Graves On SOHO Technology

Last week I received a question via email from reader Marshall Wilgard. It seems that he is having trouble with a Grandstream BT-200 desk phone.

For five years, I used a Grandstream BT-200 IP phone without any problems.  Six weeks ago, a loud hum appeared on the phone as soon as I picked up the handset.  About 10 days later, the hum vanished, for no apparent reason.  However, about 10 days after that, the hum came back, for no apparent reason.  Despite my rebooting the phone three times, the hum remained.  Then approximately 10 days after the hum returned, it vanished again, for no apparent reason.  My phone has had the latest firmware for more than a year, and my VoIP provider says the problem is not with it.

Hum like Marshal describes is usually an analog phenomenon, not something that I’d associate with firmware. It sounds to me like a problem with the hardware. Issues of hum tend to revolve around a problem with the power supply. Given the age of this phone I’d guess that most likely some kind of capacitor is failing.

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This week saw an announcement about the release of Ekiga v4.0. This is the most significant release of the venerable open source soft phone in some time. It brings with it many improvements.

I’m especially interested in the following new capabilities:

• New audio codecs: SILK (used by skype), G.722.1 (aka Siren 7), G.722.2 (aka GSM-AMR Wide band)
• Video codecs changes: H.264 optimizations
• Added RTP TOS support
• Support for DNS SRV caching

While developed primarily on Linux Ekiga has long supported multiple platforms. I took a short while today to try the new release on an older Windows XP laptop. The Windows installer also installed the GTK libraries necessary to support the application. Installation was quick and painless.

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At long last I’ve purchased a Polycom VVX-500 for my desk. A year ago I participated in the beta program for this outstanding desk phone. A such I’ve had one to use well before they launched in October 2011.

However, Polycom devices involved in a beta program ship with a boot loader that will only load beta firmware. Once the device was officially shipping and release firmware available I could not longer update the VVX in my possession. This wasn’t initially an issue, but when OnSIP started to support Polycom UC v4.0+ firmware with their provisioning server I thought it would be good to more completely integrate my desk phone with our OnSIP account.

I might like to review the VVX-500, but that seems a little weird. As I was involved in the beta program I was bound by the companies standard non-disclosure agreement during the period of the beta. Once the device launched various other people reviewed it. I’m not sure that it’s worth my time to commit to a full length review, but there are some items worth noting about the VVX-500. I can certainly point these out from time to time.

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In recent weeks there has been a long running thread over at the DSL Reports VoIP forum. It revolves around differences in the menus on the handsets the ship as part of a Gigaset C610A IP SIP/DECT phone system vs C610H expansion handset.

The menus on the handset show or hide certain options depending upon how the handset was intended to be delivered. It might deliver as part of a C610A IP system, in which case the menu option to “Select Services” is shown. The handset may be configured to deliver as part of a Gigaset C610A-L410 combination. Since that system is not IP-capable the “Select Services” menu is not shown on the handset.

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Invoxia’s NVX 610, which I reviewed not long ago, is an ambitious device, tackling various communication and entertainment functions all by way of an iOS host. With the NVX 610 selling for $599, it’s many capabilities come at a price.

Earlier this week Invoxia announced that they have started to deliver their new AudiOffice device. Announced at CES earlier this year, AudiOffice looks nearly identical to the NVX 610. The device is more targeted in its feature set, acting as a hardware dock for the purposes of desktop telephony applications.

Like the NVX, AudiOffice supports cellular calls, one SIP account and one Skype account. HDVoice support remains in the form of G.722 via SIP and SILK with respect to Skype calls. Compared to it’s larger sibling AudiOffice has fewer microphone (2 vs 8) and speaker (4 vs 8) elements.

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Invoxia’s NVX 610 is a curious device. In some ways it defies description. Is it an iPhone/iPad dock? Is it a desk phone? Or is it a conference phone?

In truth, it’s all of these things. The question is, can it very good at all those functions? Or any of them?

These questions are what prompted me approach Invoxia for an evaluation unit. This review arises from the my experience with that device over the past eight months.

Let’s begin by considering a little bit about the company. Invoxia are a French company with strength in design and engineering. Amongst their team you will find considerable experience in telecom. In the past they have been involved in projects for BT and the French multi-national Thomson, including the SIP/DECT hardware that Comcast rolled out as part of its HomePoint offering.

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