Just an addition: t38modem only supports OPAL 3.10.x. OPAL 3.14.x has a diffent API which is incompatible with t38modem. http://sourceforge.net/p/opalvoip/mailman/message/32955378/ -- Lorenzo Milesi - lorenzo.milesi at yetopen.it YetOpen S.r.l. - http://www.yetopen.it/