For most applications utilizing the 56k CSU interface module, no additional configuration is required on the Passport 4400 beyond what is defined in the Configuring and Operating Passport 4400 Software, Configure Connections to the Passport Network.
In the event it is necessary to fine-tune the 56k CSU, use the following Configurator or CLI procedures to meet your application requirements:
Configurator Procedure for Configuring a 56k CSU Interface
CLI Procedure for Configuring a 56k CSU Interface