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Telephony

E1

November 3, 2010

E1 E1 is an ITU-T standard that defines the basic protocol and structure for transmission of TDM data over a physical circuit (most often the physical connections use twisted pairs and conform to G.703). It is widely used in Europe. An E1 primary rate trunk has a total of 32 time slots allocated within each frame of data. […]

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TDM

November 3, 2010

TDM Stands for: Time Division Multiplexed This is one method by which multiple streams of data are combined together into a single stream of data for transmission down a cable or optical fibre. The combined streams may then be separated out again into individual streams at the far end of the cable as required. When […]

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How can an Asterisk IP-PBX benefit my business?

August 23, 2009

In a Nutshell: The benefits of upgrading to an Asterisk based IP-PBX

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What is DISA and how is it relevant to SLA?

January 12, 2009

What is DISA? DISA (Direct Inward System Access) is a mechanism available on some PBX’s that permits inbound calls to be answered and immediately presented with system dial tone. The caller is then able to dial a number that the PBX uses to decide how to forward the call. It is like the caller is […]

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VoIP Gateways Explained

February 14, 2008

Basic Function of a VoIP Gateway A VoIP gateway provides the interface between the IP telephony network and the conventional public switched telephone network (PSTN). For example, a gateway can be used to link a VoIP call to a PRI-30 ISDN trunk, a BRI two channel ISDN circuit or an analogue line. In fact, a […]

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