Avaya S8700 - Change System-Parameters Maintenance

TONE-BD (Tone-Clock Circuit Pack)
Issue 1 May 2002
8-1175555-233-142
Tone-Clock Interchange Strategy
There are three types of Tone-Clock interchanges:
■ Autonomous interchanges initiated as a part of maintenance software
strategy for the IPSI circuit packs.
■ Manual interchanges initiated by entering the set tone-clock or set
ipserver-interface command.
■ Firmware-initiated Tone-Clock interchanges
Software Instigated Tone-Clock Interchanges
Tone-Clock interchanges may be initiated by software in three ways:
1. A scheduled Tone-Clock or IPSI circuit pack interchange occurs according
to the parameters set by the change system-parameters maintenance
command. This parameter can be disabled or set to run weekly, the default
is for it to occur daily, at a time specified in the system-parameters list for
scheduled maintenance to begin. This interchange will be blocked, if the
non-preferred Tone-Clock or IPSI circuit pack in an EPN that has been
selected with the set tone-clock or set ipserver-interface command.
Also if the standby Tone-Clock or IPSI has been set to the busyout state, or
if the clock generation capability is known to be impaired. When this
scheduled interchange occurs, the standby Tone-Clock or IPSI circuit pack
becomes active for twenty seconds to test its ability to generate clock
signals. For IPSI scheduled interchanges, the other IPSI modules located
on the IPSI circuit pack, i.e. the Packet interface and Archangel are also
tested. After testing the IPSI is returned to standby mode.
For Non-IPSI Port Networks, unscheduled interchanges occur when
on-board Tone-Clock circuit-pack maintenance, or ongoing switch
maintenance test of the TONE-BD, TONE-PT or the TDM-CLK uncover
failures serious enough to raise a MAJOR or MINOR alarm against the
active IPSI circuit pack.
5 Connection from the Servers to the Ethernet Switch.
6 Ethernet Switch - A device that provides for port multiplication by having more than one network
segment. In an IP Connect environment, the Ethernet Switch should support 802.1 ip/Q, VLAN
and 10/100 mbps.
7
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8 Port Network - optional configuration of Media Gateways that provides increased switch
capacity.
9 IPSI - provides transport of CCMS messages over IP allowing the S8700 Media Server to
communicate with the Port Networks.
10 Customer LAN
# Description of Components and Connections in Figure 8-50