Avaya 03-300430 User Manual

The TN799 Control LAN (C-LAN) packet port circuit pack provides TCP/IP connection to 
adjunct applications such as CMS, INTUITY, and DCS Networking.  The C-LAN circuit pack has 
one 10baseT Ethernet connection and up to 16 DS0 physical interfaces for PPP connections. 
C-LAN also extends ISDN capabilities to csi models by providing packet-bus access.
An RSCL (remote socket control link) links the C-LAN and the server to pass call- control and 
other management information.  Because one link serves every port on the circuit pack, 
maintenance of the RSCL is part of the C-LAN circuit-pack maintenance.
The TN799 C-LAN circuit pack combines the functions of the PGATE and PI circuit packs into 
one circuit pack. Use a PGATE or PI with a C-LAN to create an X.25-to-TCP/IP bridge for 
adjunct and DCS connectivity.

Prior to Communication Manager Release 2.0, IP endpoints registered to C-LANs (TN799x) on 
a round-robin algorithm, where an IP endpoint registers to the next available C-LAN within a list 
of available C-LANs. In a system with two or more C-LANs, this distribution method can result in 
one C-LAN controlling the majority of IP endpoints. This skewed distribution of endpoints among 
available C-LANs results in a vulnerability to a higher loss of telephony resources in the event of 
a C-LAN failure than if the IP endpoints were more uniformly distributed across the available 
C-LANs. 
With Communication Manager Release 2.0, a new feature provides for a more uniform 
balancing of the load across the available C-LANs. With this feature, an IP endpoint registers to 
the C-LAN with the least number of used sockets (regardless of the number of available 
sockets). This will apply to the following IP endpoints:

●

H.245, H.248, and H.323 signaling groups

●

H.323 stations

●

SIP endpoints

CLAN-BD

MIN

test board location long

Control LAN circuit pack

CLAN-BD

WRN

test board location short Control LAN circuit pack