... -E1 Data Link Protocol: MLPPP, FRF.16 CISCO HWIC-4T1-E1the Cisco Clear Channel T1/E1 High-Speed WAN ... /E1 High-Speed WAN Interface Card (HWIC) integrates four T1/E1 ports in a singlewide HWIC to facilitate n x T1/E1 ... offices.With the Cisco 4-Port Clear Channel T1/E1 HWIC with integrated channel service unit and data service unit (CSU ... , JATE, CS-03, FCC CFR47 Part 15, EN300-386 CISCO HWIC-4T1-E1