Premigration administration
Issue 2.1 June 2006 717
- High- or critical-reliability: Divide the total number of PNs by 5 (if the result is not an
integer, round up). For each IPSI-connected PN, you need two IPSIs.
● On large configurations that contain multiple switch node carriers, you must place the
IPSIs as evenly as possible among the switch nodes. Use the list fiber all
command to determine which port networks are connected to which switch node.
Duplex reliability configuration
To set up a duplex configuration:
!
WARNING:
WARNING: The following procedure affects service when the circuit packs are being
switched out. Coordinate this activity with the customer to minimize disruption of
customer activities.
Note:
Note: You can replace the maintenance circuit pack with the TN775D Maintenance
(EPN) (if necessary) and the TN2182 Tone Clock circuit packs with the
TN2312BP Internet Protocol Server Interface (IPSI) circuit packs and program
them ahead of time. All the circuit packs being replaced are hot-swappable.
Hot-swappable means you do not need to turn off the PNs or the carrier.
1. Type status system all and press Enter to determine:
● Which PNs have TN2182 Tone Clock circuit packs
● Which cabinets they are in
● Which is active
● Which is standby
2. In cabinets receiving an IPSI circuit pack, remove the TN2182 Tone Clock circuit pack from
the expansion control carrier. Place the circuit pack in an antistatic carrier.
Note:
Note: If present, do not remove the TN771 Maintenance/Test circuit pack.
3. Remove the TN775B/C Maintenance (EPN) circuit pack from the expansion control carrier.
Place the circuit pack in an antistatic carrier.
4. Insert the TN2312BP Internet Protocol Server Interface (IPSI) circuit pack part way into the
TONE-CLOCK slot.
5. With the red line on the bottom (pin 1), attach one end of the short ribbon cable to the
connector on the component side of the TN 2312BP circuit pack. See Ribbon cable
connector on page 718.
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