BITS Facilities
Use the Timing > BITS Facilities subtab to provision the BITS In and BITS Out parameters.
 
Item
Description
BITS In
Fields in this group provision the BITS In parameters.
Facility Type (BITS In)
Provisions the BITS In facility type. The ONS 15454 SDH supports E1 or 2 Mhz. With TCC2P cards and software R6.0 or later, 64 Khz is also an option.
The ONS 15600 SDH options are E1, 2 Mhz, 64Khz+8Khz, and DS1. The ONS 15454 M2 SDH supports E1, 2 Mhz, 64Khz+8Khz options.
BITS In State
Provisions the BITS In state to unlocked or locked. If Timing Mode is set to External or Mixed, set the BITS In State for BITS-1 and/or BITS-2 to unlocked, depending on whether one or both BITS input pin pairs on the MIC-C/T/P are connected to the external timing source. If Timing Mode is set to Line, set the BITS In State to locked.
Coding
The coding used by your BITS In reference, either HDB3 or AMI (alternate mark inversion). If you selected 2 MHz, the coding option is disabled.
Framing
The framing used by your BITS In reference (unframed, FAS, FAS+CAS, FAS+CRC, FAX+CAS+CRC). If you selected 2 MHz, the framing option is disabled.
Sync Messaging
If checked, enables the synchronization status message (SSM) for BITS In. (SSM is not available if Framing is set to unframed, FAS, or FAS+CAS.)
Admin SSM
If the Sync Messaging check box is not checked, you can choose the SSM from the drop-down list.
Sa Bit
The Sa bit transmits the SSM message. If you selected 2 MHz, the Sa bit option is disabled.
Cable Type
Displays 75 ohm or 120 ohm.
BITS Out
Fields in this group provision the BITS Out parameters.
Facility Type (BITS Out)
Provisions the BITS Out facility type (E1, etc.). With TCC2P cards and software R6.0 or later, 64 Khz is an option.
BITS State (BITS Out State)
Provisions the BITS Out state to unlocked or locked. If Timing Mode is set to External or Mixed, set the BITS Out State for BITS-1 and/or BITS-2 to unlocked, depending on whether one or both BITS input pin pairs on the MIC-C/T/P are connected to the external timing source. If Timing Mode is set to Line, set the BITS Out State to locked.
Coding
The coding used by your BITS Out reference, either HDB3 or AMI.
Framing
The framing used by your BITS Out reference (unframed, FAS, FAS+CAS, FAS+CRC, FAX+CAS+CRC).
AIS Threshold
The AIS threshold is used when SSM is disabled or framing is set to unframed, FAS, or FAS + CAS. The AIS threshold sets the quality level at which a node sends an AIS from the BITS-1 Out and BITS-2 Out FMEC connectors. When node timing is at or below the AIS threshold quality, an AIS is raised.
Sa Bit
The Sa bit transmits the SSM message. If you selected 2 MHz, the Sa bit option is disabled.
Cable Type
Displays 75 ohm or 120 ohm.
Apply
Applies changes to the Timing > BITS Facilities subtab.
Reset
Cancels Timing > BITS Facilities subtab changes and returns the fields to their last-saved settings.
Help
Displays context-sensitive help.

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