Monthly Archives: May 2011

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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