atcomsystems.ca/forum Forums TDM Business Telephone Systems Nortel Telephones & Systems AA transfer to extension

A customer complaints to me that he hear the prompt of callpilot "invalid extension number" and AA can't transfer call,when he initiate a call using cell phone from outside to company.
Above case heppens once in a while.
Who can tell me how to solve it,or it is a bug of callpilot essentially.

It isn't really a bug, its the cellular technology. All systems that rely on quality DTMF being received can be affected. The symptom that I have seen most is a single press of a digit (on a cell phone), that is recieved by the system as two (or more) presses.


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Some cell phones have a feature in their setup menu where you can select "long tones." This will enable the user to send a proper DTMF tone for as long as he holds the button down.

thank for all of you!
i understand the cause of this problem is cell phone or wireless network of cell.

You don’t mention the model or version of your software, but if it is a call-pilot, there actually is a patch that helps this problem. Any CP under version 3.0 is susceptible to the DTMF errors. It is made worse by cell phones. A sure sign that the patch would help is if 221 goes to 222 or vice versa. If you don’t have a 222, this could explain the "invalid ext. message" The only way to know if the patch would help is to check a certain version number inside the CP. Access is restricted to Authorized Nortel vendors.

the callpilot's release is 2.1. i know the patch of CallPilot which is DSP firmware A7,and i finished patching the CallPilot.
before patching,all calls happen this problem,including general phone and cell phone.

[This message has been edited by parker.xu (edited August 19, 2005).]