No dial tone on FXS module connectors

The problem is simply that the FXS port stopped working - in the form of no longer providing a dial tone. As I have said and as you can see from logs and settings both FXS ports are configured the same. Asterisk says it's working, just no tone. And the situation is that one port has tone and one doesn't. The one that doesn't work was working with the current configuration, and suddenly stopped having a dial tone on it.

My though is that something on the FXS board stopped working, ala no dialtone. Is it possible for a FXS board to fail in such a way?

hello, plindguist:
i am not sure what happened with the FXS, but i never see such case happened. maybe, you can try to take it out and plug in to other slot on the mother board.
regards!
james.zhu

Changed it and same thing in another slot. Moved it back.

Ran fxstest on the 2 FXS ports I have. The stats report the same things, the regdump looks similar - but I don't know what it means, on the working one playing tones work, on the non-working one no tones are played (rather I can't hear anything). Don't know if this may help you, but here is the output:

Offhook:
[root@asterisk zaptel-1.2.20.1]# ./fxstest /dev/zap/11 stats
TIP: -6.7680 Volts
RING: -16.1680 Volts
VBAT: -24.8160 Volts

Onhook
[root@asterisk zaptel-1.2.20.1]# ./fxstest /dev/zap/11 stats
TIP: -5.6400 Volts
RING: -54.1440 Volts
VBAT: -63.9200 Volts

[root@asterisk zaptel-1.2.20.1]# ./fxstest /dev/zap/11 regdump
Direct registers:
0. 05 1. 28 2. 88 3. 00 4. 88 5. 00 6. 00 7. 00
8. 00 9. 00 10. 08 11. 33 12. 80 13. 10 14. 00 15. 00
16. 00 17. 00 18. 00 19. 00 20. 00 21. 00 22. 00 23. 00
24. 00 25. f4 26. 02 27. 00 28. 07 29. f2 30. 68 31. 00
32. 00 33. 00 34. 00 35. 00 36. 00 37. 00 38. 00 39. 00
40. 00 41. 00 42. 00 43. 00 44. 00 45. 00 46. 00 47. 00
48. 00 49. 00 50. 00 51. 00 52. 00 53. 00 54. 00 55. 00
56. 00 57. 00 58. 00 59. 00 60. 00 61. 00 62. 00 63. 54
64. 11 65. 61 66. 01 67. 17 68. 04 69. 0a 70. 0a 71. 00
72. 20 73. 04 74. 32 75. 10 76. 00 77. 00 78. 20 79. 00
80. 0f 81. 90 82. aa 83. aa 84. 00 85. 00 86. 00 87. 00
88. 06 89. 03 90. 00 91. 00 92. ff 93. 19 94. 10 95. 01
96. 00 97. 00 98. 0f 99. 0e 100. 11 101. 0e 102. 05 103. 26
104. 05 105. 29 106. 06 107. 08 108. eb

Indirect registers:
0. 55c2 1. 51e6 2. 4b85 3. 4937 4. 3333 5. 0202
6. 0202 7. 0198 8. 0198 9. 0611 10. 0202 11. 00e5
12. 0a1c 13. 7b30 14. 0063 15. 0000 16. 7870 17. 007d
18. 0000 19. 0000 20. 7ef0 21. 0160 22. 0000 23. 2000
24. 2000 25. 0000 26. 2000 27. 4000 28. 1000 29. 3600
30. 1000 31. 0200 32. 07c0 33. 2600 34. 1b80 35. 8000
36. 0320 37. 008c 38. 0100 39. 0010 40. 0c00 41. 0c00
42. 1000 43. 1000 44. 0000 45. 0000 46. 1bb0 47. 9160
48. 3990 49. 2bd0 50. 1cc0 51. 0bd0 52. d6b0 53. bf80
54. a8d0 55. 94a0 56. 6d40 57. 6940 58. 6460 59. 5e90
60. 0001 61. 8000 62. 0000 63. 0000 64. 0000 65. 0000
66. 0000 67. 0000 68. 0000 69. 0000 70. 0000 71. 0000
72. ffff 73. ffff 74. fffc 75. 0001 76. fffd 77. ffff
78. 0000 79. 0005 80. 0000 81. 0000 82. 0001 83. ffff
84. fffd 85. fffe 86. 0001 87. 0001 88. 0007 89. 0007
90. 0003 91. 0013 92. 007f 93. 00c0 94. 00c0 95. 00c0
96. 0105 97. 0250 98. fd98 99. f746 100. fb05 101. 7eba
102. c63b 103. c824 104. f207

Hello, plindquist:
Could you try to connect with other power supply? the result you posted should be no problem. if it still can not work, you can contact with the person who you bought from.
regards!
james.zhu

I think the fxs module is broken. please send it back.