Hello All, I've managed with help of Elastix 1.6 to make complete IP Network consisting of 4 PBX Panasonic TDA/TDE and Avaya Definity. Working very stable. TDA are connected via H.323, TDE via SIP, and Avaya via E1 (see attached scheme). Still of course some inprovements are needed and some bugs to be fixed. I will come back with more detailed info on problems. Cheres from Russia, Moscow. BR, P.S. If someone needs help in related integration schemes - welcome.