COMSPHERE 3550 Series Data Service Units
4-2 December 1996 3550-A2-GB20-20
Control Branch 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter Control 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LEDs 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Leads 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying External Leads 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing External Leads 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reporting External Lead Changes to NMS 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Message Branch 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview
A 3550 Series DSU can be managed from its control
panel or from the COMSPHEREr 6700 Series NMS. This
chapter describes how to manage the DSU using the
control panel. Refer to the COMSPHERE 6700 Series
Data Network Management System, User
’
s Guide
to
understand how to manage the unit from the NMS.
The DSU’
s menus are or
ganized as a branching
hierarchy, sometimes referred to as a menu tree. Refer to
Appendix A as you perform the procedures described in
this guide to help you quickly learn more about your
DSU.
DCP and SDCP Operation
There are two types of control panels, one for each
DSU model. The standalone Model 3550 DSU
(Figure 4-1), is controlled from its diagnostic control
panel (DCP); the carrier-mounted (nest- or rack-mounted)
Model 3551 DSU (Figure 4-2) is controlled from a shared
diagnostic control panel (SDCP). The SDCP is mounted
onto the COMSPHEREr 3000 Series Carrier to control
multiple units.
NOTE
Throughout this guide, DCP refers to
either control panel,

DCP

or

SDCP

,
except where a distinction is made.
OK Dial TXD RXD RTS DSR DTR
105 106 107 108
COMSPHERE 3550
496-14462-01
F1 F2 F3
CTSTest
109
Alrm LSD
103 104
KEYPAD
NETWORK/DEVICE
ALARM
LCD
DISPLAY
DTE STATUS INDICATORS
TEST
MODE
DIAL
BACKUP
Figure 4-1. Model 3550 Diagnostic Control Panel