We have a CCM (hq and branch site) with one gateway setup in each location as h323.
If CCM goes down and phones register to gateways for SRST, I need some help understanding the call flow when CCM is down.
Example, in normal condition our voip dial-peer points the 4 digit destination-pattern to CCM. But when CCM goes down and those phones register to gatekeeper, how do incoming calls know to "not" go to CCM? Is it because dial-peer will fail to CCM and phones that registered now have "virtual" pots dial-peers for each one that will allow calls to be routed appropriatly to those phones?
What about if one uses CME for SRST. Phones/dial-peers are already created. So how would calls correctly get routed to CCM in normal condition and only to CME registered phones only when CCM is down? Is that becuase even though the ephone ephone dn's were created (which creates virtual pots dial-peers), since the phones are "not connected" the call will go to ccm via voip dial-peer that points to it?