Cannot Dial out? Partner ACS r7. 18d

[Symmetry]

Hi all,

Recently started having a wierd problem on two of our extensions here. When the handset is picked up, a dial tone is heard, but as soon as a outside number is dialed, the phone acts like it is paging another handset. It makes some error noise.

I have tried dialing 9 and other numbers first with no luck. Same response. All the other phones are fine.

I believe our phone model is 18D and the phone system is PACS R7.0 91I.

I've been searching for days to find a solution with no luck. Please advise.

Thanks.

[Symmetry]

Just wanted to help anyone with the same issue as me.

Please see this post.
http://www.aucommunity.com/showpost....13&postcount=2