Agilent / Hewlett Packard J2300D / Z4425A WAN / LAN-Tester The J2300D Advisor WAN combines complete protocol analysis for WAN and ATM testing with a powerful and rugged personal computer -- all in a lightweight, easy-to-carry package that offers the best combination of price and performance in the industry. In addition, this platform can easily grow to perform LAN and Voice Quality Analysis. The unit allows you to monitor all major WAN communication protocols from 50 bps to 52 Mbps: Frame Relay, ISDN, X.25, HDLC, SDLC, SNA, Sync/Async PPP, ATM-DXI and encapsulated LAN protocols running over the wide area network. V-Series interfaces, such as RS-232C/V.24, RS-449/422/423, V.10/V.11 and V.35, are already built into the platform. Slide-in modules add test capability for ISDN BRI and PRI, T1, E1, E3, and STM-1/OC-3c. Undercradles also add test capability for Ethernet, switched Ethernet, Fast Ethernet, Gigabit Ethernet, FDDI, Token-Ring and STM-4c/OC-12c (622 Mbps ATM). In addition, the Advisor can be expanded for voice Quality Test through analog FXO and E&M interfaces.