atcomsystems.ca/forum Forums TDM Business Telephone Systems Comdial Telephones & Systems Executech

5Etek-mike
Meaning the caller is not forwarded out of the telephone system via the variable on the central office line. The caller remains on the flashing line button until the button is pressed (all 3 lines).

STS E
There are 3 stations that are experiencing the problem.

Excellent. Thank you for clarifying.

It's just with this type of problem, we need the most precise information.

Please reconfirm our understanding of exactly what's occuring >>> During the times that the "single-ring" problem is occuring on the 3 back office phones: During an incoming call, the customer receives only a "single-ring", however the line button continues flashing. Once the flashing button is pressed, the incoming call cannot be answered.

Is this precisely what's happening?

He said it can still be answerred when the flashing line button is pressed.
What system are we talking abuot here?
Heck, even a phone model # would give us a bit more to go on. The KSU model number is probably a letter followed by 4 numbers, like N0616 or something similar, although it could be somethng like E60-PT as well.

Presuming all is right with the CO, you may have these sets programmed for call forwarding. The XE and older series could not forward but the E40,60,80 series could do a call forward. Try canceling the feature.
A station will give one ring burst if it's forwarded.

I am starting to like the idea of simply unplugging one of the line cords from the KSU and plugging it directly into a 2500 set. It's important to do it this way to rule out any issues with the lines and cords. If the phone keeps ringing on an incoming call, then it pretty much points at the KSU ports being bad. If the 2500 set also only rings once, then it's definitely a telco issue. This most simplistic form of testing might be the fastest and most reliable means of troubleshooting the problem.

You might also want to check for any surge protectors on these lines and bypass them during testing. Defective ones or ones that are rated for voltages too low will clamp down on the ringing current while still allowing talk battery to flow.

I was thinking the same thing, CF to a station or a voicemail that no longer exists.
Maybe someone put it into night mode (I think that the "E" series had that feature...)?

I looked it up to double check and the E series has night service.
Pending further info, and because you say it comes and goes, my guess is you have an "E" series KSU (Executech 2000) and someone is putting it into night service by accident.

The Comdial is a GO816 Rev I with a GM408 RevB expansion module. The telephones are 7714S-FB telsets.
Thanks everyone for all of your help thus far.

Sorry for the mix-up as far as ksu type. There is no voicemail on the before mentioned telephone system.

Thanks,
Telephony121

Huge difference from any Executech sytem. You have a DSU.
Someone has a night service button programmed on their phone and is putting the system into and out of night service.