Migrating a DEFINITY Server SI in an MCC to an S8700-Series Media Server with Fiber-PNC
716 Upgrading, Migrating, and Converting Media Servers and Gateways
Replacing tone clocks with IPSI circuit packs
and replacing maintenance circuit packs
Note:
Note: Before you start, read this procedure and Assigning IP addresses to the IPSI
circuit packs on page 734. If you use a DHCP server, you can set the switch ID
and the cabinet number on the IPSI circuit pack. However, you must complete
certain sequences before to a predetermined timeout interval. If you do not set
the switch ID and the cabinet number when you first install the circuit pack it can
be done later but it requires that the circuit pack be reseated. This might result in
an additional service interruption in a duplex reliability configurations.
Determining IPSI placement in port networks
Use this information to determine in which PNs you must install the IPSI circuit packs. Not all
PNs require IPSI circuit packs. PNs that do not contain an IPSI have an Expansion Interface
(EI) circuit pack that controls the PN. These EI-controlled PNs are assigned automatically to an
IPSI when the system is initialized. The system automatically balances the EI-controlled PNs
among the available IPSIs.
Also, with Communication Manager Release 2.0 or later, you can put an IPSI in a
DS1-C-remoted PN.
To place the IPSI circuit packs correctly, follow these rules:
● When you place an IPSI in a DS1-C-remoted port network, make sure that you administer
the nonremoted IPSI first and that you set the IP Control field to y. You do not have to set
the IPSI in the DS1-C-remoted PN to no. However, if set to y, customers must run
Ethernet from the IPSI and there is limited control (1:2 versus 1:5).
● Place the reference IPSI in the PN with the shortest Ethernet connection to the media
servers. The reference IPSI is the one whose serial number is used in the license file. This
placement minimizes the amount of data network that could fail between the IPSI and the
media servers and cause the system to switch to No License mode.
● Use the following formulas to determine the minimum number of PNs that require an IPSI:
- Duplex (direct connect): One IPSI controls up to three PNs. If you use one or two PNs
and you add a G650 media gateway PN, it may have an IPSI. If you use two IPSIs, the IP
control for one IPSI is yes and the other is no.
- Duplex (CSS or ATM): Divide the total number of PNs by 5 (if the result is not an integer,
round up), and add one.
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