> For the complete documentation index, see [llms.txt](https://cookbook.denovolab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cookbook.denovolab.com/troubleshooting/change-q850-in-4xx-5xx.md).

# Change Q850 in 4xx/5xx

Please find a file sip\_response\_to\_q850.conf in the directory: /opt/denovo\_v6/dnl\_softswitch/conf/sip\_response\_to\_q850.conf

```
sip_response,QSIG
200,16
400,41
401,21
402,21
403,21
404,1
405,63
406,79
407,21
408,102
410,22
413,127
414,127
415,79
416,127
420,127
421,127
423,127
428,21
438,21
480,18
481,41
482,25
483,25
484,28
485,1
486,17
487,487
488,65
500,41
501,79
502,38
503,34
504,102
505,127
513,127
600,17
603,21
604,1
606,65

```