ID Asterisk

[HELP] app_dial.c:1546 wait_for_answer: Unable to write frametype: 2

Dear Mastah-mastah sekalian, boleh tolong infonya ada apa dengan ini ??
ini selalu muncul di log asterisk, dan telepon kadang suka mati sendri atau gagal telepon, tolong bantuannya mastah.

[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2
[2020-05-08 13:11:24] WARNING[8078][C-00000065]: app_dial.c:1546 wait_for_answer: Unable to write frametype: 2

coba disallow semua codec dan allow cuma codec ulaw&alaw.