118 TSU 600 User Manual 61200.076L2-1IndexDS0 map20, 33, 41, 49, 64, 65, 66, 81, 88,92, 95, 96, 97configuration example 85, 92switch (Auto/Manual) 62DTEconfiguration example 85Nx56/64 Configuration 69Eexample operations 85exit menu operation 45Ffactory default 33, 36, 50factory restore 72far end loop back test 79, 100fractional T1 2front panel6, 9, 17, 18, 19, 33, 35, 36, 39, 82displays 40keypad operation 39layout 40front view of TSU 600 3functional description 3, 4Ggrounding instructions 28Iinitialization 38self test 33set control port 36set unit identification number35set user passcode 34interfaces, TSU 100 7internal timing 13, 15introduction 1Lloopback 78network 78overview 17T-Watch 17loopback testsDTE interfaceDTE 18port 19Mmenuopening menus diagram 47menu operation 73Nnetwork 7network (NI)configuration 58example configuration 86, 90NI errors 48performance data 53performance data clear 54wiring 30network interface 7network testsexample 100local loopback 78pattern results 80remote loopback 79NI errors 48, 54Nx56/64 configuration 69Ooperation 71, 72, 73, 74, 75operation keysA, B, C, D, E, F 42alarm 42cancel 42