Yeah...The dispatcher can turn it on and off at will....There's been some "interference" through the link off and on....They turn it off when it gets to be too much.
As for the talkgroup changing.....I don't think that happened....I'm still picking them up on the same one.....However when the VHF patch is up and going, the LPE's can't seem to scan the westside talkgroup for some reason. I hear this is a known problem. So if you have a LPE and want to scan the system, you will have to keep your radio on the westside talkgroup as the priority.
Oh, and the 155.850 patch up at the moment..... works well for me, since I'm up here in Sandoval County, and everything is still VHF....I keep a VHF radio with me and added 155.85 into my scan lists. I spend "MOST" of my time over on the westside anyways, so it's easier this way then carrying 2 radios.
-RC-