! SRST for SIP phones Configuration ! voice service voip sip registrar server expires max 600 min 60 ! voice register global system message ERROR 911 ONLY max-pool 125 max-dn 200 timezone 13 ! voice register pool 1 busy-trigger-per-button 3 id network XXSubnetXX mask XXMaskXX !< network of phones > preference 1 dtmf-relay rtp-nte codec g711ulaw no vad ! !