We have Cisco 2811 with CCME and also act as H.323 gateway for branch VOIP traffic. Cisco IP phones are registered in the router and there's a PRI E1 connection to PSTN cloud from the router. One Service provider offers SIP trunk.
Q1. Is it possible to configure SIP trunk in 2811 and enable calls between H.323, SIP & PSTN?
Q2. If possible, what are the pre-requisities ?
* Additional Resources
Q3. Highly appriciate if someone can provide sample configuration with simple dial peers to enable voice routing between SIP, H.323 & PSTN cloud?
The short answer is, yes. It is possible. Without knowing the details of your call flow, I can't really provide specific config guidance. In order to enable CUBE functionality (IPIPGW), you will need to add the following:
voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
For more details, please see the CUBE configuration guide:
As explained earlier Location-1 is connected with PSTN PRI e1 and 2 mbps data link.
E1 Number series: 038-42911XX
Local Extensions: 33XX
PSTN Access Code: 9 followed by 7 digits for local and 10 digits for national calls
Location 01 can directly dial location02 by using 4-digit extension (62x)
Local Extensions: 62X
PSTN Access C ode: 9 followed by 7 digits for local and 10 digits for national calls. These calls will connect to PSTN cloud through Location 01.
Location 02 can directly dial location-1 by using 4-digit extension (33xx)
In the proposed setup, the SIP trunk colored in red is introduced. Could you please help me to configure the SIP trunk in the 2811 router and route calls through it? For example assume we need to route PSTN calls through SIP trunk using access code 8 which is currently doing by access code 9. Also need to terminate incoming calls from SIP trunk to 3300 extension. Please check whether the current IOS is capable?
If you require any further details, please let me know.
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