IAX2 Channel: Unable to write frame

I’m getting a stream of these messages on my Asterisk:
[Jun 19 19:02:57] WARNING[24625]: app_meetme.c:3667 conf_run: Unable to write frame to channel IAX2/NYOFF2NY-14799

It relates to a IAX2 channel which is active on one server and not the other end.

Is there a way I can kill an IAX channel? I can stop the stream of message by starting and stopping the server but I would prefer to just bring down this channel or peer and rather than Asterisk, is that possible?