Installation and Setup
076R160-000
SpectraComm 800 T3 Data Service Unit
2-3
Issue 4
Installation and Operation Manual
Hardware Options
Shelf Slot Addressing Guidelines
•
The DSU communicates with an SNMP controller through the SpectraComm Manager card
(SCM) co-located in the shelf.
•
The network management system employs a slot-line-drop method of addressing network
elements:
•
Slot address is the number of the slot it occupies in the SpectraComm Shelf.
•
Line address is always 1, drop 0 is the master unit, and drop 1 is the the remote unit.
•
If the firmware is ever changed on the SC800 T3, the EEPROM containing the unit’s
configuration will be erased and the unit will have to be reassigned using the new serial number.
Note
The DSU serial number must be reported to the system controller operator when the unit is initially installed
and configured. The serial number is located on the back of the front panel.
Timing Options
While the SC 800 T3 DSU can occupy the same shelf as other components of a SpectraComm
system and be controlled through an SCM card that is also controlling other SpectraComm system
cards, the SC 800 T3 DSU timing is completely independent from the SpectraComm shelf timing.
Timing options determine the clock source for data the SC 800 T3 DSU transmits at its network
interface, and for both transmit and receive channel data. The SC 800 T3 DSU supports two timing
modes:
•
Recovered Timing (default), based on the incoming signal from the network.
•
Internal Timing, provided by the oscillator incorporated in the DSU.
SpectraComm 800 T3 Card Options
and the associated illustration describe the card option switch locations and their factory
default settings.
Summary of Contents for SpectraComm 800 T3
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