866 NTAK09 1.5 Mb DTI/PRI cardSelf-tests of the NTAK93 daughterboard are invoked manually by commandsin LD 96.The NTAK93 DCHI daughterboard LED is the bottom LED on the faceplateof the NTAK09 DTI/PRI card.The NTAK93 DCHI daughterboard does not perform a self-test when poweris applied to it. When power is applied, it turns red and remain steadily lit,indicating the DCH is disabled. When the DCH is enabled, the LED turnsgreen and remains steadily lit.Self-tests of the NTAK93 daughterboard are invoked manually by commandsin LD 96.DTI/PRI local self-testThe local self-test, also called a local loopback test, checks speech pathcontinuity, zero code suppression, remote alarm detection, and A & B bitsignalling. This test is performed manually on a per-loop or per-channelbasis. The local loopback test performs a local logical loopback and doesnot require any external loopback of the T1 signal.The local self-test, also called a local loopback test, checks speech pathcontinuity, zero code suppression, remote alarm detection, and A & B bitsignalling. This test is performed manually on a per-loop or per-channelbasis. The local loopback test performs a local logical loopback and doesnot require any external loopback of the T-1 signal.Restrictions and limitationsThe DCHI and DTI/PRI must be disabled before performing the self-teston the entire DTI/PRI card. Individual channels must be disabled beforeperforming a self test on a particular channel.The DCHI and DTI/PRI must be disabled before performing the self-teston the entire DTI/PRI card. Individual channels must be disabled beforeperforming a self test on a particular channel.Power requirementsThe DTI/PRI obtains its power from the backplane, and draws less than 2amps on +5 V, 50 mA on +12 V and 50 mA on –12 V.The DTI/PRI obtains its power from the backplane, and draws less than 2amps on +5 V, 50 mA on +12 V and 50 mA on –12 V.The DTI/PRI obtains its power from the backplane, and draws less than 2amps on +5 V, 50 mA on +12 V and 50 mA on -12 V.Nortel Communication Server 1000Circuit Card ReferenceNN43001-311 01.04 StandardRelease 5.0 23 May 2008Copyright © 2003-2008, Nortel Networks.
