
Configuring Line Services
5-22 114078 Rev. A
Setting the CRC Size
The Cyclic Redundancy Check (CRC) size specifies an error detection scheme.
You can choose either 16-bit (standard ITU-T) or 32-bit (extended) frame check
sequence (FCS) to detect errors in the packet. The remote end of the sychronous
connection must be configured for the same CRC size.
You can set a CRC size for the interface.
Setting the Signaling Method
You can specifythe signaling method that the router uses for this line with the
Sync Media Type parameter. Available media types are
• Default
•T1
•E1
• RAISEDTR
• V25BIS
• ISDN
• ISDNLEASEDLINE
You can set the media type used for the interface.
Enabling or Disabling Sync Polling
By default, a synchronous interface does not monitor the Data Set Ready (DSR)
signal. If you set this parameter to Enable, the synchronous driver is enabled when
the DSR is detected. When the DSR is no longer detected, the driver will be
disabled. Enable this parameter only if you will be using dial-up services.
You can enable or disable Sync Polling for the interface.
Site Manager: CRC Size parameter: page A-64
Site Manager: Sync Media Type parameter: page A-65
Site Manager: Sync Polling parameter: page A-67
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