The HP E5125A E1 2.048 Mb/s Interface Pod generates and analyzes 2.048 Mb/s PDH frames using the HP E5200A Broadband Service Analyzer. These frames contain ATM cells that are generated and analyzed by the measurement system. This interface pod provides test capability at the physical layer. It supports the basic frame and the CRC-4 multiframe structures at 2.048 Mb/s as specified in ITU-T G.703 ITU-T G.704 ITU-T G.706 ITU-T G.775 ITU-T G.804 ITU-T G.823 ITU-T I.431 ATM Forum E1 Physical Layer Interface Specification