Polycom conf. issues really weird???

[altolabado]

Question: Really weird. We are using a company for our conf. calls that supply us with a local number to access the service. When we dial it through a digital phone (being 2616, 3904 or any 2000/3000 model) it goes through always and connects to the initial automated message where it prompts for the password. Now, the problem is that when we dial this number on the polycom soundstation, it miss dials, sometime we get a lady that picks up or it seems that it is a real "hit miss" situation but more ofter than not a Miss. I think it was twice out of 10 attempts that I connected. I swapped out the unit once and I checked the wiring. Could this be a DNS problem or routing problem. I am stuck on this one.

 

[senk1s]

are you running off of the PBX analog extensions?

we've had problems and moved to direct CO lines and no problems

 

[srmega41]

Do you have the number of the lady you have called incorrectly and compared it to the number you are trying to call? It is possible the keypads could be giving you problems. Another check would be to put just an analog phone on the existing jack and try to dial. If the problem stays, could be a wiring issue out of the backplane or hardware issue at a card level.

Scott M.

 

[885758]

hi, altolabado:

I have met this problem before and I can give you some advice:

1. change the station parameter CLS LOL instead of CLS SHL;

2. use a direct line instead of PBX analog extension;

3. let your cabling system vendor reinstall the cable from your IT equipment room to your conference room.

Use step 1 you can almost resolve this problem but not thoroughly, use step 2 or 3 you can completely resolve this problem.

This situation is caused by the POLYCOM is too sensitive to the environment, I think.

Any further infomation, pls let me know.

Good luck!


Ray Deng
Shanghai, China

 

[johnpoole]

2. use a direct line instead of PBX analog extension;

3. let your cabling system vendor reinstall the cable from your IT equipment room to your conference room.

both of those seem a liitle extreme. i've never had a phone of any kind that worked on an outside line that would not work on a merridian. the cable may be an issue, but not if your using a standard cat 5 plan. post the tnb of that set. we need to know the port type before we can help. both the above steps assumes your using an analog polycom. i've got 60 or so analog poly's here on site, never had a misdial issue. since you've tried a different phone, maybe move swap that port, if your using the poly in the dip setting, that will cause your problem

john poole
bellsouth business
columbia,sc

 

[885758]

yes, it seems a littele extreme, but sometime it works.

In that case, I test a lot:

1. I use a analog phone(not POLYCOM) via a CO direct line, it's OK;

2. I use a analog phone via a PBX extension, it's OK.

3. I use POLYCOM via a CO direct line, it's OK;

4. I use POLYCOM via a PBX extension, the misdial situation appears, it doesn't depend on the TN, when I swap the port, same thing happens;

5. I use POLYCOM via a PBX extension with CLS LOL, the misdialing almost disappeared, but occasionally it doesn't work.

6. I use POLYCOM via a PBX extention with a open wire from the equipment room to the conference room, not through the cabling system, it's OK.

In another case it is also the cable that cause a M2250 misdialing, once we change the cable, everything works normally, very weird, isn't it?

Ray

 

[johnpoole]

ray, you have gremlins in your tie cable. most of my poly's are in conf rooms 1000's of cable feet from the switch. our tie cable is mostly old cat 3 trash, i don't see how cable can distort dtmf, unless your in a very high emf building. misdials occur under normal conditions when cable is freq distorted, ie certain freq's are almost filtered. not impossible, just haven't ran across it, but i've only been doing this 37 years. i don't doubt that you tested it to death, i would be very surprised if that solution worked for another building.. what is cld lol? not in my ld 10

john poole
bellsouth business
columbia,sc

 

[ArchTelecom]

altolabado, you asked if this could be a DNS issue. Is this an IP based product?

Most Polycom's I have had experience with are analog products.

I have had a similar situation though with a different product outputting DTMF via an analog port and, after much testingbetween us and the vendor end, we found that the DTMF levels (using test/measurement eq.) were slightly lower via the analog port...only because my device was putting out lower levels. These levels were considered acceptable though. After getting the LEC involved and even more testing, we found that the trunks from the local CO serving the vendor were out of spec, but not much. The CO fixed their trunks and we were good.

I am not so sure this is your problem, but sometimes the end devices (like the Polycom) have a little lower level DTMF output than your switch, and it may be enough to throw you off. Do you have a nother Polycom to swap with?