Author Archives: colin

Custom ring tones on the GXP 1450 / 2100

Previous models of Grandstream IP phones (namely GXP 1200 / 2000 / 2010 & 2020) allowed Asterisk to select which ring tone to use by sending the Alert-Info SIP Header. This was done from the Asterisk dialplan using the SIPAddHeader … Continue reading

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*CS: An Asterisk Call Server for business

Since 2006, DMC have been providing Asterisk based telephone systems to businesses of all shapes and sizes across the United Kingdom and European Union. Over the last 2 years, we have developed *CS, a complete business telephone system that comprises … Continue reading

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DMC enters the Blogosphere

Since 2006, DMC have been providing open source communications solutions to businesses across the UK and Europe and pioneering VoIP telephony so we have always been at the leading edge of technology. One thing that we didn’t get round to, … Continue reading

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