I did that a couple weeks ago. The Washington Hot Line was unaware of the WEBEX in CA. The last I heard of was that VA mandated use of VVC. Washington promised me that the web people at VA were working on getting captions on VVC and should have it up and running in a couple months. They weren't interested in using a "work-around" by using ASR over a third party call-in number (which they can already do). Not surprising to get more than one answer from one VA. Sort of like "if dad says no ask mom".