Mitel SX-2000 EL Information Manual page 254

SX-200 General Information Guide
PRI card
The PRI (Primary Rate Interface) card provides SX-200 systems with two links of Primary Rate
Access (PRA) to the ISDN service provider.This PRI connection supports the simultaneous
transmission of voice and data. Each channel is capable of transmitting voice or data calls at
64 kbps. By interfacing the SX-200 switch with the ISDN service provider, it allows SX-200
users to access ISDN services, such as Direct Dial In (DDI), Calling Line Identification (CLID),
and Call By Call Service Selection (CBC).
PRI Gateway
The PRI Gateway is an interface that can include the ISDN Network Gateway, the PRI cards
and the Ipera 2000 interfaces.
RS-232C
A North American data interchange standard, issued by the Electronics Industries Association
(EIA). The equivalent European standard is the V.24 specification.
Recall Button
This refers to the push-button installed on certain types of industry-standard telephones, for
the purpose of providing a ground condition to the line when the button is pressed. When used
in conjunction with the SX-200 EL/ML system, pressing the Recall button corresponds to a
switch hook flash; for example, when a party is being placed on hold. The button is sometimes
referred to as the ground button.
Ring Lead
The second wire of a telephone pair, originally named because it was connected to the "ring"
of a telephone plug. The first wire (called the tip lead) was connected to the tip of the plug.
SMDR
See Station Message Detail Recording, page 241.
Second Dial Tone
A user making a trunk call through a system usually receives dial tone after the handset is
removed, and then dial tone from the CO after the trunk access code has been dialed. However,
the ARS feature of the SX-200 EL/ML system would mask the CO dial tone, because the
outpulsing sequences are isolated from the user. To prevent confusion a second dial tone can
be provided to the user by the SX-200 EL/ML system (as a programmable option) at the
appropriate point in the outpulsing sequence.
Soft Hold
See Consultation Hold, page 233.
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