hi friends 1) I am looking for good books on VOIP and VPN technologies. any suggestions please? 2) I connected my branch office to head office through ISDN bri (2B+ 1D). I used 2600 router with 1 port ISDN BRI card at head office. my branch office dial to head office through one of the bri channel. will my head office router with this single ISDN port , can accept second data call from other remote location? i.e. can i make 2 different ISDN dial-ups to head office through single isdn port from 2 different locations? please confirm me. tanx in advance. bye ____________________________________________________________________ Get free email and a permanent address at http://www.netaddress.com/?N=1 _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]