Hello, We are using Asterisk-1.0.3 version. Grandstream works fine with this version. When trying to use a Sipura 2000 we the 488 error and also Answering with non-codec capability 0x1 (telephone-event) message. also in the sip show peer for Sipura Codecs : 0x0 (nothing) Codec Order : (none) Status : UNKNOWN sip looks as below: [general] port = 5060 ; Port to bind to bindaddr = 0.0.0.0 ; Address to bind SIP channel to context = invalid ; Default context for incoming calls disallow=all allow=ilbc allow=ulaw ;allow=gsm ;allow=g729 canreinvite=no nat=yes insecure=very cache_mysql_entries=yes maxexpirey=15 defaultexpirey=15 dtmfmode=rfc2833 any help appreciated Thank you,