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Communication Manager Maintenance-Object Repair Procedures
1802 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
the standby PKT-INT. In S8700 Multi-Connect, the active media server communicates directly
with both active and standby PKT-INTs and performs maintenance activities on both PKT-INTs
without the standby media server getting involved.
Earlier G3r PKT-INT duplication relied on the duplication hardware to automatically duplicate
and write each command from the processor into the active and standby PKT-INT’s dual-port
RAMs. The standby PKT-INT was always up-to-date with the state of every link terminated by
the active PKT-INT. On S8700 Multi-Connect, there is no dedicated hardware to keep the
standby PKT-INT up-to-date. Instead, the PCD refreshes the standby PKT-INT prior to an
interchange.
Executing a PKT-INT Interchange
There are two ways to interchange PKT-INTs, spontaneous and planned.
● A spontaneous interchange is usually caused by a fault, and:
- Stable calls are retained
- LAPD links are restarted
- Some data may be lost
● A planned interchange can be requested by Services’ personnel or by software for
maintenance or periodic testing.
- LAPD links are migrated from the active to the standby PKT-INT
- No data is lost during the interchange
The active media server’s PCD has socket connections to both active and standby IPSIs. Media
server interchange and IPSI interchange are independent of each other. IPSIs in a PN can be
interchanged independently of IPSIs in other PNs.
Spontaneous PKT-INT Interchange
For S8700 Multi-Connect, the standby PKT-INT is not kept up-to-date with the links terminated
by the active PKT-INT. During a spontaneous interchange of PKT-INTs, the standby PKT-INT is
refreshed with the link information by the active PCD and the standby PKT-INT is activated with
a warm reset. As with G3r, a spontaneous interchange of PKT-INTs may result in loss of some
up-stream and down-stream data.
● PCD maintains socket connections to the active and the standby PKT-INTs, via the SIM.
● Media server sends control and data packets only to the active PKT-INT.
● Standby PKT-INT has no information about the LAPD links.
● On a spontaneous interchange, the standby PKT-INT is “refreshed” by the PCD. That
means the LAT and the LCT are sent to the PKT-INT, and the standby PKT-INT is made
active by a warm interrupt.