Avaya MCC1 Maintenance Procedures page 106

Hardware configurations
Basic server and IPSI connections
Figure notes
1 Administration PC — used to access
S8700 Media Server over the corporate
LAN
2 Corporate LAN
3 Corporate LAN interface: default Ethernet
4 — S8700 Media Server's Ethernet link
to the LAN. Used for administration and
can be used for alarming through simple
network message protocol (SNMP) traps
to the Initialization and Administration
System (INADS).
4 S8700 Media Server — two are always
present, one in active mode and the other
on standby.
5 Duplication interface: default Ethernet 2.
The dedicated Ethernet connection
between the S8700 Media Servers.
106
8 Network control B interface: default Ethernet
3. The server's Ethernet connection to a
duplicated set of Ethernet switches.
This private LAN carries control signals for
the PNs when the primary control network is
unavailable.
Control network B connects to the secondary
IPSI board in a PN. When the system
problem is resolved, primary control is
returned to control network A.
9 Ethernet switch — at least one is required to
support each control network.
10 UPS — Keeps the S8700 Media Servers and
Ethernet switches functional through brief
power outages. Usually, UPS 1 powers
server 1 and its Ethernet switch, and UPS 2
powers server 2 and its Ethernet switch.
11 PN — provides telecommunications
functions of the S8700 Multi-Connect Media
Server.
For High Reliability, each IPSI-connected
PN contains a pair of IPSI circuit packs, one
primary circuit pack and a duplicate
secondary circuit pack as a backup.
For Critical Reliability, the bearer network
among the port networks is also duplicated.
This means that two EI circuit packs or two
ATM circuit packs are present in each PN
instead of just one.
12 IPSI — IPSI circuit pack is duplicated in
every IPSI-connected PN in a high reliability
or critical reliability configuration.
The primary IPSI is connected to control
network A. It is the preferred IPSI because it
has better control over activating the clock
than the secondary IPSI.
The secondary IPSI is connected to control
network B. This IPSI takes over in case of
problems with the primary control network.
The S8700 Media Server regularly tests the
duplicated IPSI to make sure it is ready for
service, before returning control to the
primary IPSI.
Maintenance Procedures
December 2003