Specifications

Jumper Configurations
Table A-1
Jumper Descriptions (continued).
JUMPER # DESCRIPTION
W63 Install W63 to connect the STD bus auxiliary
ground (AUXGND) signal to the STD bus
logic ground (GND). These two grounds
must be attached for proper operation of the
RS-232-C drivers and receivers. Ziatech-
supplied card cage and power supply
assemblies already connect AUXGND with
GND in the backplane; therefore, installation
of W63 is not necessary. Remove W63 to
disconnect AUXGND from GND on the
ZT 8809A. Factory default installs W63.
W63 Function
IN † Connect logic ground to AUXGND
OUT Separate logic ground from AUXGND
A-48