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

Provisions the BITS facility type (E1 or 2 Mhz).

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.

BITS Out

Fields in this group provision the BITS Out parameters.

Facility Type

Provisions the BITS Out facility type (E1 or 2 Mhz).

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 alarm indication signal (AIS) from the BITS-1 Out and BITS-2 Out FMEC connectors. When a node times 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.

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.