ACC Programmer's Reference Guide

Chapter 3 89
ZCOM Tables and Data Structures
Interface Table
IPORTN - Port configuration buffer (zpconf_type)
This array contains the configuration bytes for each port on the Mux
card. The Port statements in the Port-Definition section of the TTGEN
configuration file are used to define the initial values of this array. Each
element of the array is associated with a single port on the Mux card.
Each element can be dynamically configured by calling the zport routine.
The layout is similar to the data portion of the $PORT backplane
transactio n comma nd for the 2/8-channel ACC cards and is as shown in
Table 3-19.
The layout for the 4-channel E1/T1 ACC card is as follows:
Table 3-19 Port Configuration Buffer IPORTN
31-30 29-28 27-26 25-24 23-22 21-20 19-16 15-14 13-0
ecode sync mode parity xclock sclock baud pmode spare
Table 3-20 4-Channel E1/T1 ACC Card Format
31-30 29-26 26-22 21-20 19-16 15-11 10-0
ecode fmode spare sclock spare pmode spare
ecode - Encoding modes
sync - Sync mode select
mode - Operating mode
parity - Parity select
xclock - Clock multiplier
sclock - Clock source
baud - Baud rate value
pmode - Port mode select
fmode - Frame mode select
spare - Reserve, not used