Avaya Configuring Line Services Manual de usuario Pagina 218

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Site Manager Line Services Parameters
114078 Rev. A A-31
LAPB Parameters
You access the Link Access Procedure Balanced (LAPB) Line Parameters from
the Configuration Manager.
Parameter: External Clock Speed
Path: HSSI Connector > Edit Line > Edit HSSI Parameters
Default: 46359642 (44.736 MB/s)
Options: 307200 to 52638515
Function: Specifies the bandwidth that the HSSI channel provides.
The HSSI specification requires that the DCE provide a transmit clock that
times data transfer across the DTE/DCE interface. The value you set for this
parameter does not actually affect hardware initialization. Some routing
protocol software uses this parameter value for route selection.
Instructions: Enter a value equal or close to the data transmission rate across the HSSI.
MIB Object ID: 1.3.6.1.4.1.18.3.4.7.14
Parameter: CRC Size
Path: HSSI Connector > Edit Line > Edit HSSI Parameters
Default: 32 bit
Options: 16 bit
| 32 bit
Function: Specifies an error detection scheme. You can choose either 16-bit (standard
ITU-T) or 32-bit (extended) to detect errors in the packet.
Instructions: Set this parameter to either 16-bit or 32-bit, making certain that the remote end
of the HSSI connection is configured for the same value.
MIB Object ID: 1.3.6.1.4.1.18.3.4.7.15
Note: When you edit an Octal Sync link module line, or any synchronous line
on Bay Networks AN or ASN routers, the router automatically configures the
LAPB protocol if you configure a circuit for the X.25 protocol. The Edit
SYNC Parameters window for these lines includes an additional button for
editing LAPB parameters.
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