To change the Port Configuration parameters:
Select an option in the drop-down boxes or type a value in a text field. The selections are described in the table below.
Click OK to accept changes and return to the Port Configuration window, or Cancel to return without saving changes.
Field / Section |
Description |
Port Configuration |
|
Framing |
Select the framing type: D4 or ESF for DS1 and CAS or CCS for E1 |
Compensation |
For ESF and D4 select length in feet (133, 266, 399, 533, 655) of the cable connecting the OT-21 to the network element being synchronized. For CAS,CCS, and 2048K select 75 or 120 ohms. |
Zero Suppression |
Select ON or OFF to suppress or not suppress leading zeros |
CRC |
Select ON or OFF. Select ON to check the integrity of a block of transmitted data (CRC Generation is only shown for E1 outputs) |
SSM |
Select ON or OFF. Select ON to reading SSM messages |
Bit |
Set the E1 bit position to 4,5,6,7, or 8 (SSM Bit is only shown for E1 outputs) |
AIS |
Select ON or OFF. Select ON to receive codes transmitted downstream in a digital network that show an upstream failure has been detected and alarmed |
PQL |
Enter a PQL number from 1 to 16. The Priority Quality Level (PQL) is a Synchronization Status Message (SSM) table which allows for translation between DS1 and E1 SSMs. |