What level of dB attenuation can the LQ 2W auto-null achieve
Analogue 2W Partyline nulling is required to reduce echo and distortion on the 2W circuit
The LQ 2W auto-null circuit can achieve approx 60dB of attenuation
Run auto-null on all LQ 2wire ports
When nulling make sure all talk buttons are OFF on all external partyline systems
Auto-null: You must perform auto-null when any change in the connected 2-wire equipment occurs or there is a significant temperature change.
Expand port sections and click on the Auto-Nulling button for each port
The auto-nulling operation emits a loud hiss on the circuit. Do not wear headsets during the nulling process
When auto-nulling, ensure that all talk buttons on external Partyline devices are turned off.
General guidance If you're getting feedback or howlround on your PL system there are number of possible causes
Cause 1: Listen Level control at this station or a Remote Station is set too high.
Cause 2: Sidetone Null control at this station or a Remote Station is not adjusted correctly.
Solution 2 : please adjust the sidetone or Null PL channel on this Station
Cause 3: Channel un-terminated.
Solution 3: Set the Main Station or Power Supply termination switch for that channel to the ON position. There should be only one termination per intercom channel
Cause 4: A headset extension cord was used.
Solution 4: Headset extension cords are not recommended as they can cause pickup between the headset mic and head-phones
CAN'T FIND YOUR ANSWER? CLICK HERE TO CONTACT SUPPORT
This solution was provided to you by Clear-Com via a question submitted to us by customers like you. If your question wasn’t answered, you need help or you have a recommended solution for our database, please send us an email at support@clearcom.com
The information on this page is owned by Clear-Com and constitutes Clear-Com’s confidential and proprietary information, may be used solely for purposes related to the furtherance of Clear-Com’ business and shall not be disclosed, distributed, copied or disseminated without Clear-Com’s prior written consent. Click Here for Clear-Com's privacy statement.