I have a branch that has a Mitel SX100 installed. Not sure of its age. Branch manager is complaining of being able to hear his assistants conversations and visa versa. The vendor that installed the system has replaced various things, ie line cards, trunk cards and even the power supply, and it is still having the problem. The issue usually occurs when an outside trunk is involved. I have had the LEC check all of the trunks and they say no problem. The last complaint even states that they are hearing their music on hold bleeding over...Anyone got any ideas? The branch manager is pulling his hair out.
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Cross talk
- Thread starter calhoony
- Start date
macphoneguy
IS-IT--Management
Well here's my .02cents I presume that any of the Extensions Have heard the other i.e. system wide, is it readily repeatable or interment?. in any Case If you bring one of the phones to where the Equipment is, do you hear the Cross Talk ? if you don't then I would tend to point the finger at the Station Cabling, a Pinched or otherwise bad cable\wire, going out to the phones, on the Trunks can you tell if it's a particular Trunk/s ? are they LS/GS or T1/pri ? I would also not dismiss EMI, from florsent lighting or other High Voltage, perhaps some RFI filter's might help.
Good Luck
Good Luck
- Thread starter
- #3
The trunks are LS/GS, and it seems to be intermitant, of course. I have had one of our inside techs down there and could not duplicate the cross talk. The vendor that has been working on the problem seems like he is just milking the issue to generate some extra revenue. He has replaced at least one trunk card and a couple of station boards and even the power supply. I am more familiar with the Avaya/Lucent PBX's than the Mitel product so I didn't know if this was something common with the SX100, like a buss problem, or just a vendor not knowing how to isolate the issue....
SX100? Well, it's over 15 years old to start with, maybe it's just an age thing. But, moving forward I'd look at EMI, I've seen many a 200's (analog) with the same problem (of which the 100 is based). I'd add RFI filters to all trunks, the MOH connection and to any station that has been reported to have been over heard. Crosstalk is usually in the cabling, never seen a line card solve a crosstalk issue before.
- Thread starter
- #5
MitelTech,
We know its old and we are going to be going to a VoIP solution with in the next 12-18 months, thats why we really don't want to replace it now. Are the RFI filters something you have to get from Mitel? The cross talk that is being heard is between the people in our office there. Not something that is being picked from RFI in the neighborhood..
We know its old and we are going to be going to a VoIP solution with in the next 12-18 months, thats why we really don't want to replace it now. Are the RFI filters something you have to get from Mitel? The cross talk that is being heard is between the people in our office there. Not something that is being picked from RFI in the neighborhood..
I realize it's not the neighbourhood you are hearing, but the trunks need to be done because you don't know if they are hearing it on trunks or local extension cabling. (Unless of course they specifically said they overheard an internal person-to-person call)
The filters can be picked up at any decent supply store, I forget where we got ours, haven't had to use them in a long time now, we no longer service any analog equipment.
The filters can be picked up at any decent supply store, I forget where we got ours, haven't had to use them in a long time now, we no longer service any analog equipment.
Since these are LS/GS there's a reall good chance it is occuring on the trunks so it might be worth checking the trunks during an off period when the system is not being used. I would not trust the Telco folks to have any idea if there were crosstalk - probably don't even know what the term means (Appologies to any seasoned LEC techs on the list - but you probably realize that this business t'ain't what is used to be).
Put a butt set on TRK 1 and a second butt set on TRK 2.
Pull dial tone on TRK 2 and call someone (time and weather for example). Now listen to TRK 2 and pull dial tone on TRK 1 and press and hold a DTMF digit. Do you hear crosstalk?
Next leave butt set 1 on TRK 1 and repeat the above with butt set 2 on TRKs 3 through X.
Next move butt set 1 to TRK 2. Repeat the above with butt set 2 on TRKs 3 to X. You don't need to put butt set 2 on TRK 1 since you tested it with regards to TRK 1 the first time around.
Next move butt set 1 to TRK 3. Repeat the above with butts set 2 on TRKS 4 to X.
etc etc.
If you do find crosstalk you will now know exactly which trunks are involved, and therefore can accuratley report this to the Telco (and you'll easily be able to test just those trunks when they claim to have fixed it). Now it is a simple case of following through with the LEC and making sure they fix it (topic for another thread).
good luck.
Put a butt set on TRK 1 and a second butt set on TRK 2.
Pull dial tone on TRK 2 and call someone (time and weather for example). Now listen to TRK 2 and pull dial tone on TRK 1 and press and hold a DTMF digit. Do you hear crosstalk?
Next leave butt set 1 on TRK 1 and repeat the above with butt set 2 on TRKs 3 through X.
Next move butt set 1 to TRK 2. Repeat the above with butt set 2 on TRKs 3 to X. You don't need to put butt set 2 on TRK 1 since you tested it with regards to TRK 1 the first time around.
Next move butt set 1 to TRK 3. Repeat the above with butts set 2 on TRKS 4 to X.
etc etc.
If you do find crosstalk you will now know exactly which trunks are involved, and therefore can accuratley report this to the Telco (and you'll easily be able to test just those trunks when they claim to have fixed it). Now it is a simple case of following through with the LEC and making sure they fix it (topic for another thread).
good luck.
PS
You might check the loop current on all of the trunks. I've heard of some PBXs that crosstalk only when the loop current is high. Mike Sandman has a very good tech bulletin on this:
Be aware that what Sandman considers "high" loop current is pretty conservative.
You might check the loop current on all of the trunks. I've heard of some PBXs that crosstalk only when the loop current is high. Mike Sandman has a very good tech bulletin on this:
Be aware that what Sandman considers "high" loop current is pretty conservative.
Mitel SX-100 complete system.
Hello Everyone, this is in no way an attempt to sell anything, but I have recently purchased a motel that included a complete Mitel SX-100 system set up for 24 rooms. The system was only used for 1 year although it was originally purchased 11 years ago. I intend to convert the motel into apartments and I'm curious what the system would be worth. Any honest opinions would be greatly appreciated... Thanks for your time and sorry to get on a different subject......
Hello Everyone, this is in no way an attempt to sell anything, but I have recently purchased a motel that included a complete Mitel SX-100 system set up for 24 rooms. The system was only used for 1 year although it was originally purchased 11 years ago. I intend to convert the motel into apartments and I'm curious what the system would be worth. Any honest opinions would be greatly appreciated... Thanks for your time and sorry to get on a different subject......
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