3cx with Commend intercom

Hello All. I'm working on getting some SIP based intercoms working with an older 3cx version. My main issue (I think) is that 3cx doesn't have a phone/intercom model listed for my particular phones. I've had luck in the past with using a similar model selection in the 3cx configuration menu even though my exact model wasn't listed, something close ended up working just fine.

Any ideas for a generic phone model that might work when selected from the Phone Provisioning menu?