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Disabling T3 C-Bit Parity Mode

 

C-bit parity mode controls the type of framing that is present on the transmitted T3 signal. When C-bit parity mode is enabled, the C-bit positions are used for the FEBE, FEAC, terminal data link, path parity, and mode indicator bits, as defined in ANSI T1.107a-1989. When C-bit parity mode is disabled, the basic T3 framing mode (M23) is used.

By default, C-bit parity mode is enabled. To disable C-bit parity mode and use M23 framing for your T3 link, include the no-cbit-parity statement at the [edit interfaces interface-name t3-options] hierarchy level:

Note

For ATM, ATM2 IQ2, IQ2-E, and T3 interfaces, M23 framing is used when the no-cbit-parity statement is included. For all other interfaces, M13 framing is used when the no-cbit-parity statement is included.

To return to the default, enabling C-bit parity mode, delete the no-cbit-parity statement from the configuration:

To explicitly enable C-bit parity mode, include the cbit-parity statement at the [edit interfaces interface-name t3-options] hierarchy level:

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