Skip to content

{ Category Archives } Telephony

The Amp Hours confusion

When it comes to batteries, the energy capacity is often given as Amp-Hours. For smaller batteries like those used in portable devices, this often shows up as milliamp-hours. This can be misleading because a proper measure of energy needs volts as well as amps over time. An example is the auxiliary batteries available for charging […]

Tracfone meets Android

Back then, Tracfone provided a pre-paid access to the common cell networks. The tickets were based on calendar days and cell network minutes so you could choose what best suited your needs. This worked well for those who needed inexpensive cell phone service and weren’t on the phones all the time. Text messaging and data […]

Disruptive Technologies: Cell phones

At Strategy Page: Information Warfare: One Technology That Changed Everything. It is about the impact of the cell phone, especially in the mid-East and Africa. “Cell phones have revolutionized life and culture in poor countries. … Cell phone networks were cheaper to set up and in poor countries the governments generally let foreign operators come […]

Primer on digital voice

Southgate provides a Video of Codec2 presentation. It is a presentation (40+ minutes) by David Rowe, VK5DGR at the linux.conf.au in Ballarat, January 16-20 2013. “Codec2 is an open source low bit rate speech codec designed for communications quality speech at around 2400 bit/s. Applications include low bandwidth HF/VHF digital radio and VOIP trunking. Codec […]

Samsung S390G via Tracfone

As a means to reduce telephony costs, I recently bought a refurbished Samsung s390G from Tracfone. The cost was the same as the 60 minute card that came with it. Since the phone is a ‘triple minutes for life’ and there was a sign-up bonus, the $20 paid for 200 minutes or 150 days of […]

Tagged