Specifications

an idle state within a specific time period. If the network does not return the line to an idle state within the
force release time period, the system sets the line to an idle state. The network will typically respond by
setting the line to an idle state, or to an out of service state. If the network sets the line to an out of service
state, the system also sets the line to an out of service state and prevent further access to the line until the
network places the line back in service.
CO DISCONNECT RESPONSE allows the installer to select the station response to a CO disconnect on a
DID call. Typically it is desirable to have a station return to an idle condition when the system receives a
positive disconnect signal from the company this action makes the station immediately available for another
call. However, the Argentina National Network requires that a station receive an audible indication when
the outside party goes on-hook. To meet this requirement, software release 13A adds an option that allows
the installer to select the station response to a CO disconnect on a DID call. One option is to release the line
and have the station return to idle. The other option is to return the station to the intercom state and give
error tone to the station. The station continues to give error tone until it’s user places it on hook or the
intercom mode timer expires.
TRANSMIT METERING MODE allows the installer to select the type of transmit metering that is in
effect. Some locations allow both inbound (DID) calls and outbound (DOD) calls over the same line and it
is possible that metering may be required for calls in one direction and not in the other. The service provider
may require the system to transmit a metering pulse to the network on DID calls and receive a metering
pulse from the network for DOD calls.
QUIET DIALING, when enabled, mutes the receiver path while the caller dials digits to make a call.
Feature Enhancements
To support the Argentina National Network compatibility testing, software release 13A enhances several
existing features. These features include: Call Metering, Call Category, and Call Costing.
CALL METERING may be necessary for calls in one direction and not the other. This is because
some locations allow inbound (DID) and outbound (DOD) traffic on the same E1/R2 lines. The
network may need the system to transmit a meter pulse on DID calls and may need the system to
receive a meter pulse from the network on DOD calls. To prepare for this need,
•
the line programming option in the VMMI program application, presents a Receive Metering Mode
choice. This programming choice is applicable to all DOD calls on that line,
•
the DID Block Options programming option presents a Transmit Metering Mode choice. This setting
is applicable to all DID calls for lines in the DID block.
The digital communications system supports three metering modes: Answer, Clear-Back, and C-Bit; ,
however, a single network connection can only support one mode of metering. Therefore, if metering is
necessary for both DID and DOD calls, installers must select the same mode for transmit metering and
receive metering. If they choose different modes for DID and DOD calls, the receive metering (DOD) takes
precedent.
CATEGORY support for the Argentina National Network requires three additional categories. These
categories are: Maintenance, Metered and Operator. The specific function of these category types is
determined by the network.
CALL COSTING is based on the fact that the E1/R2 protocol for Argentina provides signaling to indicate
when the user initiates a toll free or collect DOD call. If the network confirms either of these call types after
the user completes dialing, the SMDA reports for the call will have no cost associated with the duration of
the call.
General Description 6 – 7
General Description GCA40–215