Multi site UCM6510 single pri


Does anyone know if it’s possible to interconnect two ucm6510’s over an exciting VPN tunnel and use a single pri from one end for incoming and outgoing calls.

Site is configured as follows

Site 1 ucm6510 1 full 24 channel pri

Site 2 ucm6510 no pri but connectivity to site 1 over VPN.

Anyone have some guidance if this is possible without any additional hardware being bought.?


Yes. First you make ext on UCM site 1
Register this account in Site 2 as register TRUNK.
Now work as usual.
If you need select covering number on PRI then it is much more problematic to do.