How many nodes do you have on network? Around 60? Regardless, you shouldn't have LAN issues, but you never know. First, which calls are dropped? Calls out the gateway or IP Phone to IP Phone calls? Obviously, check the stats on the switches and see if there are any errors anywhere, if so, clear the counters and see if you can make a correlation next time there is bad quality. Typically, if there is a traffic problem, you will see bad quality, but the call won't drop (at least not at first).
If it is the calls out the gateway that are giving you issues, let us know and we can start troubleshooting that. Keep us informed.
You mention that the 7910 is running at half-duplex. We use the 7910s with a 10/100 port and they all run at full duplex. I assume you are using the single port version, even so I would expect this to be a full duplex port. I can't see anything on CCO to state otherwise. This may well be your problem because voice does not run well across half-duplex.
Let me get this straight you are using an ISDN BRI 2B and 1D channel and you are using G711 CODEC with 60 phones. With overhead on the packets is that not 80k per conversation going across 128k circuit. So after the first call it will hog the BW. Also is it off net calls that suck or both on and off net calls.
That's not quite correct. The guy is using a BRI -Voice card, therefore the gateway is a normal voice gateway with only 2 circuits. the 3640 does the normal IP-Circuit switched conversion as with any other gateway.
However I agree there isn't enough info on what the problem really is. When does the problem occur, are the phones using the internal switch and if so are they plugged into the HP switch.
Come on people give us something to work with here!!!!!!!
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