Hello, I'm using FreeSWITCH in a very custom system and I need to setup this kind of registration: There are two SIP phones A and B: when each SIP phone have its own unique ID the registration to freeswitch goes as usual and no change is needed, but when A and B share the same ID I would like to reject the registration for the last SIP phone. So, if A and B have the same ID and A is registered first, I would like to reject the subsequent registration of B. I tried to change the values of some configuration parameters such as "sip-allow-multiple-registrations" and "max-registrations-per-extension" but it didn't work (by the way I'm not shure to have edited properly this parameters). How can I achive this kind of registration? Thank you Alberto -- Dr. Villa Alberto Sw Engineer SeleTech srl via Collodi, 8 20052 Monza (MI) tel: +39 039 5962000 fax: +39 039 9716905 email: a.villa@seletech.com web: www.seletech.com www.seletech.eu