It happens that today I am in the Miami Beach area. As I look overhead I half expect to see a flock of pigs flying past. At least that's what comes to mind when I see TMC's Tom Keating reporting…
Doug Mohney, Editor of HD Voice News is quite plain in saying that he Hates The Term “HD Audio!” In this case his comment stems from the fact that VTech, a Canadian manufacturer of consumer cordless telephones, has started to use the term “HD Audio” describe some of their latest hardware.
The company describes the “HD Audio” feature as follows:
“The frequency band has been extended allowing for the signal to be reproduced and tuned for a fuller and clearer sound.”
In addition, they seem to have implemented a kind of tone control with several preset contours.
“The equalizer feature on the handset enables you to change the audio quality of the handset to best suit your hearing. While on a call or intercom call, or listening to a message or announcement, press EQ to select the equalizer setting Treble 1, Treble 2, Bass or Natural (the default setting) for the handset. The current setting is displayed on the handset briefly.”
Since these are DECT 6.0 devices it’s possible that the cordless aspects of the system use G.722 encoded audio to provide higher quality sound for calls between handsets. However, since the device offers only the analog PSTN interface to the world it’s going to be limited to narrowband G.711 for all calls to the PSTN. The intercom function may be improved, but it’ll have limited impact upon most of the things that people do with a telephone.
Introduced in early 2009, the Gigaset SL78H is the top-of-the-line cordless handset that they offer in North America.
Like the C59H and S79H, the SL78H is only being offered as an expansion handset with respect to the IP-capable A580IP and S675IP systems. You may see it offered as part of the SL780 or SL785, but these are not IP-capable systems.
As I’ve moved up the product range there has been a natural progression in features and physical attributes. Each better model builds logically upon the previous, but adds certain improvements in hardware or software.
At the top of the range the SL78H is physically a very different device. To start, it’s heavy. Unlike the prior models there is a lot of metal in the SL78H. Even the keypad itself has a brushed-metallic finish.
The S79H has actually become my favorite of the five Gigaset handsets that I’ve tried. My challenge now is to describe how it came to earn that honor.
Like the C59H, the S79H is only being offered in North America as an expansion handset. It can be used in conjunction with any existing A580IP or S675IP system.
Since there are already some good reviews of the S675IP available online I’m not going to go into great length describing it here. However, I will highlight the differences between it and it’s siblings in the Gigaset range.
To start I recommend you read the review offered by Alan Lord at The Open Sourcer.com. In his review Mr. Lord details his use of the S685IP with an Asterisk system. His review has been online for a while and collected a long comment trail with a lot of good information.
Newly offered for 2010 the C59H is a significant step up from the A58H described previously. Listing for just $10 more than the A58H, I suspect that many people will find the C59H worth the added cost.
With respect to the A580IP and S675IP the C59H is being offered only as an optional expansion handset. You must have one of the two IP capable systems, then you can add the C59H if desired.
Within the Gigaset SIP/DECT product range the IP enabled base systems are clearly indicated with an “IP” model designation. You may also see Gigaset offering a model C590, if not in the US at least in other parts of the world. The C590 is a complete system comprised of a DECT base and one C59H handset. However, the DECT base in question is not IP capable. It does not have a network connector, only the analog line interface.