atcomsystems.ca/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems Transtalk 9040

You can try to press reset button on Radio module that represent that port and then try to reregister. The only problems I had with registration if somebody disconnect cordless Ext. and then try to connected back without Unregister and then Reregister again. But I never was successfull withot reseting Radio Module first.