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Chapter 3. Installation
61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual 15
MAINTENANCE INTERFACE
The Maintenance interface is available at 9600 bps, 8 data bits, no
parity, no flow control, asynchronous format through the Mainte-
nance port. See Connector Pinouts on page 119 for the pinout of
the Maintenance port. A VT 100 terminal or null modem can be
connected to the Maintenance port using an EIA-232 cable. This
interface can be used to set internal S-registers, dial ISDN connec-
tions, and disconnect calls. This port also allows ADTRAN Tech-
nical Support personnel to retrieve vital information from the
unit if a problem is encountered during initial configuration of
the ISU 2x64. Most problems can be solved without resorting to
this port for assistance.
The ISU 2x64 Maintenance Help Screen can be activated by typ-
ing !? at either the DTE#1 or DTE#2 prompt. The screen is shown
in Figure 3-1.
Figure 3-1
VT 100 Maintenance Help Screen