Overview
Issue 2.1 June 2006 1045
In a fiber-PNC configuration, the reliability level is an attribute of the communications system as
a whole. For IP-PNC port networks, the reliability level is an attribute of the individual PNs. The
converted communications system can include a mixture of fiber-PNC PNs and IP-PNC PNs. In
a mixed system, the fiber-PNC PNs have a single reliability level, and each IP-PNC PN has its
own reliability level. Therefore, no single reliability level can be attributed to a mixed fiber-PNC
and IP-PNC configuration.
Table 22
shows reliability options for the S8700 Series Media Server compared to reliability
options for a DEFINITY R system.
:
Table 22: Reliability options for DEFINITY R and S8700 Series
Reliability
option
DEFINITY Server R S8700 Series Media Server
Standard One common control carrier per system,
and single port network connectivity.
N/A
Duplex
N/A
● Two media servers
● Single control network
● One IPSI in each
IPSI-connected PN
● Two online uninterruptible
power supplies (UPSs)
● Single bearer connectivity
High Two common control carriers, and
single port network connectivity.
● Two media servers
● Duplicated control Network
● Two IPSIs in each
IPSI-connected PN
● Two online UPS
● Single bearer connectivity
Critical Two common control carriers, and
duplicated port network connectivity.
● Two media servers
● Duplicated control network
● Two IPSIs in each
IPSI-connected PN
● Two online UPS
● Duplicated bearer connectivity
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