Nortel Networks NN43001-301 - Manual (Page 35)

NT5D97 Dual-port DTI2/PRI2 card 35
Two control signals are used to communicate the D-channel link status
to the DCH or MSDL. These are:
• Receiver Ready (RR), originating at the DDP2 card, to indicate to the
DCH or MSDL that the D-channel link is operational.
• Transmitter Ready (TR), originating at the DCH or MSDL, to indicate to
the DDP2 card that the DCH are ready to use the D-channel link.
Table 6 "DCH/MSDL Receiver Ready control signals" (page 35) indicates
how the RR control signal operates with regard to the DDP2 status.
Table 6
DCH/MSDL Receiver Ready control signals
RR State Condition
ON D-Channel data rate selected at 64 Kbps
and
PRI2 loop is enabled
and
PRI2 link is not in OOS or Local Alarm mode state
and
PRI2 link is not transmitting a Remote Alarm pattern
and
PRI2 link is not receiving a Remote Alarm Indication from
a remote facility
OFF All other conditions
NT5D97 faceplate
Figure 8 "NT5D97 faceplate" (page 36) illustrates the faceplate layout for
the NT5D97 DDP card. The faceplate contains an enable/disable switch;
a DDCH status LED; 6 x 2 trunk port status LEDs; and six external
connectors.
Table 7 "External connectors and LEDs" (page 36) shows the
name of each connector, its designation with respect to the faceplate and
the name and description of the card it is connected to. Also shown are the
names of the LEDs.
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
Copyright © 2003-2007, Nortel Networks
.