Choppy inbound calls

[TWNphoneguy]

We have a Nortel Opt 61c / CS1000 / M2616 ph sets, and started experiencing intermittent choppy/clipped inbound calls a couple of days ago. I thought the problem was on our inbound PRI's but after having the carrier check the circuits, they are saying everything is fine on their side of the PRIs, no errors, loss of frame, timing issue etc. We then had our PBX maint. provider check things from our PBX side and they are saying everything is fine on our side as well. We also have a separate outbound only LD T1 that we route LD traffic on and calls on that circuit are fine. We have tested routing calls on individual PRIs to see if the issue was isolated to a single one, but it is happening on all of them.

Anyone ever experience this or have any ideas what might be causing this? The chopping/clipping is only heard on our side of the call and does not happen on every call.

Any assistance would be greatly appreciated.

Thanks.

 

[tbonz25]

Is the system using FIJI (i.e. fiber connections to the groups) or the old IGS? Normally call clipping on a circuit would have something to do with timing so definitely look at the clocking to make sure you are not having issues there.