Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

 NT7D16 Data Access card

The user may abandon the call during the dialogue phase using one of the 
following methods:

•

Terminal off-line This method is useful for RS-232-C interface only. 
The equipment drops Data Terminal Ready (DTR) to indicate an idle 
connection. For example, if the equipment is turned off, the DAC 
interprets that signal as an idle connection.

•

Long break The user sends a break (transmit line held in the OFF or 
SPACE state) for more than 1.2 seconds. The break is not transmitted to 
the far end. At the end of the long break, the DAC port initiates call 
disconnect. The AILU converts the dropping of DTR into a long break 
for the RS-422 interface. The long break feature can be disabled through 
the Modify menu on the DAC port.

•

Three short breaks When the user equipment transmits three breaks to 
the far end, the DAC abandons the call. Note that the breaks must be 
spaced at least 10 msec apart, and all three must occur within 3 seconds.

This feature is implemented by means of the Make Set Busy (MSB) station 
feature. When this is activated, any attempt to reach the specified Data DN 
will result in a busy signal.

This application, which operates only in the RS-232-C mode, requires a 
non-standard RS-232-C interface. Only two of the possible sixteen RS-232-C 
modes can be used: Mode 8 (DCE, Host, Normal DTR, Manual dial), and 
Mode 12 (DCE, Terminal, Normal DTR, Manual dial). This feature is 
configured in the software, and is downloaded to the DAC.

A DTR timeout period is started whenever the DTR signal lead makes the 
transition to OFF. If DTR is returned to ON within the set time period 
(5 seconds), the DAC port operates as if this feature was not activated. If the 
DTR remains OFF beyond the 5 seconds, the system receives an MSB feature 
key message. The DAC sends another MSB message when the DTR returns 
to ON, and the port is able to receive inbound calls.