I did configure the CallManager (4.2(3)) to dial out via overlap sending (Route Pattern: 0.00! "allow overlap sending" ticked). And the gateway 12.4(8)c as...
voice service voip
h225 timeout t302 15
h225 signal overlap
modem passthrough nse codec g711alaw
dial-peer voice 1000 pots
This works fine as long as the phones are registered to the CallManager, but stops working as soon as the phones get into fallback mode. In Fallback mode, only one digit "0" is send out and does not accept further digits.
But as soon as I configure the destination pattern as...
... dialing works in Fallback mode, but overlap sending not anymore in normal operation, as the destination pattern is waiting for the remaining numbers :(
Does anyone know how to configure the destination pattern to work as overlap sending in both modes?
overlap sending does not work with a route patter 0.00!. A "!" always waits for an interdigit timeout.
in srst mode gateways does not provide overlap sending. therefore you must configure 2 dial-peers on the gateway. First pots dial-peer for ccm (destination-pattern = 0) to send the dialed digits in overlap and second pots dial-peeer (destination-pattern = 0T) only for srst mode. To avoid matching of the first dial-peer in srst mode you must add cor (class of restriction) in your srst and dial-peer configuration.