[Asterisk-Users] Extra digit needed for outbound call

[Lisa Xie]

Hi,

I've been working on starting a lab of end to end asterisk system and
now most of pieces seem to be working. The two asterisk servers are
connected by T1. Both servers have a couple of SIP phones connected and
one of the servers has a FXS card with an analog phone hanging. 

I can make calls across the T1 link however there is one thing that I
don't understand. I need to append one extra digit to get the correct
extension number at the other end. For example, when I tried to call
extension 2000 at the other end, I need to dial "92000x", where x can be
anything between 0-9. Otherwise, if I dial "92000", the console says
something like "extension 200 is not found". 

Also internal calls are normal. 

This looks very bizarre for me... How can I fix it?

Lisa