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<TITLE>Asterisk -> Mobile Phone quality issues</TITLE>
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<FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>Hi,<BR>
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I’d like to know if some of you are experiencing the same problem when calling cell phones using ISDN networks ?<BR>
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Here is what I have:<BR>
Asterisk running on Linux<BR>
Polycom IP 301 SIP Phones<BR>
one 4 ports analog card (no quality issue when dialing from this card)<BR>
one Wildcard TE210P configured to use E1 (clock is provided by my telco)<BR>
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Parameters: I put highest quality where ever it was possible (including on the phones)<BR>
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All this is connected to a VMUX 2100 (RAD) compressing voice to 6.4k and sent to my Telco where I have a PRI ISDN and then calls go where they have to.<BR>
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When dialing fix phones: no problem reported. Voice is very good and stable.<BR>
When dialing cell phones: voice can be pretty strange and in 99,9% of the case we have a clear hearing of the other party (the one using the cell phone), but the guy on the other side as blank in words, voice becoming robot like and other strange things. Should it happen from time to time I would have consider this as a cell phone network issue, but I have this on all calls...<BR>
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Somebody has an idea ?<BR>
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Thx,<BR>
SP</SPAN></FONT>
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