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Any ideas on why the caller ID on an internal call goes away after the first ring. Phone keeps ringing but caller ID drops. The phones are 8410Ds Only happens on a couple of them. Rest are fine. I don't see any dif. in features between the working ones and the ones that disappear after first...

I'm trying to replace my 302A&B console with an 8434DX. I really don't need any of the console/attendant features. I set up a new ext. (XXXX) with the 8434D and I can point all outside calls to it by changing my trunk group. Problem is my dial 0. When I look at dial plan it shows 0 first digit...

I'm trying to upgrade some of the old Dig. phones to something a bit more modern. Can i use the 6400 series phones just by adding a TN2181 card? Switch is "G3siV4+m Software version G3V4i.07.0.007.1 Thanks....

I'm in the process of getting together a crash kit for our sys.. 85 G3. Carrier A has 631DA1 and 631DA2 Carrier B 631WA1 and 631WB1. Same on carrier D as on B. Carrier C has a 631WA1 and a 631BR. Is that 631 BR interchangeable with the 631WB1? Any other suggestions on what cards to get...

We have a G3 V4 that is currently running around 375 analog sets and 20 dig sets in a condo environment. One console,no VM, no call acct. About 30 GS trunks all on copper. Pretty simple setup. Our contract with local DT provider is about up and mgmt. wants to either upgrade sys or look at...

I'm trying to add an S202A speakerphone to a 7444. Speaker powers up via existing power supply but the only thing I can do with it is change level on volume. No sound from speaker, speakerphone light will not come on when button pressed, Are they compatible or do I need additional, different...