363-206-305
Operations Interfaces
6-2
Issue 3 June 2000
Complete detailed information on the OS interfaces is provided in 824-102-151,
Lucent Technologies
DDM-2000 Multiplexers Operations Systems Engineering
Guide
.
Additional information about the OI features in multi-vendor subnetworks is
provided in 824-102-144, Lucent Technologies
2000 Product Family Multi-Vendor
Operations Interworking Guide
.
Craft Interface Terminals (CIT)
6
The DDM-2000 FiberReach Multiplexer supports a user friendly text-based
interface called the craft interface. A simple industry standard VT-100 computer
terminal or a personal computer (PC) or a computer emulating a VT-100 computer
terminal is all that is needed for the craft interface. The computer terminal or the
PC may be connected to the DDM-2000 FiberReach Multiplexer either via the
front CIT port or to the front or rear CIT of another DDM-2000 in the same
subnetwork. In the latter case, the SONET data communications channel (DCC)
will also serve as the connection between the computer terminal and the target
DDM-2000 FiberReach Multiplexer. These access mechanisms are explained
further in the following sections.
CIT Access
6
Figure 6-1 shows the system has one EIA-232-D compatible interface for a CIT.
The front access interface is configured as data communications equipment
(DCE) for direct CIT access (CIT 1). The front access port is configured as a data
circuit terminating equipment (DCE) for direct terminal access. The front CIT port
provides data rates of 300, 1200, 2400, 4800, 9600, and 19200 baud. Figure 6-2
shows how a null modem and a modem can be connected to the CIT interface.
The data rate of the DDM-2000 FiberReach Multiplexer is automatically set to
match the data rate of the terminal (autobaud).
For the Wall DT, the front cover must be open to connect the modem.
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