Hello Guys,
What is the reason for this Error Code :571 in KX-NS500
"The new call was rejected because the DSP was full .A large DSP or a large PBX with a large DSP is recommended."
It obviously means that at some moment PBX doesn't have enough resources of digital signalling processor (DSP) card and, by that reason, can't handle another call, that needs such resources.
Check DSP resources utilization at PBX Configuration -> 1. Configuration -> 5. DSP -> 2. Usage
Probably you should to replace you DSP-card with more powerful one.
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