sundance-communications.com/forum Forums TDM Business Telephone Systems Comdial Telephones & Systems FXISTM-C16 Again

Well the weekend was quite eventful. Northeast TN saw some more of the wonderful spring thunderstorms and the saga continues, we lost 19 IST cards at the same location, three of which were the trial cards from Comdial. We have been told that the last trial cards that got hit only had one port that was bad on the card however there is some sort of protection on the card that shuts down all ports on the card no matter how many ports get hit. This same site has multiple digital cards on the system and nothing has been affected by the storms other than the IST cards. This has become a very frustrating situation with our customer and us and are praying that Comdial will step up to the plate and fix the problem. A customer can understand losing 1 or 2 ports per card due to storms etc. but when those 1 or 2 become 16 per card it is devastating.

You must have one heck of a stock. What do you do when this happens? Does the customer have to pay or does Comdial cover this?

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Just double checked your profile. Even Black Box can't do this forever.

[This message has been edited by MARK3906 (edited April 11, 2005).]

We have bitten the bullet on a few of the cards but I must admit Comdial has provided many of the cards to use as replacements, however it does little to induce confidence in the equipment for our customer. They have many places that we could install this equipment if we could get the IST problem resolved.

What type of environment is this install? I had 2 sites that were both sitting on a slab of limestone. I have made several changes to account for ground potential issues at these sites.

I have to ask if any of these SLT ports are leaving the building?

If they are then you must have Primary protection (Gas tubes protectors) and secondary (Solid state/Delta) protection on any of these ports leaving the building.

Also all Underground and arial cables are sheathed and bonded to a good ground.

As far as the Digital ports not getting effected the digital ports and the phones are phantom powered through transformers on the Station boards and also in the phones themselves. These transformers act as a direct short (Low impedence windings) to surges.

We have 3 different locations that have IST ports and Digital ports that have several buildings spread out across the properties and when we first installed the got hit pretty bad.

The first thing we did was make sure that the underground and arial cables were protected and the sheaths were only grounded at one end.

Of course if it was a direct hit, nothing will help that.

DJ

Pulled one out of stock that had been sent for repair and returned to the shelf when it came back. They sent me a FXCMW-C16 that was labled wrong as an FXISTM-C16.

I found hits coming in the back side of IST ports via the cordless phones, faxes, and modems power supplies.