[Users] Openser as proxy

[Jimmy Montano]

Greetings

we are running a SIP server provided by Portaone, don't know what they
did to the config but their SIP server (I guess it's IPtel's SER) but
it doesn't allow eyebeam softphone to use peer-to-peer presence info.

It's there any way for us to use Openser as a proxy to Portaone's SER
so that users may place call and also have presence information
available?

Thanks in advance

Jimmy