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bearer bandwidth limit (BBL)
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Maximum bandwidth available for voice traffic on an interface when dynamic
call admission control is configured on the interface. See also dynamic
call admission control (DCAC).
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call admission control (CAC)
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A method of limiting voice traffic over a particular link in a network.
See also dynamic call admission control (DCAC).
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centralized automatic message accounting (CAMA)
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Recording of toll calls at a central point.
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direct inward dialing (DID)
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Feature of a trunk that allows incoming calls to be routed directly
to selected stations without help from an attendant.
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direct outward dialing (DOD)
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Feature of a trunk that allows outgoing calls to be routed directly
without help from an attendant.
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direct inward and outward dialing (DIOD)
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Feature of a trunk that allows both incoming and outgoing calls to be
routed directly without help from an attendant. See also direct
inward dialing (DID) and direct outward dialing (DOD) .
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dynamic call admission control (DCAC)
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An application that blocks calls on a WAN interface when the bandwidth
is exhausted. See also call admission control (CAC).
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emergency transfer relay (ETR)
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Feature that provides an emergency link between the telephone connected
to the first LINE port on the TGM550 and the trunk connected to the TRUNK
port on the TGM550 if power is disconnected from Services Router or if
the TGM550 becomes unregistered from its Media Gateway Controller (MGC).
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IEEE 802.1p standard
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IEEE standards for a Layer 2 frame structure that supports virtual LAN
(VLAN) identification and a quality of service (QoS) mechanism.
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IEEE 802.3af standard
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IEEE standard that defines a mechanism for powering network devices
via Ethernet cable. Also known as Power over Ethernet (PoE), this standard
enables remote devices (such as VoIP phones) to operate without a separate,
external power source. See also Power over Ethernet (PoE).
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ITU H.248 standard
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International Telecommunications Union (ITU) standard for communication
between a gateway controller and a media gateway.
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ITU H.323 standard
|
International Telecommunications Union (ITU) standard for packet-based
multimedia communications over networks that do not guarantee quality of service
(QoS), such as IP networks. H323, modeled after ISDN PRI, is the standard
for voice over IP (VoIP) and conferencing.
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Media Gateway Controller (MGC)
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Avaya media server that controls the parts of the call state that pertain
to connection control for media channels in a media gateway. The MGC is the
controlling entity in an H.248 relationship.
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Power over Ethernet (PoE)
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Electrical current run to networking devices over Ethernet Category
5 or higher data cables. No extra AC power cord or outlets are needed at the
product location.
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PSTN
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Public switched telephone network. The public worldwide voice telephone
network.
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reported bearer bandwidth limit (RBBL)
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standard local survivability (SLS)
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Configurable software feature that enables a TGM550 to provide limited
Media Gateway Controller (MGC) functionality when no link is available to
a registered MGC.
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telephony gateway module (TGM)
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telephony interface module (TIM)
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time-division multiplexing (TDM)
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A form of multiplexing that divides a transmission channel into successive
time slots.
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TGM550
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Avaya Telephony Gateway Module
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TIM510
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Avaya DS1 Telephony Interface Module
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TIM514
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Avaya Analog Telephony Interface Module
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TIM521
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Avaya BRI Telephony Interface Module
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