[VoiceOps] analog pulse dialing solutions

Carlos Alvarez carlos at televolve.com
Wed Dec 9 12:49:18 EST 2009

We have a few customers doing alarm and credit card over plain old ulaw, 
and a few doing fax.  This works well on the connections where we 
control the QoS, such as our local Wi-MAX provider (<3ms latency 
anywhere in the city).  On generic connections, fax is mostly unusable 
and the alarm/card machines get around a 5-10% call failure rate.

On 12/9/09 10:29 AM, Lee Riemer wrote:
> I've had success using dial-up internet over a voip connection.  Latency
> was 400+ms to the gateway. I wouldn't recommend it as a pleasurable
> experience, but it worked.
> On 12/9/2009 11:14 AM, Carlos Alcantar wrote:
>> On another note have you do you know if the alarm modem will work over
>> voip? With my experience fax works with t.38 normal modem calls not so
>> well. Hit and miss.

Carlos Alvarez

Advanced phone services simplified

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