IP Office connected to Cisco Phone System

[Jcfoster]

I have a client that we do all their infrastructure cabling. They use a Cisco phone system at their office. For some reason they cannot put a Cisco system at the owners home. They asked if we put a new IP Office at his home would we be able to tie it to the Cisco phone system for internal calls like four digit dialing. The IP office would be new with 10.1. Is this possible and if so what would need to be purchased and configured on the IP Office side. How would it work on the Cisco side? Right now I know nothing about their Cisco phone system other than it is new. Any help of info would be appreciated.

Thank you.

 

[amriddle01]

Easy enough to do with site to site SIP trunks linking the two. Easy that is, if you know how to do them on the IP Office and they know how to on the Cisco. Only way to do it really.
Knowing the types of people that do Cisco systems quite well, they aren't very good at the telephony side in my experience

 

[busster]

Why not create a vpn connection between the office and users home, then use Cisco phones?