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Saturday, June 23, 2007


To my Fellow (Filipino's) and the People Around the World, who need to configure their ATA. See below settings.

Step 1 Upgrade the ATA firmware to the latest version

Step 2 Ensure that you have enough bandwidth for uplink and downlink.

•For G.711 fallback, it is recommend to have ~100Kbps. (PAP2T)

•For T.38, allocate at least 50 kbps. (SPA2102)

Step 3 To optimize G.711 fallback fax completion rates, use the following settings on the
Line tab of the Linksys ATA:

•Network Jitter Buffer: very high

•Jitter buffer adjustment: disable

•Call Waiting: no

•3 Way Calling: no

•Echo Canceller: no

•Silence suppression: no

•Preferred Codec: G.711

•Use pref. codec only: yes

Step 4 If you are using a Cisco media gateway for PSTN termination, disable T.38 (fax relay) and enable fax using modem passthrough.

For example:

modem passthrough NSE payload-type 110 codec g711ulaw

fax rate disable

fax protocol pass-through g711ulaw

Step 5 Enable T.38 fax / Passthru_Method on the PAP 2T by configuring the following parameter on the Line tab for the FXS port to which the FAX machine is connected:

FAX_Passthru_Method: ReINVITE (for PAP2T while in SPA2102 = NSE)

Note If a T.38 call cannot be set-up, then the call should automatically revert to G.711 fallback.
Asterisk or any VOIP proxy server applicable but Need changes and updates in asterisk for you able to use FOIP.

I hope this information will help you to configure the ATA device.



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