N O V A T E L W I R E L E S S T E C H N O L O G I E S L T D .
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A T C o m m a n d S p e c i f i c a t i o n - E x p e d i t e a n d M e r l i n
W i r e l e s s I P M o d e m s
TCP Timer
Description:
When using TCP, a session is initiated by one party calling and the other party accepting or declining the
session request. Once a session is established, the two parties listen only to one another (unless multiple
sessions are permitted). After a session is completed and both parties want to disengage, a session tear
down message is sent from one to the other. Both parties tear down the stack and are then available to
set up another session with someone else. In the event that a tear down message is not received by a
modem, an idle timer is available which will tear down the session after a predetermined interval of
inactivity by either party. The values setting for this timer is specified in the TCP Timer register, TCPT.
Format:
ATTCPT?
Query TCP Timer setting
ATTCPT=value [ 0 to 255 minutes]
To set the timer value (minutes)
ATTCPT=0
To disable the timer
Validity:
Other Considerations:
A setting of 0 indicates the timer is not used. The minimum setting is 1 minute. It should be noted that
when using a sleep mode modem, care should be taken in the selection of an appropriate value, as sleep
intervals may create a longer interval of inactivity.
Related Topics:
