| There are loads of systems that will handle digital and ip phones.
I only use ip phones for remote sites, you can have sip trunks, ISDN or pots on most modern systems.
don't for get the hidden costs of ip phones with POE switches or power supplies at each telephone.
you can link systems with gateway cards making the other offices on the telephone network for internal calls (free) and transferring calls, but not depending on the link to do normal business |