hi techs i got a small problem at my client place i have isdn connection between my client's head office and factory through 2610 routers (through isdn bri card). configuration is through. every thing working fine. i draw a separate cable from NT1 second port and connected to head office router aux port through TA (terminal adapater). aux port configuration is through. I am able to dial from my office win-NT RAS srever (through PSTN line) to client head office 2610 router through aux port. connection is through working fine. then, i configured my client head office 2610 router aux port for call back to my NT server. but it is not working. when i dial from my nt server to aux port of 2610 router, connection is through, router is responding and terminating the call to call back. then it is giving error message like no interface available to call back. timed out. any suggestions pls. bye ravee ____________________________________________________________________ Get free email and a permanent address at http://www.netaddress.com/?N=1 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=746&t=746 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]