Trunk Problems

[tomskillman]

One of our incoming trunk lines seems to be having an odd difficulty. If you disconnect the trunk from the system, it rings a test set and answers fine. Connected to the system, when you dial, it clicks like it answers, but you never get the greeting and menu system. Also, when connected to a test set, you never get a dialtone. Incoming line is ground start. Pasted below is the trunk's TN

DES 664-0657
TN 004 1 02 00
TYPE COT
CDEN 8D
CUST 0
XTRK XUT
TIMP 600
BIMP 3COM
NCOS 0
RTMB 1 6
ATDN 495
SIGL GRD
SUPN NO
AST NO
IAPG 0
CLS UNR DTN WTA LPR APN THFD
P10 NTC LOL
TKID
DATE 16 MAR 1998

Could this be some equipment failure at the CO even though I can answer a call using the test set?

Thanks

Tom Skillman
tskillman@stlwater.com
City of St. Louis Water Division

 

[tomskillman]

Also, system is a Meridian 51C Release 23.

 

[Reusser]

try reversing polarity

 

[acewarlock]

hen you use the test, did you put a grd on the TIP or RING to see if you get dialtone then?

 

[tomskillman]

I tried grounding both tip and ring - neither generated a dialtone. Haven't tried reversing yet, but I'm not convinced that's the problem since grounding each one didn't yield a dialtone.

 

[acewarlock]

Sounds like a telco problem then.

 

[johnpoole]

a slight ground on the ring side causes this problem.. if your not getting dialtone on the open pair, report the trouble.. BUT, if i read that right, remove the pbx and you can take an inbound call on that trunk with a butt set. if that is the case, it's either reversed or the card it also bad... lighting, will burn the carbon protection and might damage that card at the same time...

your trouble shooting seems to prove that both the trunk and the trunk card are bad

john poole
bellsouth business
columbia,sc

 

[tomskillman]

Well we called it into the Telco yesterday. They came out and had a bit of trouble isolating the problem, but it turned out the problem was an amplifier card at the CO. They wired around the card for the day since they didn't have a replacement and all was well. Today they replaced the card (although the on-site tech didn't think it was really needed) and we're back in business. Thanks for the replies - was just a weird situation, but now that I know what the problem was it makes sense. The tech said he could hear a very faint dialtone on the line.