Amtelco infinity series - A Terminal Originating a Call

Using “D” Messages for Layer 3 • 8-13 •
The H.110 Basic Rate ISDN Board
In the “DS” command, the 06 indicates the B channel, in this case the B1
channel for the fourth port, the “S” indicates a bearer capability of speech,
the first “N” indicates that there is no progress indicator, the second “N”
indicates normal alerting, and the calling number is 7654321. The terminal
sends an ALERTing message indicating that it has accepted the call and is
alerting the user. The CONNect message indicates the user has answered
the call. The DISConnect occurs when the user hangs up. The cause code
indicates normal clear. This causes the board to send a RELease message.
The terminal finally responds with a RELease COMplete message to end
the call. The cause code is unspecified.
8.7.2 A Terminal Originating a Call
In this example, a call is placed from the terminal. The terminal is using
overlap sending. In overlap sending, the dialed digits are sent in one or
more INFOrmation message until the network has enough digits to
complete the call. It is also possible for one or more of the digits to appear
as a Keypad element in the SETUP message. In this case the “DS”
message might take the form DS06SK7654321. A third possibility is that
the entire called number is present. This is called “enbloc” sending. With
enbloc sending the “DS” message would appear as “DS06SC7654321” and
no more digits would be expected.
commands responses description
DS06SD5551000 SETUP message
DK067 Keypad message
DK066 Keypad message
... keypad messages
DK061 Keypad message
DA06IR ALERTing message
DC06 CONNect message
DD0610 DISConnect message
DR06R RELease message
The initial SETUP message indicates that this is a speech call. The digits
following the “D” are the calling party number. The board selected the B1
channel as it was not in use. It sent a SETUP ACK message in response