First of all, make sure you have a *daily* programmed reboot or activity switch, depending on whether or not you have control redundancy. These switches need to have this done regularly, no fault of Mitel's, just the way things are. I've been there, done that, when I was just a Mitel Noob, my vendor's tech ("The Sexual Intellectual" - f***ing know-it-all, that is) neglected to program a daily reboot - drove me insane for three months with all sorts issues.
If you have a technician's handbook, run the healthy system checklist. If you don't have it, you can download a PDF from
It won't hurt to reset your LS/GS card, that can work minor miracles, especially if the switch or Per cabinet is not sited ideally (dirty environment, vibration, etc.).
Also it's most likely that you have ground start trunks, not loop start, as is the case in nearly every PBX. If there is a differential between system ground and telco ground the possibility that mayhem may ensue. Consult your vendor (Beware though: grounding is an issue among phone men that has launched a thousand fist fights and flame wars).
It's also not out of the realm of possibility that your LS trunks are out of spec. for current or induced AC. I suggest you look at the loop current and longitudinal imbalance bulletins on
The methods for measuring this are outlined in the bulletin.
Hope this helps
jsaxe
"When the going gets weird, the weird turn pro."
Hunter S. Thompson (R.I.P. Doc)
