Jonny - welcome to the forum, I'm also in the UK.
This config was designed for a UK guy using sipgate.co.uk on sp1:
http://www.obitalk.com/forum/index.php?topic=5362.msg34774#msg34774If you are using another voip provider, then you will want to delete or change the two rules starting with "1" for Sipgate service number and Sipgate internal numbers. This config also assumes that you wish 999/112 to go out to PSTN on the Line Port. Anyhow, it explains the changes and adds STD codes etc, so it's a place to start.
Has anyone noticed caller id from an obi110 coming up on a end terminal as the callers number but appearing twice?
Sometimes if no CName (CallerName) is provided, then CallerID will show up as CName and CallerID.
Final question, sorry it's a little off-topic. If an obi110 is on a call (incoming or outgoing) on SP1 if simultaneous sessions are set to 1 will the obi110 reject a second incoming call as "busy"?
Yes, that should be the case. If you do this, then you will restrict the ability to use 3-way calling etc.