call in to AA for external analog line

[steger424]

I have a client that calls into his AA after hours and chooses a bogus phone extension xxx and that is set to call forward to an analog line port so he can call a cleint from the office line. The call goes through just fine but it seems line in never releases becuase when the other parts hangs up the call tuns into another dial tone ready to make another call. Anyone got any ideas or a better way to call into the office remotely and use the company's phone number for calling clients rather than a cell phone . 

Thanks

[steger424]

Do you think it could be a TELCO issue. I have researched and cannot find anything on 3com NBX