I went back to thrusdays CVS when I call a zaptel interface from the sip the sound on the ZAP side is very choppy (what is being said by the BT-101 user) However what is said on the zap side (and heard by the BT user) is nice and clear. The BT phone is on a LAN with the asterisk box so there is no bandwidth issues. Any Ideas why I am having an issue? Michael