BITS Facilities


Use the Timing > BITS Facilities subtab to provision the building integrated timing supply (BITS) In and BITS Out parameters.

Item

Description

BITS In area

Fields in this area provision the BITS In parameters.

Facility Type

Provisions the BITS In facility type (DS1 or 64 Khz).

BITS In State

Provisions the BITS In state to In-Service (IS) or Out-of-Service (OOS). If Timing Mode is set to External or Mixed, set the BITS In State for BITS-1 and/or BITS-2 to IS (In Service) depending whether one or both BITS input pin pairs on the backplane are connected to the external timing source. If Timing Mode is set to Line, set the BITS In State to OOS.

Coding

The coding used by your BITS In reference, either B8ZS or AMI.

Framing

The framing used by your BITS In reference, either Extended Super Frame (ESF), or Super Frame (SF) (D4).

Sync Messaging

If checked, enables the Synchronization Status Message (SSM) for BITS In. (SSM is not available if Framing is set to Super Frame.)

Admin SSM

(ONS 15310-CL, ONS 15327, and ONS 15454 only) If the Sync Messaging check box is not checked, you can choose the SSM Generation 2 type from the drop-down list.

BITS Out area

Fields in this area provision the BITS Out parameters.

Facility Type

Provisions the BITS Out facility type (DS1 or 64 Khz).

BITS Out State

Provisions the BITS Out state to IS or OOS. If Timing Mode is set to External or Mixed, set the BITS In State for BITS-1 and/or BITS-2 to IS depending whether one or both BITS input pin pairs on the backplane are connected to the external timing source. If Timing Mode is set to Line, set the BITS In State to OOS.

Coding

The coding used by your BITS Out reference, either B8ZS or AMI.

Framing

The framing used by your BITS Out reference, either ESF or SF (D4).

AIS Threshold

If SSM is disabled or Super Frame is used, sets the quality level where a node sends an alarm indication signal (AIS) from the BITS-1 Out and BITS-2 Out backplane pins. An AIS is raised when the optical source for the BITS reference falls to or below the SSM quality level defined in this field.

LBO

When timing external equipment connected to the BITS Out pins, sets the distance between the device and the ONS node. Options are 0-133 ft. (default), 124-266 ft., 267-399 ft., 400-533 ft., and 534-655 ft.

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.