I have a customer with an XTS-600 system who is experiencing failures of 12-port analog station cards, but ONLY in cabinet #2 (the third one). When these cards go bad, there is nothing on the ports, no dial tone, no battery, nothing. These ports can be called, but there's no talk path or ringing battery present on them. The system still allows the ports to be programmed as valid resources. Lately, I've just been using those dead ports for virtual extensions, etc.

The only thing that these cards have in common is that they've been pulled and replaced on a live system. The system is in a hospital, so powering it down for a card replacement isn't much of an option. The ones that failed (slots 2-0 and 2-3) were replaced with known good cards, but the same result occurred immediately. New card, all ports dead.

I know that the XTS system's predecessors and sister systems, such as the DVXplus II, III and XTSc have labeling indicating that NO cards can be changed without powering down the system. The XTS does not have these warnings. It was my understanding that the XTS systems DO allow for hot-swapping of cards. I remember in some other Vodavi systems, the documentation warned about issues with the ring generator connection or replacement on a live system. I don't see these warnings in the XTS documentation though.

I have a feeling that these cards are failing only because we're changing them on a live system. Other cards, such as PRIB, DTIB, etc. seem to work fine upon replacement. I'm a bit leery about replacing another failed SLIB-E card without confirming this concern. My next step is to replace the cabinet itself, but that's a chore that I really don't want to do on a live system since about 84 stations will be out of service during such.

Can anyone confirm the ability to hot-swap these cards? Better yet, can anyone offer any suggestions for my dilemma?

Ed Vaughn, MBSWWYPBX