ArtDio IPE 1000 - Manual (Page 2)

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Terminology
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FXS interface: A Foreign Exchange Station (FXS) interface is used to connects to a standard telephone, fax
machine, trunk side of PBX, or to other FXO interfaces. It will supply ring, voltage, and dial tone. So it is very
important not to connect the FXS interface to the wrong device that are not listed above, it will damage the
voice gateway or the voice gateway will damage the device on the other end.
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FXO interface: A Foreign Exchange Office (FXS) interface is used to make a connection to be directed at the
PSTN central office or to a analog PBX extension line. It will supply hook off, hook on and flash signal that act
like a standard analog phone. On the contrary with FXS interface, FXO do not have line power on it.
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Access Code: A user defined string of digits, stands for access different voice path, call control or to activate
special function for making a call. For example, users can define the access code to make a transit call, a
circuit connect call or a MGCP call.
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Soft Key: A string of digits defined for each channel, that this soft key will be send out or activated while detect
the pre-defined trigger events for this channel. Soft key can alos be activated with a pre-defined access code.
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Circuit Connect: A special function provide by PBX gateway, while applying this function the channel from
caller to the channel of called party is connected as if there was a real circuit line between. After the
connection is made, all the number user dial will be send to the other side transparently.
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MGCP: MGCP (Media Gateway Control Protocol) is a protocol for the call control of Voice over packet
networks by out-of-band call-control elements known as media gateway controllers (MGCs) or call agents
(CAs). It is described in the IETF RFC2705.
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FXO Outgoing Prefix: A prefix (numbers that can allow pause key) that will be send out from FXO interfaces
before any number. This is used while voice gateways are connected to PBX extension lines with FXO
interfaces.
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T.38 Fax Relay: T.38 fax relay is a ITU standard that allow fax being transmitted over IP service network. Differ
from T.37 store and forward fax relay that T.38 is defined for real time fax transmission.