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PKT-INT (Packet Interface)
Issue 1 June 2005 1801
S8700 IP
: All port networks must have IPSI/PKT-INTs. They can be all simplex (one IPSI per PN)
or all duplex (two IPSI per PN).
Figure 104: Distributed PKT-INTs
S8700 MC
PKT-INT Interchange
In G3r systems, PKT-INT interchange was an integral part of an SPE interchange. In S8700
Multi-Connect, PKT-INT interchange is independent of media server interchange, and a
PKT-INT interchange can occur without a media server interchange and vice versa. In S8700
Multi-Connect, the active media server’s packet control driver (PCD) has sockets to both active
and standby IPSIs and exchanges heartbeats with both. The active PCD is responsible for
bringing up the active PKT-INT, and for bringing up the standby PKT-INT into the standby mode.
This is different than the G3r, where the standby PCD brings up the standby PKT-INT into the
standby mode. The standby PCD also has sockets to both active and standby IPSIs and
exchanges heartbeats with both. The standby PCD only talks to the IPSI SIM, and does not
communicate with the PKT-INTs. In the DEFINITY Server R, the active media server
communicated with the standby media server via the SMM to perform maintenance activities on
IPSI IPSI
EI
PN 1
IPSI IPSI
PN 2 PN 3
Server A Server B
Control Network A Control Network B
PKT pktpktPKT
Bearer Network A Bearer Network B
PCD
PN 4
EI
BRI/PRI
EI EI EI EI EI EI
BRI/PRI BRI/PRI BRI/PRI
Legend:
PCD connection
Local LAPD
Inter-PN LAPD
Inter-PN LAPD
PKT
Active PKT-INT
pkt
Standby PKT-INT