Panasonic KX-TDA100 Programming Manual page 310

2.7 [1] Configuration
Feature Guide References
1.31.1 IP Proprietary Telephone (IP-PT)
NLP Setting
Selects whether the NLP (Non-Linear Processor) is used to control echo sound quality.
Value Range
Use Non-Linear Processor, Use Fixed TX Gain
Maintenance Console Location
2.7.36 [1-1] Slot—IP-Extension Card Property (KX-TDA100/KX-TDA200/KX-TDA600 only)
Programming Manual References
None
Feature Guide References
1.31.1 IP Proprietary Telephone (IP-PT)
310 PC Programming Manual