I have a Livinston Portmaster router with an Adtran 120 unit in a remote branch office. I also have a Livingston Portmaster with a Kentrox DATASMART ADD / DROP unit in the main office. The Point-to-Point T1 is split between voice and data I am in the process of ordering a Cisco 2620 with a VWIC-2MFT-T1-DI card to replace the livingston and Kentrox unit in the main office. Has anyone successfully been able to split voice and data on P2P T1 between an Adtran 120 unit and one the Cisco mutiplexer add / drop units (VWIC-2MFT-T1-DI) ....or does anyone think there will be problem splitting voice and data on the T1 between the Adtran 120 and the Cisco multiplexer units Thanks In Advance