PairGain PG-Flex, Manual

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Installing PG-Flex System Hardware
52
Install the Channel Units
The following procedures are the same for POTS, LS/GS, and ISDN channel units. Refer to Table 4
on page 21 through Table 8 on page 24 for line unit and system compatibility.
Install channel unit and verify operation as follows (see Figure 24 “Card Locations for a 19" COT
Shelf” or Figure 25 “Card Locations for a 23" COT Shelf”):
1 Insert the channel unit into the COT shelf and verify that all LEDs:
• turn on for about two seconds,
• then scan from top to bottom,
• then turn Off.
If the LEDs do not follow the above sequence, refer to the troubleshooting section.
2
Provision the channel unit as described in the provisioning section
3
Place a cross-connect (jumper) from the CO to the appropriate COT shelf termination for the
circuit(s) selected.
An FPI-729 List 1 PGTC Interface Unit or an FAU-728 List 2 Alarm Unit must be installed at all
times when ISDN channel units are installed. These units provide the composite clock reference
source for the ISDN channel units and is required for normal operation of the ISDN channel
units. Removing the FPI-729 List 1 or FAU-728 List 2 during an ISDN will terminate the call.
Observe normal electrostatic discharge precautions when handling electronic equipment. Do not
hold electronic plugs by their edge. Do not touch components or circuitry.