ACC Programmer's Reference Guide

68 Chapter3
ZCOM Tables and Data Structures
Physical Terminal Tables
PTZLU - Owning terminal ZLU number
PTZCS - Owning terminal ZLU checksum
The terminal ZLU number points back to the ZLU table entry for the
owner of the terminal. The ZLU contains the checksum for the ZLU as
well as its number. It is used by the driver to derive the source ZLU for
all messages received for this physical terminal. This parameter is
initially setup by TTGEN in the memory image file. These fields are
maintained by the ZCOM subsystem when ZLU and terminal linkage are
modified.
PTMUX - Mux number of t erminal
The Mux interface number of the terminal. This i s set initially through
the TTGEN configuration file and is subsequently maintainable.
PTPORT - Terminal port number
The port number of the terminal on the Mux interface. This is set
initially through the TTGEN configuration file and is subsequently
maintainable.
PTTERM - Terminal number within port
The terminal number on the Mux interface card within the port. This is
set initially through the TTGEN configuration file and is subsequently
maintainable. This field has been replaced by the ptmx_term field. It
remains valid for 2/8-channel cards for backwards compatibility reasons.
PTMX_TERM - Terminal number within port or card
This field contains the firmware terminal number this terminal ZLU is
associated with. The firmware manages terminals using a terminal
number while the ZCOM subsystem manages terminals using ZLUs on
the host. On 2/8-channel cards, the terminal number must be unique for
a given port. On E1/T1 cards, the terminal number is unique per card.
SUBCH - Subchannel number within port
This field contains the subchannel this terminal ZLU is configured on. If
the card does not support subchannels, this field is set to zero.
PTZPRCVR - ZCOM address of primary receiver
Node number, ZLU, and checksum used as the destination address for
normal messages and unsolicited status messages received for this
physical terminal. This field is set by the zset_rcvr call (mode 0 or mode 1
if multiplexed terminal).