ADTRAN TSU 600 User Manual

Also see for TSU 600: User manual Product specifications

Contents

Chapter 3. Operation61200.076L2-1 TSU 600 User Manual 7 9REMOTE LOOPBCKThis activates the same loopbacks as Local Loopbackbut at the far end. It uses either the inband loop-upcode as specified by ANSI T1.403 for line loopback(ATT In-Band LLB), or the FDL as specified in ANSIT1.403 for payload and line loopback codes. Thefollowing options are available:ATT In-Band LLB Activates the line loopbackusing inband codeANSI FDL PLB Initiates the transmission ofan FDL payload loop-up codetoward the far endANSI FDL LLB Initiates the transmission ofan FDL line loop-up codetoward the far endNo Loopback Deactivates the loopbackRemote Loopback cannot be used with Fractional T1 sincethe full T1 stream including the FDL is not transported tothe far end.After a Remote Loopback option is selected, theTSU 600 verifies that the far end is actually in aloopback by checking for the receipt of a code loopedback from the far end. Once the Remote Loopbacktype is selected, the LCD displays the loopbackprogress by displaying Looping until loopback isverified.