We may have a requirement to have 2 additional tagged VLANs pass through the phone to another device. Will a Cisco IP phone (7941G) pass through traffic which is tagged with a VLAN that is not the voice VLAN?
eg. Voice VLAN is 7, device connected to phone needs VLANs 10 and 20 and possibly the untagged VLAN. If I configure the switch port as a trunk and allow those 3 VLANs on the trunk, will the device connected to the phone get the traffic in VLANs 10 and 20?