Reference Guide

ZCOM Tables and Data Structures
Physical Terminal Tables
Chapter 368
Physical Terminal Tables
The physical terminal table (zptt_type) contains information used by the
LDM and DAM to initialize and control a physical terminal (or other
device). The PTT consists of a system area, which is reserved for use by
the ZCOM subsystem, and a user area which may be manipulated by
application programs. The user modifiable portion of the PTT
immediately follows the reserved area. The layout of the PTT is shown in
Table 3-11 and Table 3-12.
Table 3-11 Physical Terminal Tables (System Area)
Field Name Field Description Field Type
Size
(Bytes)
PTZLU Owning terminal ZLU number uns.short 2
PTZCS Owning terminal ZLU checksum uns.short 2
PTMUX MUX number for this terminal uns.short 2
PTPORT Port number within interface uns.char 1
PTTERM Terminal number within port uns.char 1
PTMX_TERM Terminal number in card uns.short 2
SUBCH Subchannel number on port uns.short 2
PTZPRCVR ZCOM address of primary receiver struct 6
PTZPCTL_RCVR ZCOM address of primary control
receiver
struct 6
PTZSHRCVRS Pointer to list of shared receivers pointer 8
PTZSHCTLRCVR
S
Pointer to list of shared control
receivers
pointer 8
PTLIST Pointer to next PTT of same port pointer 8
PTTXLX Pointer to next PTT on express list pointer 8
PTTXQX Express transmit buffer queue struct 56