[VoiceOps] Test Numbers

Matthew Yaklin myaklin at firstlight.net
Tue Mar 15 16:07:34 EDT 2022

In the Metaswitch explorer interface.. drill down in the CFS until you get to "Test Call Services".

I see test line 100 and 102 which is what I think you want.


-----Original Message-----
From: VoiceOps <voiceops-bounces at voiceops.org> On Behalf Of Jay Hennigan
Sent: Tuesday, March 15, 2022 2:35 PM
To: voiceops at voiceops.org
Subject: Re: [VoiceOps] Test Numbers

On 3/15/22 06:51, Mike Hammett wrote:
> Our test equipment vendor (Exfo) has asked us about these 
> capabilities, "milliwatt tone, quiet termination, or silent 
> switchman." I don't know that I've seen the ability to configure those anywhere.
> How would I go about setting that up? I'm assuming that requires that 
> my switch (Metaswitch) and endpoints (Zhone, Grandstream, Calix, 
> Occam, and
> Innomedia) support them as well. I'm sure I can get platform-specific 
> details from each of the vendors, but I'd like gain a bit of knowledge 
> on that whole process before delving into vendor details.

The test numbers are a function of the switch. The endpoints need no configuration or support. To the endpoints, the test numbers are simply a dialable phone number like any other.

If Metaswitch doesn't have configurable options for milliwatt and silent termination, an Asterisk or similar box can easily do so. This is very lightweight and can run on a Raspberry Pi if needed.

The milliwatt is used to test for line loss and level and silent termination for hybrid balance.

Essentially these are dialable numbers that in the first case answer with a 1004 Hz tone sent at a level of one milliwatt and in the second answer with silence matching the line impedance with return loss as high as possible.

Jay Hennigan - jay at west.net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV
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