Large home 2 COs, 20 extensions, two door bells. Have an old and malfunctioning TA-624. Can I easily upgrade to the TA-824? Can I use the same add-on cards to provide support for the door bells and the extra 16 extensions or is that a bad idea?
We have a variety of Panasonic phones: T7135s, T7030s, two T7730s and three multi-line cordless phones T7895s. On one extension, we use an old-fashioned Panasonic TM100B answering machine.
I am familiar with programming the system, and I see that there is free software to program the TA-824.
This seems a straight-forward upgrade. Any caveats or suggestions?