I followed some documentation to configure MVA, and it is working fine. I did some tests and I could make it work using harpinning or not... For the E1 R2-Digital links I used hairpinning and for E1 ISDN PRI links I could make it without hairpinning.
But I have some doubts regarding the implemantation...
1) Why do I need to use hairpinning if using R2-Digital links?
2) Every document I read say I should have a MVA DID and a MVA DN. What's the difference between them? I know the DID is the number someone from PSTN should dial to reach the application, but what about the MVA DN I configure in Media Resource? And why should they be different from each other?
Whats MVA DID?
Whats MVA Number?
Here's why we have two conventions
Lets say we have a CUCM cluster servicing users in 10 different countries.
So we need 10 different local MVA Numbers so that users can dial-in locally right?.
These numbers are the MVA DIDs.
Btut.. the point to be noted here is Single CUCM Cluster can only have ONE MVA DN(MVA Number). So at each site, we will have h323/SIP Gateway, where when calls come in on the MVA DID(Local PSTN Number) we invoke the service Mva on the dial-peer.
We will need to translate MVA DID --> MVA DN, which then matches a MVA outgoing voip dial-peer with
dial-peer voice 1 voip
destination patter (MVA_DN)
So once the User is authenticated via VXML, and once the called number is collected , the GW will establish a voip leg to the MVA number on the CUCM
PS:Rate useful posts
Thank you!!! It was really helpful!
But the weird thing is that I have the following dial-peers on my H.323 gateway:
dial-peer voice 4499 pots
incoming called-number 4499
dial-peer voice 44991 voip
session target ipv4:
So the MVA DID is 4499 (this is the number sent by the carrier) and the MVA DN is 2499.
In CUCM, the ext. 2499 is configured in Media Resources and 4499 is configured in Service Parameters.
No translation patterns were created. And it is working fine like this.
So for testing purposes, I removed the dial-peer 44991. And it keeps working!
Shouldn't it be unable to complete the call?
Can you please help me in detail to configure MVA for different sites.
My setup is like below,
CUCM cluster at Site - A (MVA configured with DID number using H323 gateway & working fine)
I want to configure DID number from site B as a MVA number for users at site B. (I have MGCP gateway & need to hairpining for site B)
How can i configure this so that my users at site B can dial local DID number & access MVA?
Since in india TRAI regulation says i should not merge VOIP & PSTN calls.
Please help on this in detail. If you have any specific document or configuration, pls share.