[Dundi] DUNDi Max retries exceeded to host

[jorhardware]

Hello

dundi not have a complete connections, the link is my free, anything from
10 to 20 ms between a host and another, as I searched on google and wiki,
but do not think the solution, they know they can be the log below?

asterisk version
Asterisk 1.6.2.21

dundi lookup 1000 at priv


[Jun 22 01:50:15] NOTICE[23747]: pbx_dundi.c:3049 dundi_rexmit: Max retries
exceeded to host 'x.x.x.x:4520' msg 0 on call 712
[Jun 22 01:50:15] NOTICE[23747]: pbx_dundi.c:3049 dundi_rexmit: Max retries
exceeded to host 'z.z.z.z:4520' msg 0 on call 2050
[Jun 22 01:50:15] NOTICE[23747]: pbx_dundi.c:3049 dundi_rexmit: Max retries
exceeded to host 'a.a.a.a:4520' msg 0 on call 19980
[Jun 22 01:50:15] NOTICE[23747]: pbx_dundi.c:3049 dundi_rexmit: Max retries
exceeded to host 'w.w.w.w:4520' msg 0 on call 26069
[Jun 22 01:50:15] NOTICE[23747]: pbx_dundi.c:3049 dundi_rexmit: Max retries
exceeded to host 'b.b.b.b:4520' msg 0 on call 23207
[Jun 22 01:50:15] NOTICE[23747]: pbx_dundi.c:3049 dundi_rexmit: Max retries
exceeded to host 'c.c.c.c:4520' msg 0 on call 12231
[Jun 22 01:50:15] NOTICE[23747]: pbx_dundi.c:3049 dundi_rexmit: Max retries
exceeded to host 'd.d.d.d:4520' msg 0 on call 9641


thank you
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