[Serusers] 30 seconds call with some uac

hi all,ter around we use ser with many differents handests, ata and softphones. with some of them (sipura and Zyxel) the call finished after around 20/30 seconds. The terminator send us a 200 OK when communication start, but with these UAc, ser doesn't send back an ACK to the termination. Any idea of how to solve that problem? Thanks, Olivier Olivier Taylor Geomatics 19 avenue du vivier d'oie 1000 Bruxelles olivier.taylor(a)geomatics.be tel: mobile: +32 2 320 06 16 +32 495 28 33 61 <https://www.plaxo.com/add_me?u=21475503789&v0=1311510&k0=2123456319&v1=1311 511&k1=2037529684> Add me to your address book... <http://www.plaxo.com/signature> Want a signature like this?