
Customizing Line Protocols
3-51
Parameter: Framing Mode
Default: SONET
Options: SDH
| SONET | CBIT | M23 | G751 | G832
Function: Specifies the transceiver mode for the physical interface.
Instructions: Select a transceiver mode as follows:
– SDH or SONET for OC-3 modules
– CBIT or M23 for DS3 modules
– G751 or G832 for E3 modules
MIB Object ID: 1.3.6.1.4.1.18.3.4.23.3.2.1.17
Parameter: Clocking Signal Source
Default: Internal
Options: Internal
| External
Function: Specifies whether the router uses its internal clock or an external clock for
time signals on this interface.
Instructions: Select Internal to use the router’s clock; select External to use an external
clock.
MIB Object ID: 1.3.6.1.4.1.18.3.4.23.3.2.1.18
Parameter: DS3 Line Build Out
Default: Short
Options: Short
| Long
Function: Conditions router signals to mitigate attenuation, which depends on the
physical length of the line.
You can set this parameter only when using DS3 modules.
Instructions: Select Short for lines shorter than 225 ft; select Long for lines 225 ft or
longer.
MIB Object ID: 1.3.6.1.4.1.18.3.4.23.3.2.1.23
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