MWI on Cortelco analog phones

[JustMack]

Help! We just migrated several users from an NEC IPX system to our Avaya switch. They had message waiting indicators on Cortelco analog phones that worked on the NEC but don't work on the Avaya. We're thinking that the phones may use either FSK signaling or neon, because it is apparently not LED. Does anyone know how the message waiting lights are lit on a Cortelco analog phone?

Thanks!

 

[JustMack]

Nevermind. I found that some of the Cortelco phones have a 24v-90v switch. This allows me to use the LED setting on the station form when this is set to 24v.