Using H323 GW to SRST fallback,yes you can in Lab IOS version: voice service voip h323 no h225 timeout keepalive ! For later IOS releases,
voice service voip h323 call preserve ! Now coming back to question , If br1 gateway was an MGCP gw, then on fallback from CCM, calls will be preserved by default. * http://www.cisco.com/en/US/docs/ios/voice/cminterop/configuration/guide/vc_ucm_mgcp_gw.html *<http://www.cisco.com/en/US/docs/ios/voice/cminterop/configuration/guide/vc_ucm_mgcp_gw.html> Benefits of Cisco Unified Communications Manager Switchover and MGCP Gateway Fallback •Eliminates a potential single point of failure in the VoIP network by allowing you to designate up to two backup Cisco Unified Communications Manager servers. Your MGCP voice gateways can continue working if the primary Cisco Unified Communications Manager server fails. •Ensures greater stability in the voice network by preserving existing connections during a switchover to a backup Cisco Unified Communications Manager server. •Prevents call-processing interruptions or dropped calls in the event of a Cisco Unified Communications Manager or WAN failure. Rgds On Wed, Jan 21, 2009 at 10:11 AM, Ryan Trauernicht <ryanstudyvo...@gmail.com > wrote: > You can not preserve calls from MGCP to SRST. > In the IOS of the code on the lab I dont think you can preserve the calls > from H323 to SRST (even though they are 1 in the same) > > Thanks, > Ryan Trauernicht > > On Tue, Jan 20, 2009 at 1:52 PM, kamal yousaf <lovingprin...@gmail.com>wrote: > >> Is it possible to preserve calls from Br1 MGCP gateway when it falls back >> into SRST mode ? I know calls can be preserved while using H323 gateway but >> not using MGCP gateway since L3 binding is terminated from gateway to CCM >> when falling back to SRST mode and hence calls cannot be preserved ? >> >> Any thoughts on this. >> > >
