Analog Lines getting intermittent dialtone

[Ivan917]

The customer has an IP Office 500V1 5.0 with 2 digital 8/ATM 4 cards. They have all phones programmed with Line
Appearance buttons. When the customer goes off hook they receive a intermittent unevenly spaced "stutter" dialtone. I bridged the lines with my buttset and heard the stutter at which point I removed the line from the IP Office and the stutter stopped on my test set. I also noted that when the line was removed from the system the erratic dialtone continued on the system. I thought with a line appearance button the dialtone received was the actual line dialtone and unplugging the line would remove the dialtone. In any case, I'm thinking the analog daughter boards may need replacement. I powered the unit down and re-seated both cards but the issue remains. It also seemed that after about 10 minutes after the reboot the issue cleared up but it does return randomly. When the stutter is occurring no outbound calls can be made. Anyone run into this issue? Ideas?

Thanks!

 

[Telecomboy]

Do you get the stutter dial tone when going off-hook on an internal line? If so, that is a signal that dnd/send calls/forward is on for that phone.

If you cannot make outbound calls, that is a separate issue. I would run Impedence Match for each line. This takes 5-10 minutes to run for each line and a reboot is required once finished and you send the config, but Impedence Match should always be run for analog lines.

 

[mikedphones]

Just curious, who is the carrier? Cable, Verizon, Verizon Fios, etc?

 

[Ivan917]

The vendor is Century Tel I believe. Unfortunately I don't have the test equipment for the impedence test. Is there anything in System Status or Monitor that I could use?

 

[Telecomboy]

Impedence match is done via Manager. Go into Manager, click on the first line, go to the analogue options, Click start on Impedence Match. It will take 5-10 minutes to complete and when it does it will say "use xxxx for this line" and click yes. it will say "use xxx for all lines on this card". Click no. Click ok to save this change for this line and go on to the next line. Once you have done it for all lines, save the config which requires a reboot.

 

[Ivan917]

Thanks, I will try the impedence match later this afternoon as I am on another job. As far as not making outbound calls I think the stutter is masking some of the dtmf tones while dialing. Does the line need to be placed out of service while running the test I would assume?

 

[Telecomboy]

It will busy the out while it is running the match and nobody can be on the line when you start it or else it won't allow you to start it.

 

[Ivan917]

Ok, the problem appears to have mysteriously gone away. I still ran the impedence match, saved the settings and rebooted. The problem was there for maybe 30 seconds after the reboot but then cleared and has been gone ever since. Must be gremlins. Thanks for the tips!