I've got an office with 6731i's and 6735i's and upon switching to a new SIP server, the handsets are displaying "VIA: xxxxxxxxxxx" after briefly displaying CID data. The VIA number display is unnecessary in our case; the calls always come from the same number. The phone operators here would rather have more time to read the CID, which only flashes momentarily and often disappears too quickly to read.
I'm aware this is a configurable setting, because we never saw "VIA" with our old SIP server. The problem is that I don't know which configuration parameter adds or removes VIA. I read through the manual, and I'm not seeing anything configuration parameter that seems relevant.
What changes to the handset's configuration will remove the VIA display?
