[VoiceOps] full to compact header conversion

Quite. I've been involved in irritating 3-way conversations with "we do UDP only, just fragment over that IPSEC tunnel we require that decreases the MTU a bit" VZB and "Oh, no we'd never fragment in response to ICMP and if you lower the MTU, it'll just change the point at which we switch over to TCP" Acme. I have yet to find an elegant solution that fixes the problem for real, though various size reduction exercises pretty much make the problem go away for any sane call flow. --Jon Radel David Hiers wrote:

That's the book answer (18.1.1), but some carriers are UDP only.