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Administering PAD, X.25, and Frame Relay
Administering PAD
MAX Administration Guide
8-7
Understanding PAD service signals
The PAD transmits PAD service signals to the terminal server to acknowledge PAD commands
and to inform the user about the internal state of the PAD. The terminal-server user can
T3POS T2
Specifies the Syn-to-Syn timer. This timer applies to opening
frames in Local or Bin-Local mode. Normally, the PAD sends Syn
signals to the DTE at the interval specified by the T2 timer to indi-
cate that an idle link is still alive. However, if the DTE sends a Syn
signal to the PAD before the PAD sends one to the DTE, the T2
timer specifies the period of time the PAD expects Syn signals from
the DTE. If the PAD does not receive two Syn signals with the
interval specified by the T2 timer, it tries to restore the link. The T2
timer only applies to the opening frame and to Local or Bin-Local
mode.
T3POS T3
Specifies the ENQ handling timer. This timer indicates the amount
of time the PAD waits for an ENQ from the host. This is not appli-
cable when you set the ENQ Handling parameter to Off.
T3POS T4
Specifies the Response Timer. This timer indicates the amount of
time the PAD waits for a Syn from the DTE while the PAS is wait-
ing for a response from the DTE. The Syn signal indicates that the
response from the DTE is being delayed and also indicates that the
link is still alive.
T3POS T5
Specifies the Data Link Escape (DLE), End of Transmission (EOT)
timer. This timer indicates the maximum idle-time the PAD allows
for a T3POS call (this is similar to the VC inactivity timer in the
X25/PAD). The T5 timer applies only to transparent and blind
mode only; it is disabled in both Local mode and Bin-Local mode.
The T5 timer may apply even if the default modes for both the host-
and DTE-initiated calls are Local or Bin-Local. This is because the
mode can be changed through an opening frame, in which case this
parameter applies. The T5 timer applies only to transparent and
blind mode; it is disabled in both Local mode and Bin-Local mode.
T3POS T6
Specifies the Frame Arrival timeout. This timers indicates the max-
imum amount of time allowed between the time a dial-up connec-
tion is established and the first character of an opening frame is
received.
Table 8-3. PAD-specific parameters (continued)
Parameter
Description