The U-1496E has only LED indicators. The TST LED will be ON during power-on self-test, and OFF after the test if the test is OK. The SQ LED will flash if the test fails. The number of flashes indicates the error number corresponding to the above error message. Analog Loopback Test, Local Digital Loopback Test, Remote Digital Loopback Test, Analog Loopback Test with Self-Test, and Remote Digital Loopback Test with Self-Test can all be selected from the terminal or LCD front panel under the `DIAGNOSTIC' menu. , View and Download ZyXEL Communications U-1496 series user manual online. U-1496 series universal modems. U-1496 series modem pdf manual download. Also for: U-1496e, U-1496b, U-1496r, U-1496p, U-1496e+, U-1496r+, U-1496b+., ZyXEL Communications U-1496 series User`s manual. Topics manualzz, manuals, U-1496 series, ZyXEL Communications, User manual, Collection manuals_zyxel; manuals; additional_collections Item Size 54.7M . Addeddate 2021-01-23 03:29:40 Identifier manualzz-id-1125435 Identifier-ark ark:/13960/t9775hz8c .