Subj : Re: voip -> ata -> 56k modem
To   : all
From : bbsing
Date : Tue Sep 03 2024 14:58:35

ply the settings below. They will tell the ATA not
to try to "help" and should cause it to just pass through audio unmodified.

 1. After applying the settings to Line 1 and hitting Submit, make sure you
wait for the page to reload before moving on to Line 2.

3. In the Network Settings section:
 o Network Jitter Level: Extremely high
 o Jitter Buffer Adjustment: No 4. In the Audio Configuration section:
 o Preferred Codec: g711u
 o Second and Third Preferred Codec: Unspecified
 o G729a Enable: No
 o Silence Supp Enable: No
 o Echo Canc Enable: No o Everything that says Fax: No
 o Modem Line: Yes

3. If you're not getting any dialtone, check that the SPA has an active
Ethernet link on the blue port. If it doesn't have a connection and a valid IP,
it'll shut off the voice module.

 4. You will not get a 56k connection speed no matter what you do - the V.90
and V.92 specifications explicitly state that the modems you have ("analog
modems") are only capable of originating a 33.6 connection.  You need special
ISP equipment to originate a 56k connection.

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modem? 
 Wa>  GW> 
 Wa>  GW> I'm trying to get my own USR 56k to connect over VOIP through my cisc
 Wa>  GW> sp122 ata, but no handshake completes. 
 Wa> 
 Wa> Hi Grant,
 Wa> 
 Wa> I don't have this setup anymore, but I was using a StarTech ICUSB232 USB
 Wa> to Serial adapter plugged into a USR Sportster 56k modem.  For the phone
 Wa> line I was using a Cisco SPA112 provisioned with service from voip.ms.
 Wa> 
 Wa> I remember there were a couple of settings I needed to change on the
 Wa> SPA112, making sure the firmware was updated (1.4.1 SR5) and some
 Wa> changes under audio configuration to get it to connect at all.
 Wa> 
 Wa> I believe I used the settings from this page:
 Wa> https://gekk.info/articles/ata-config.html#Troubleshooting
 Wa> 
 Wa> Troubleshooting Section 2 are the settings you're after.
 Wa> 
 Wa> 
 Wa> Jay
 Wa> 

Thanks Jay, 

The link you sent provided

.