[cisco-voip] H323 Enhanced Call Preservation and Media Inactivity Detection

[Robert Kulagowski]

Jason Aarons (US) wrote:
> I shutdown (start/shutdown, maybe I should have just pulled the NIC?) my
> subscriber with my phone showed Active Registered, my CP-7941G-GE
> running 8.2(2)SR1S dropped the call, phone shows CM Down, features
> disabled, then registered with publisher. Test was not the desired
> results!
> 
> voice service voip 
>  allow-connections h323 to h323
>  h323
>   call preserve
> 
> IOS is 12.4(11)T2

Well, because we're single threaded over the WAN, our situation is that 
we lose connectivity to _all_ CMs, not just one.

Did you try pulling your "WAN" connection instead of shutting down a CM?

We use:

voice service voip
  fax protocol pass-through g711ulaw
  h323
   call preserve limit-media-detection
  modem passthrough nse codec g711ulaw
!
!
voice class codec 1
  codec preference 1 g711ulaw
  codec preference 2 g729r8
!
!
!
voice class h323 1
  h225 timeout tcp establish 5
   call preserve

works on 2851 / 12.4.9(T)