[Asterisk-Users] Grandstream HT486 and FAX

[Steve Underwood]

Hi Ronald,

G.729 will not carry FAX. G.711 will, but over IP it still tends to be 
flaky. Reliable FAX over IP requires T.38.

Steve


Ronald Ramos wrote:

>Hi All,
>
>I was trying to test to send a fax to an international number.
>Here's the setup:
>
>FAX --> HT486 --> SIP PROXY --> GATEWAY --> PSTN --> FAX
>
>Unfortunately I haven't been able to do it, I read somewhere that fax uses
>G711  only, is this true? because our gateway provider uses only G729. does
>this mean I can't send fax via that gateway, because of the codec?
>
>So can i do this then,
>
>FAX --> HT486 --> SIP PROXY --> HT486 --> FAX
>
>i'll use G711 on both HT486.
>
>Hope anyone can help me. Thanks in advanced.
>  
>