ACC Utilities Reference Guide

42 Chapter2
TTGEN-ZCOMSystemTableGenerator
Creating the TTGEN Configuration File
Port-Limit
This li mit applies to ACC cards other than the E1/T1 ACC cards and the
Z7340A 8-port PCI ACC card. ACC E1/T1 cards and the Z7340A ACC
have their o wn port-limit value, mentioned i n the E1T1-Port-Limit
section further down.
The default limit (in bytes) of all unacknowledged transmit messages to
terminals on a port. T his parameter controls how much o utbound data is
allowed onto the ACC card for each port. Each port has 24,000 bytes of
memory available for outbound data buffers (including protocol packets).
Thisparameterisusedtopreventthehostfromexceedingtheavailable
memoryonthecard,therebycausingthehosttoretrythetransaction.
This parameter applies to all non-E1/T1 ports on the system. The
recommended value is 20,000 bytes. It must be less than 24,000 bytes.
Note that you may override this global value on a port-by-port basis by
using the Port-Limit parameter in the Port-Definition section.
E1T1-Port-Limit
This limit applies to E1/T1 ACC cards and the Z7340A 8-port PCI ACC
card.
The default limit (in bytes) of all unacknowledged transmit messages to
terminals on a subchannel of a port on an ACC E1/T1 card, or a port of
the Z7340A 8-port PCI ACC card. This parameter is identical in function
to the Port-Limit parameter mentioned previously; however, this
parameter only applies t o the ACC E1/T1 card and the Z7340A 8-port
PCI ACC card. The recommended value is 100K bytes. The recommended
value assumes m any subchannels per port.
Note that you may override this global value on a port-by-port basis by
using the Port-Limit parameter in the Port-Definition section. If your
configuration uses just a few subchannels on a port, you s hould use the
Port-Limit parameter in the Po rt-Definition section to increase the limit
forthatparticularportonly.