Async Pad Service Signals - Cabletron Systems Netlink FRX4000 User Manual

Async PAD Service Signals

Async Terminal Operations
or – is the letter "D" or "P" (if P, the data will not be echoed locally),
D P
– is the user data.
data
An example of a Call Request to called address
facility plus user data "
An Abbreviated Address
if no facilities are included. Also, X.28 convention demands that when
sending a Call Request packet using an abbreviated address, you precede
the address with a period. If you want to add user data to the packet, you
must separate it from the abbreviated address with an asterisk. The format
is:
.address*data
If the Call Request is successful, the async PAD will receive a Call Accept packet
from the device at the other end of the call. Connection is now established, and the
terminal will display COM. If the Call Request fails, the terminal will display a diag-
nostic message explaining why. The various messages are some of the PAD service
signals described later in this appendix.
To send data once you are in
enter mode and type
Command
Transmission of PAD service signals is determined by
parameter 6.
(Asterisk) – is normally the PAD prompt character.
*
– means that a vitual circuit has been established with a subscriber
"nnnnn" COM
whose ID is
"nnnnn."
ALREADY CONNECTED
be made until the current call is cleared.
AUTOCALL INITIATED BY SUBSCRIBER "nnnmm"
AUTOCALL RETRIES EXHAUSTED-RETURN TO COMMAND STATE
autocall retry timer has expired.
– indicates that the call is being cleared.
CALL CLEARED
– is displayed when the network does not respond to a virtual circuit
CALL TIMED OUT
call setup request within a certain time.
CLR (cause) (cause code) (diagnostic code)
Some common causes and codes are listed in
– confirms the clearing of a call.
CLR CONF
DISCONNECT TIMER EXPIRED
expired.
" is:
abcde R-1000000000Dabcde
can be substituted for the complete called address
mode, simply enter the data. To clear a call,
Data Transfer
. The async terminal will display:
clr [Enter]
– indicates there is already a VC set up, so another call cannot
– is displayed when the call is cleared.
Appendix
– indicates that the inactivity timer on the port has
with the Reverse Charging
1000000000
async PAD profile
– is self-explanatory.
– means that the
B.
.
CLR conf
A-3