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modem not hanging up GEMS 1-17-17
- To: "support" <support@gesn.com>
- Subject: modem not hanging up GEMS 1-17-17
- From: "Jeff Hallmark" <jeffh@dieboldes.com>
- Date: Sun, 3 Nov 2002 17:46:05 -0600
- Importance: Normal
Gems has a default
time out of 30 seconds before the modem is hung up in order to facilitate
regional uploads. This keeps the modem from hanging up for 30
seconds providing a small window in which the operator of an OS unit
can remove and insert a different card for upload preventing the
connection from closing. It has been reported that the observed
timeout is more than the 30 seconds because the carrier isn't dropped
immediatley by the phone company, or the local switch, and introduces more
latency. The following settings provided by Tab and Sophia may help to optimize
this situation, however there seem to be some telephone swithes around that
cannot implement the "jump over problem line within a hunt
group".
Refer to Bugzilla
1645 for some history on this issue.
Tab has had some
success disabling ARQ
Make sure that ARQ is set = &A0
Disabled
&A Enables/disables additional result code subsets
(seeXn).
&A0 ARQ result codes
disabled
&A1 ARQ result codes
enabled
&A2 V.32 modulation
indicator added
Sophia suggests that
the incoming "hunt group" AKS "rollover lines" be set for the
following behavior:
1) Select the next
phone that will answer with the "Least used policy"
2) Set the fail over
parameter to "Jump over a problem Line" this will theoretically jump over a line
that is off-hook.
___________________________________________________________________________________________________________________
The only sure work
around is to cycle power to the modem manually after the data has been
uploaded into Gems.
Finally when
Bugzilla 1645 is implemented we will have control over the Gems behavior but we
cannot control the telephone switch that implements the hunt group and therefore
we should set the behavior of Gems so that if the default timeout is changed we
should no longer monitor the carrier but rather monitor the data transmission;
when Gems determines success or failure uploading a card the line shoul be
dropped after the given Server Timeout.
Jeff Hallmark
Diebold Election Systems
972 542 6000 x157