We have deployed VoIP 2 years ago. It is CCME 3.1 based on 2811 router and 34 phones - 7912G.
Now we want to expand the number of phones, so what solution we need to minimize migration tasks and keep old (34 ) phones in use?
I see this solving:
CISCO3845-CCME/K9 3845 Voice Bundle w/ PVDM2-64,FL-CCME-240,SP Serv,64F/256D
What interface card I need to channelize this voice gateway with our PBX (E1)?
Will it support 7912G phones and what new phones of the same class we need to buy ?