T7406 Display/Keyboard Weirdness

[norm411]

I have an interesting one... MICS 832, 7.1 ver 30DEC12 NAT, nearly maxed-out with M7310s, a few 7308s, four doorphones, and six T7406 on two base stations. Works fine. Except recently, one of the 7406s has developed an odd behaviour: after dialing the first digit, the second digit does not display. Entering the third digit displays the second, the fourth displays the third, etc. The keyed digits are actually entered. Applies to both intercom and outside calls, whether pre-dialing or on a selected line.
To call my desk phoe:
dial 2 - display 2
dial 3 - display 2
dial 2 - display 23
press IC - display 232, target rings.

This only happens on one handset, none of the others on that base station. I've power-cycled the handset (battery pull) to no avail. The set is still usable, but as a user-interface, it's not very friendly. Anyone ever see this?

 

[norstarboy125]

Sounds like it's time to replace that handset, if your using 7406 non e you should move to the e model as they seem to work a little better.

Charm City Communications

http://www.charmcitycommunications.com

 

[norm411]

Doesn't the "e" use a different base station? Not looking to swap out the whole set. Also, I'd heard the "non-e" with its external antenna actually worked better, but never had a chance to compare.

As for the troublesome handset itself, it's not a hardware issue as all the keys and the display work - and the software is functional, albeit in a weird mode. Also tried power-cycling the base station; no difference.

 

[norm411]

(never mind my first question re base stations - a little research answered that). Still thinking there must be a way to get the handset out of delayed-display mode. I have a vague memory of it having happened before, but none of how I fixed it, or it fixed itself.