Hi Dae, In zaptel.conf change ccs for cas and comment dchan line, for example: span=1,1,0,cas,hdb3 cas=1-15:1101 #dchan=16 cas=17-31:1101 -- Humberto Figuera - Using Linux 2.6.22 Usuario GNU/Linux 369709 Caracas - Venezuela GPG Key Fingerprint = 5AAC DF0C 00F4 2834 28BA 37AD 3364 01D1 74CA 0603