Nortel Networks 1000 - Manual (Page 764)

764 NTAK09 1.5 Mb DTI/PRI card
Self-tests of the NTAK93 daughterboard are invoked manually by
commands in LD 96.
The NTAK93 DCHI daughterboard LED is the bottom LED on the faceplate
of the NTAK09 DTI/PRI card.
The NTAK93 DCHI daughterboard does not perform a self-test when
power is 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 turns green and remains steadily lit.
Self-tests of the NTAK93 daughterboard are invoked manually by
commands in LD 96.
DTI/PRI local self-test
The local self-test, also called a local loopback test, checks speech path
continuity, zero code suppression, remote alarm detection, and A & B bit
signalling. This test is performed manually on a per-loop or per-channel
basis. The local loopback test performs a local logical loopback and does
not require any external loopback of the T1 signal.
The local self-test, also called a local loopback test, checks speech path
continuity, zero code suppression, remote alarm detection, and A & B bit
signalling. This test is performed manually on a per-loop or per-channel
basis. The local loopback test performs a local logical loopback and does
not require any external loopback of the T-1 signal.
Restrictions and limitations
The DCHI and DTI/PRI must be disabled before performing the self-test
on the entire DTI/PRI card. Individual channels must be disabled before
performing a self test on a particular channel.
The DCHI and DTI/PRI must be disabled before performing the self-test
on the entire DTI/PRI card. Individual channels must be disabled before
performing a self test on a particular channel.
Power requirements
The DTI/PRI obtains its power from the backplane, and draws less than 2
amps 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 2
amps 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 2
amps on +5 V, 50 mA on +12 V and 50 mA on -12 V.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.