614 / Problems with trunk cartridges serviceModular ICS 7.1 Installer Guide N0130943 02If through-fed repeaters are used on the T1 span, disablethe internal CSU and connect the DTI to an external CSU.6. If the problem persists, replace the DTI.Monitoring the T1 or PRI signalIf you are finding minimal faults with the T1 or PRI signal,you can monitor the signal to try and isolate the problem. Themonitor jack on the DTI faceplate provides non-intrusive,bridged in-service monitoring of the T1 or PRI signal. Connecta protocol analyzer or other test equipment into the monitorjack to monitor the signal received from the network, and thesignal transmitted by Norstar.Notify service provider of T1 or PRI signalingdisruption.Notify your T1 or PRI service provider beforedisconnecting your T1 or PRI lines, removing power toyour system, or performing any other action thatdisrupts your T1 or PRI signaling. Failure to notify yourT1 or PRI service provider may result in a loss of T1 orPRI service.Receive signalTransmit signal
