12713020-002-2 Revision D – April 2004 SSU-2000 User’s Guide 49
Product Overview
Communications Protocol
Communications Protocol
This section summarizes the methods of controlling the SSU-2000 and the available
software features, depending upon the system functionality required.
Software Interface
There are four methods of controlling the SSU-2000. The control interfaces
available are:
TL1 – Transaction Language One
TL1 provides command sets to support all operation, administration, maintenance,
and provisioning tasks required to maintain and control an SSU-2000 system.
These tasks include configuring and provisioning security, monitoring system
performance, configuring hardware, locating and handling faults, and performing
equipment diagnosis and testing. Refer to TL1 Command Interface, on page 266,
for more information.
ICS – Interactive Command Set
ICS also provides command sets to support all operation, administration,
maintenance, and provisioning tasks required to maintain and control an SSU-2000
system from a terminal connected to one of the SSU-2000 RS-232 serial ports. ICS
commands are designed in a more readable interface for users with an instructional
help facility. Refer to Interactive Command Set, on page 315, for more information.
NTP – Network Time Protocol
The Network Time Protocol (NTP) is used to synchronize the time of a computer
client or server to another server or reference time source, such as a GPS receiver
or local timing source.
The SSU-2000 implements the NTP v.3 (RFC 1305) version. It can run as a server
application and a client application. In addition, a broadcast mode may be
implemented as either a server or client. The NTP server always runs and the client
and broadcast modes are enabled independently by assignment of addresses and
setting of timers. Refer to NTP Support, on page 382, for more information.
SNMP – Simple Network Management Protocol
The SSU-2000 offers two versions of SNMP: v2 and v3. SNMP v3 software offers
additional security with authentication and privacy parameters. The security feature
allows secure transactions to provide protection against modification of information,
masquerade, and message stream modification.
Simple Network Management Protocol (SNMP) is based on a client-server
query-response mode. A manager is the client generating the queries, while an
agent is the server generating the responses.
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