Incoming calls not directed to 5410/5420

[manzas]

The current 5420 (the receptionist's phone) has intermittent to no dial tone, so outgoing calls are not practical. The phone rings during incoming calls...

[kclint]

Can anyone help!
Ive got the 5420 but for some reason my EU24 has stopped working. i ordered a new one that for some reason that don't seem to be...

[theryano51]

Hello, I am trying to find a way to collect Serial Numbers from our Avaya 5410 phones without having to physically go to each phone and look on the bottom....