DS-1 Service State Specifications

At the bottom of the DS-1 Spans object is an Object Table Tab. Within this Object Table tab are all the individual DS-1's associated with a particular interface. Click on one of the DS-1's in the list, this will display the individual DS-1 along with a set of provisioning buttons. The object pane that appears displays the service state of the individual DS-1 highlighted. The same set of buttons can also be accessed by right clicking on an individual CIC that is displayed under the object table tab. See information below.

Web GUI Page

Dialogic > IMG 2020 > Facility > DS3/Optical Mode:DS3 > DS-3 Interface > DS-1 Spans (Click on each individual DS-1)

-or-

Dialogic > IMG 2020 > Facility > DS-1 Spans (Click on each individual DS-1)

Open

Maximum Objects

Not Applicable.

Related Topics and Dependencies

DS-3 Interface

DS-1 Spans

Provisioning DS-1's

T1 Span Profile

E1 Span Profile 

Field Descriptions

Logical Span ID

Displays the logical span ID which is used by the IMG 2020 during configuration and call processing.

Physical Offset

Displays the physical offset of a specific DS-1.

Profile Name

Displays the T1 or E1 Profile that was configured on the selected DS-1.

Loop Timing

Primary and Secondary timing can be configured on any DS-1 except the DS-1's numbered as Physical Offset 0 and Physical Offset 1. These DS-1's are located on the T1/E1 RJ48 interfaces and are hard-coded to accept a Primary and/or Secondary timing source. The Object Table on the bottom of the DS-1 object (RJ46 Interface) will display in the loop timing column Primary Reference on physical offset 0 and Secondary Reference on physical offset 1.

Clear Timing - Clears Timing sources from the DS-1.

Set Primary - Set a timing source on the span selected. The timing source set can then be moved up or down the Timing Synchronization Priority List. This source is labeled Primary Loop in the Synchronization priority list. The timing source labeled Primary reference is by default, hard coded to reside on Span 0 and cannot be modified.

Set Secondary - Set a timing source on the span selected. The timing source set can then be moved up or down the Timing Synchronization Priority List. This source is labeled Secondary Loop in the Synchronization priority list. The timing source labeled Secondary reference is by default, hard coded to reside on Span 1 and cannot be modified.

Loopback Mode

No Loopback (Default) - Normal Operation

Local Loopback - Loops back transmit and receive on that individual span so that a far end piece of equipment can send a test such as a BERT test towards the local IMG 2020. The span on the front panel will blink orange when offset is in local loop-back.

Remote Loopback (CBIT Only) - The local IMG 2020 sends out a FEAC code to a far end piece of equipment telling it to loop an individual DS-1 within the DS-3. In this scenario, the DS-3 framing\signaling is not looped back. Remote Loopback is NOT supported on the T1/E1 DS-1's residing on the T1/E1 RJ48 interfaces.

Monitoring Fields

Span Status

Displays the status of the DS-1 selected.

Bipolar Violations

Displays the number of bipolar violations detected since the Clear Error Statistic button was last clicked on. The Bipolar Violation (BPV) indicates an error in the transmission of the signal whether it be AMI, or a modified version of AMI such as B8ZS, or Bit 7 zero suppression.

Frame Error Count

A framing error is generally the result of reading a string of symbols grouped in blocks starting at the wrong point. There may be no stop bit, start bit, incorrect number of bits, etc. The problem is usually noise on the line.

Frame Errors (T1) - If the span is T1, this field displays the number of frame bit errors.

Frame Errors (E1) - If the span is E1, this field displays frame alignment signal errors.

Slip Count

The number of slips detected since the Clear Error Statistic button was last clicked on. Slips are usually the result of a clocking problem. Synchronizing timing with the telco provider generally will solve the issue.

Remote Alarm Count

Displays the number of times the Remote Alarm Indication has been detected since the Clear Error Statistic button was last clicked on.  Receiving a remote alarm indication indicates the far end entity has a problem with the signal it is receiving from other far end equipment it is connected to.

Loss of Frame Count

The Number of times a Loss of Frame has been detected since the Clear Error Statistic button was last clicked on. Loss of Frame is an indication that one or more network frames did not get through the networking device. If a Loss of Frame is encountered it is likely that your network device is not correctly configured or is over subscribed.

Buttons

In Service - Brings the DS-1 into service from an Out of Service State. The DS-1 must be manually brought back in service following a loopback test. It will not automatically go back in service.

Out of Service - Takes the span out of service.

Clear Error Statistics - When troubleshooting a Network issues, the Clear Error Statistics button clears all the monitoring fields back to zero. Any errors that occur would be from the time the Clear Error Statistic button is clicked on. This allows a user the ability to count the number of errors within a specific interval of time.