Migration tasks
Issue 2.1 June 2006 691
Stacking the port media gateways
To stack the port media gateways:
1. If needed, stack a port media gateway (J58890H) on top of the expansion control media
gateway.
2. If needed, stack a third and a fourth port media gateway on top of the first port media
gateway.
3. Install the new CFY1B CURL unit on the back of control cabinet A.
4. Connect the following cables to the back of all the media gateways:
● TDM/LAN
● ICC-A, ICC-B
Installing IPSI and maintenance circuit packs
If this PN does not contain an IPSI, install the tone clock and the maintenance circuit packs, as
required. Then continue with Installing Expansion Interface circuit packs
on page 785.
If this PN contains one or two IPSIs, reinstall the IPSIs and the ribbon cables as you did before.
For the procedures, see Duplex reliability configuration
on page 779 and High-reliability or
critical-reliability configuration on page 782.
Installing Expansion Interface circuit packs
Note:
Note: If the existing PPN has a TN776 or TN570 Expansion Interface circuit pack(s),
you must replace them with a TN570B Expansion Interface, vintage 7, or higher
circuit pack.
If this system is to be used with an Enterprise Survivable Server (ESS), replace the
TN776 or TN570 Expansion Interface circuit packs with a TN570D Expansion
Interface or later circuit pack.
To install the Expansion Interface circuit packs:
1. Remove the existing circuit pack and place in an antistatic carrier or bag.
2. Insert the TN570C or higher EI circuit packs into the EXPN INTFC slots (A01, B02).
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