Specifications

Argentina National Network Support
E1/R2 functionality on the Argentia National Network is supported. Included are both new features and
modifications to existing features as needed. Although these changes satisfy Argentina requirements, the feature
additions and enhancements are applicable for all location codes.
New Features
CALLING LINE IDENTIFICATION (CLID) provides the network with a means of identifying the
calling party. This feature is supported with three modes of operation: default number only, station number
only, or default number with station number.
Default Number
—When the installer selects the default number only, a programmable network ID is
outpulsed on the network. Typically, this is the main switchboard number for a business using the system.
Different businesses using one system are able to assign different default numbers if they use separate E1
network connections.
Station Number
—When the installer selects the station number, a programmable station ID is outpulsed on
the network. Typically, this is the extension of the station placing the call.
Default and Station Number
—When the installer selects the default and station number, the default number,
followed by the station number is outpulsed to the network. Typically the installer selects this mode when it
is necessary to send the office code for the network connection, followed by the extension of the station
placing the call.
OPEN DIGIT DIALING MODE is a protocol used on E1 lines to indicate to the network when the caller
has completed dialing. Locations which do not have a uniform dialing plan (a specific number of digits for
national directory numbers) typically use this mode. The system uses the open digit dialing mode to respond
to a request from the network for a digit while listening for directory number and CLID digits. The central
office (CO) signaling protocol determines the open digit dialing mode. The system supports three modes:
compelled, semi-compelled and pulsed.
Compelled
—In the compelled mode, the network sends an MF tone to the system to request a digit. This
tone remains on until the system responds with an appropriate tone. When the installer selects the
compelled mode, the system responds to the digit request by sending a digit, or a tone that indicates no
more digits are available. When the network receives the system’s response, it removes the request tone and
the call progresses.
Semi-Compelled
—In the semi-compelled mode, the network sends an MF tone to the system to request a
digit. The MF tone remains on until the system responds with an appropriate tone, or a network timer
expires. When the installer selects the semi-compelled mode, the system responds to the digit request by
sending a digit, or by letting the network time out if no more digits are available. When the network
receives the system’s response or times out, it removes the request tone and the call progresses.
Pulsed
—In the pulsed mode, the network sends an MF tone to the system to request a digit. It sends this
tone for a short duration and then removes it. When the installer selects the pulsed mode, the system
responds to the digit request by waiting until the tone is removed, and then sending a digit, or a tone
indicating that no more digits are available. When the network receives the response, the call progresses.
FORCE RELEASE TIME is the time period during which a network can release a line before the
communications system sets the line to an idle state. In some locations, the network requires the system to
maintain a busy state on a line when the outside party hangs up. This is to allow the network sufficient time
to prepare its resources for another call. Typically, the network sets the line to an idle state when its
resources are ready and the system responds to this action by also setting the line to an idle state. In these
locations, protocol requires the system to force the line to an idle state if the network does not set the line to
6 – 6 General Description
GCA40–215 General Description