WAV: 38 seconds of modem negotiate and chatter
Why? you may ask. Well years ago, not having any copper phone lines in the house, I set up a sipura as an analogue phone line for the Sky boxes. After much tinkering it would work maybe 1 on 5 times to phone home. This was just about good enough as it would keep trying until it got through.
|Modem sync with old SPA112 firmware|
Now, having changed IPs at home since, and forgetting the password, and so on, I decided that rather than try and work out how to reset the old sipura I would buy a new one. An SPA112, 2 port TA. They are branded cisco now, and I am not entirely sure about having a cisco of any sort anywhere near my network, but it is useful.
Obviously, technically, they are A&A equipment as A&A, as a teclo, are providing an analogue phone line to me using this equipment, and I am connecting that to my Sky boxes.
The main reason for looking at this at all is that I am getting some of the sky boxes upgraded, and the engineers try and get them to phone home as part of the install, as I recall. So a 1 in 5 pot luck was not going to be ideal.
The new SPA112 worked about as well, after I set it up without echo cancellation, a-law only, no fax detect, no jitter adjust (set to high), UK line impedance, zero gain, etc.
So I was a tad disappointed, but it would have to do.
Then, just for the hell of it, I upgraded the firmware. The version that came with it was Oct 2010. New code is July 2013!
To my surprise the sky boxes now seem to work first time every time. They negotiate differently too. Before it sounded like a conventional modem sync as you might get for 33k or lower. Now, and correct me if I am wrong, but the WAV included here sounds more like the 56k style negotiation. I can only assume some changes in the firmware have improved the operation somewhat. Obviously there is no reason why it should not work - what I am doing is the same as what is done in the telephone exchange but with a much shorter wire involved.
|Modem sync using new SPA112 firmware|
Of course, what they should be doing these days, is ask for the boxes to be on one LAN, now they have, and use, network ports. They can then phone home via the Internet and check other boxes at a MAC/Ethernet level. It is crazy that modems are still in use. Even so, not a sound I have heard in a long time.