Hi,I'm using an AS5300 with an E1/PRI Card with Serial Interfaces (Figure 2-4 : http://www.cisco.com/en/US/products/hw/univgate/ps501/products_installation_guide_chapter09186a008007de67.html#8697) and a Cisco 1721 with a VWIC-2MFT-G703 (http://www.ci...