PDF user manual for CopperEdge 150

The IDSL Module includes a CPE monitor that detects the presenceor absence of a CPE through the EOC, and a standardIDSN network element counter. The monitor sends both standardEOC messages and a Copper Mountain specific messagethat the CPE use to learn the configured data rate. If for somereason the EOC path fails, the CPE may still be able to determinethe data rate based on receiving Copper Mountain CMCPpackets. The monitor state machine is called once a second.CustomerPremisesLoopDigital Loop CarrierCOCopperEdgeDSLAM(Remote)IDSL CPE(NT)Hop 0RepeaterHop 5Remote DTELine Unit(LT)Hop 4CO Term.Line Unit(NT)Hop 3D-BankLine Unit(LT)Hop 2D-BankLine Unit(NT)Hop 1IDSLMod.(LT)TestApp.SystemControlModuleIDSL Loop with Multiple Network ElementsIf the entire IDSL loop is intact, EOC will detect and report thepresence of the CPE at the downstream end of the loop. If thelink is not complete, EOC will attempt to count the network elementsthat are in place and functioning, and report the numberthrough the cmIdslModem NetworkElements object. Thus,if you know how many hops are supposed to comprise a link,then isolating the area of the malfunction becomes much lesscomplicated.Similarly, if the CPE at the end of an IDSL link is able to train,but other performance factors are degraded or marginal, theSCM-DSLModuleEOC test lets you command any of the precedingnetwork elements into loopback mode. By looping backfrom successive hops, you should be able to isolate the link segmentwhere the problem is occurring. For details on configuringa CE150 for EOC loopback testing, see the cmLoop MIB descriptionin the CopperEdge 150 CopperCraft Reference andMIB Definitions manual.&RSSHU(GJH,QVWDOODWLRQDQG2SHUDWLQJ*XLGH