Edit Port Configuration


To change the Port Configuration parameters:

  1. Select an option in the drop-down boxes or type a value in a text field. The selections are described in the table below.

  2. 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.

OT-21 Graphics/Port/EditPortConfig.gif