I have the above error after my first outgoing call which is delivered fine.
Then I have to press “Apply” on web menu “FXO Port” to make another call.
On asterisk it seems that pstn line is busy.
My country is Greece and my setting are :
Product Model: HT-503 V2.0A
Software Version: Program – 220.127.116.11 Bootloader – 18.104.22.168 Core – 22.214.171.124 Base – 126.96.36.199
Extra – 188.8.131.52 CPE – 0.0.1.97
System Up Time: 17:47:39 up 5:40
PPPoE Link Up: Disabled
NAT: Unknown NAT
Port Hook User ID Registration
FXS On Hook 500 Not Registered
FXO Idle pstn1 Registered
Thanks for your consideration