Hi there, Just a general question here, does anyone know how the gateway in CUCM knows which CSS used for routting the outbound call?
It doesnt! once CUCM has made a routing descision to route a call to a certain H323 gateway, it has passed CSS's and patterns, and uses H323 to hand off the call outbound. Once the request lands on the H323 gateway, it uses dialpeers to send the call out the PSTN.
CSS's configured on H323 gateways, are predominately used for inbound call class of control
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