I have a WAN that consists of two LANS. On that network there are two Toshiba phone switches. I wouldn't say that it is a VoIP system as the individual terminals are digital. For some reason we sporadically experience some choppiness in the calls from node to node; the choppiness is not quite a delay or an echo -- it seems more like a broken call.
I have verified the priority of voice on the routers as well as the timing. But the problem still occurs and it is frustrating when it occurs on conference calls. Is there anything else that we may be missing that could be improved on this situation?
I would check to be sure that your cabling tests to the proper category. Also, it may not hurt to put a network management package on the network to determine the overall health. You want to be sure that your network connections for the switch are not half-duplex or have not auto-negotiated down to half-duplex.
I am assuming that since you have digital phones that there is some conversion to VoIP. It is possible that the switches are bottlenecked. They may benefit from a memory boost or an upgrade. Make sure that you have the latest upgrades installed as well.
Also you didn't say what type of WAN circuit that you have, if the choppiness is in a single building or if it happens when you are going from one site to another. Are they all in one building? This will certainly matter in helping diagnose the problem. Please let me know and I am happy to help further.
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