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Re: Re: looking for telephone interface 'input'
To: CRTech <crtech@crtech.org>
Subject: Re: Re: looking for telephone interface 'input'
From: Pat Wahl <pwahl@wwib.com>
Date: Sat, 22 Sep 2018 16:24:37 -0500
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In-reply-to: <482376197.332725.1537645201937@myemail.cox.net>
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That's a great way to run your POTS lines. Great design by Telos too (as usual). We'll probably keep a single POTS line for back-up, and for our Comrex Hotline and Tieline to use when POTS is the only path. We've never used a "system" from Telos, but we sure have loved their One and HX hybrids. 

It is enough of a topic for its own thread, but we're being enticed toward SIP for the cost savings and the potential audio quality benefits (including G.722 -7kHz audio bandwidth on calls so originated). I don't expect POTS to be shut down anytime soon, but for us here, it is being eliminated by the economics of $70+ monthly line charges (not including long-distance).

Even our telemetry at transmitter and translator sites is going toward all IP at this stage, and I am not setting up any new POTS equipment for this. The old Burk/Gentner '2500' gear is hangin' in there, though we mostly access these via IP now.

We remain unconverted in the studio. On-air consoles are AES, and production is Allen & Heath sweet analog ;-). But, the Wheaties and Axia guys are always grinning at us from their booths at the shows. They know their day is coming. Assimilation to IP will one day be complete throughout the galaxy...


On Sat, Sep 22, 2018 at 2:40 PM, Mike Shane <somethingorother@cox.net> wrote:

If you have the option of staying with POTS lines, the Telos 1X6 is great. It has loop-thru for all six lines so you can share lines for multiple uses.

i set up 4 lines as Harvey describes. All lines go to the Telos, then loop back out for other uses. These can be whatever you want: office use, fax, other POTS equipment such as Comrex Hotlines, computer telco modems, etc.

if the Studio picks up a line first (on the 1X6), the line is removed from the loop-thru and just appears dead to anything downline. If a downline device picks up the line first, the 1X6 senses this and steadily lights an indicator so you can see that in the studio, and also locks out the line buttons for that line until it is free again so you don’t interrupt what’s going on with that line.

in my application, I have two rollover lines routed to the 1X6, then each to one of two Comrex Hotlines (set to either not answer or to answer only after 6 rings) using the Tel Line jack, then from the Tel Set jack to a production room phone tied to a separate Telos One. Before heading to the production room, one line also went to a computer modem, via the modem’s Line jack, with the Set jack connected to production. 

One line can have up to four applications in this kind of setup (and more if you want). Any device downstream of the Telos 1x6 that picks up a line locks out all the downstream devices by disconnection, and the upstream 1X6 locks itself out. If the 3rd to last device in the chain is on the line, upstream devices looking for an incoming call, other than the 1x6, are locked out by virtue of the line being busy. The 1x6 locks itself out and can’t make an outgoing call, either.

Later Telos devices do not offer this handy loop thru option.

Mike Shane in Omaha

On September 22, 2018 at 1:56 AM "Harvey T. Twite" <harveytmedia@gmail.com> wrote:

The engineer set up the phone lines to the Telos firs...so if the studio answered, no one could access the line. Plus..telos uses modular jacks..you can wire them on a punch block....

Harvey T. Twite
President - General Manager
Radio Ruidoso - KEDU Radio 102.3 FM
Network New Mexico
Producer/Host - Congressional Rev
Producer/Host - ESGR Radio

Harvey T. Media
1703 Sudderth Drive, #562
Ruidoso, NM 88345
Studios (575) 258-1386
Cell (575) 973-0232
Fax (575) 215-1009
Website: www.kedu.us

On Fri, Sep 21, 2018 at 11:03 PM Pat Wahl < pwahl@wwib.com> wrote:
I need to outfit six studios, two of which have multiple phones (guest/callers) for talk programming. Our current (1986) KSU phone system is analog and shared between offices and studios by custom tweaking the KSU to Set audio pairs to work with Telos One and HX digital hybrids. Since the early digital office phone systems did not offer "soft-phones," the only options were a technically inferior tap of the audio at the handset or a kludgy transfer of the call to a POTS hardware emulation.

Now, I'm told "soft-phones" from Mitel or Vonage can run on a PC and simply (a) pass the caller audio bitstream out of a sound card to the console, and (b) receive the console mix-minus through the sound card and into the outgoing bitstream. If it is that simple, and there's no hybrid needed in the interface, then what is the Telos or Comrex product doing other than audio-processing? You see, I don't get to use Telos or Comrex for the office system, and I don't really want to bridge two PBX systems, but they want our phone lines to be shared by offices and studios. So, I'm wondering what I can do with soft-phones in the studios and perhaps some caller voice-processing. Is this unworkable, untried, routine & simple, or on the wrong track to start with … ???


On Thu, Sep 20, 2018 at 1:02 PM Pat Wahl < pwahl@wwib.com> wrote:
I'm curious about SIP phones. Traditional POTS has the caller and send audio shared on a copper pair. Interface to a console requires a complicated hybrid. With SIP, isn't the transport of caller audio and send audio separate? If so, what's the need for a hybrid? Is there (shouldn't there be) an appliance or a 'software defined' phone for PC (using PC sound hardware) that would easily interface to a console's input and mix-minus? 

I know little to nothing, but I'm being plunged into this new world.

Pat Wahl
Chippewa Falls, WI
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References: looking for telephone interface 'input'
(Pat Wahl <pwahl@wwib.com>, 20 Sep 2018 18:03:06 -0000)
Re: looking for telephone interface 'input'
(Pat Wahl <pwahl@wwib.com>, 22 Sep 2018 05:03:33 -0000)
Re: Re: looking for telephone interface 'input'
("Harvey T. Twite" <harveytmedia@gmail.com>, 22 Sep 2018 05:55:12 -0000)
Re: Re: looking for telephone interface 'input'
(Mike Shane <somethingorother@cox.net>, 22 Sep 2018 19:40:13 -0000)
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