097-72020-01 Revision K – December 2005 TimeSource 3100 User’s Guide 25
Chapter 1 Overview of the TimeSource 3100
Functional Description
Figure 1-4. ESCIU Signals
Alarm Interface
The microprocessor delivers alarms to normally open dry-contact type connections.
Alarms are also indicated by the front-panel status lamps.
Communications Ports
Three RS-232 serial communications ports carry TL1 commands, responses, and
autonomous messages between the TimeSource 3100 and an external terminal.
Ethernet
TimeSource 3100 has six Ethernet ports to carry TL1 commands, responses, and
autonomous messages between the TimeSource 3100 and an external terminal, or
an Element Manager. The user can configure the IP address, subnet mask, and
gateway address for the Ethernet ports.
Four ports (5001, 5002, 5003, and 5004) are configured to act as though a
serial-port communication terminal were connected to them. These ports
communicate TL1 commands, responses and autonomous messages.
Two additional ports communicate with Element Managers, which may have NMS,
OSMF, or similar software. An Element Manager establishes a connection with one
port (5551) for TL1 commands and responses. Another port (5550) establishes a
connection to an Element Manager, sends autonomous messages, and closes the
connection when finished.
Passthrough
The Passthrough feature of the TimeSource 3100 allows the unit to front a DCD
product to provide one management interface for a user site. Passthrough allows a
user to do the following:
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