It seems rather embarrasing to ask for advice or direction on this but I’ve come across an issue where one of our user’s extension is unable to dial out and call certain vendors and is even unable to dial their own cellphone.
Is there anywhere specifically in PBX or perhaps in Asterisk where this is managed at? I figure there must have been some sort of configuration change at some point but comparing the sip settings for that extension and device yields nothing in particular when compared to another.
Now that you mention dial plans I did think to take that into account. Normally I’ve only every seen that happen with our Cisco phones as we are, slowly but surely, transitioning from the polycom phones to the ciscos. I have had issues with dialplans but had not heard of them causing problems dialing external numbers before but I’ll give this a look the second I can.