usually 16384-32768, but I've seen some SIPTs require 1024-65535) through the firewall, you can terminate directly to UCM 4.1 and later (UCM 5.x and later preferred).  Obviously, this is not the recommended solution.  I'd love to see Cisco add this functionality to their ASA as kind of a SIP-proxy/edge to allow SIP trunks through to UCM directly but still be protected.  I hear that functionality is coming for Microsoft with the next Microsoft OCS release.

You may require an advanced IOS gateway with DSPs to handle DTMF conversion if the SIP provider only supports inband dtmf.

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of tednugent73 at gmail.com
Sent: Friday, June 19, 2009 12:38 PM
To: Cisco VoIPoE List
Subject: [cisco-voip] SIP Trunk to Paetec ITSP

Has anyone had any experience (good bad or otherwise) with SIP Trunking to Paetec/USLEC? I have a new client that has ordered SIP Trunks at 3 locations through Paetec. They are looking for us to help them implement the solution in 3 weeks and I'm not seeing any CUBEs or IADs on the order and of course Paetec has assured them that they are not required...? I'm coming into this late as the "design" (or lack thereof) is already in place and I'd like to know if there is anything that I should be ready for. I don't have a ton of experience with SIP trunks, at least not with Paetec but I know that faxing is always an issue and you'd need CUBE at a minimum just to get that working, anything else or any other comments on Paetec or SIP as a whole? TIA for any insight.



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