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Alarms in Linux Media Servers
Issue 1 June 2005 97
Handshake Test
This test is destructive.
This test verifies that modem’s hardware is attached and that the modem can “handshake” with
the USB port. The test:
1. Tries to open the device
2. Sends a handshake string (ATZ) to the modem
The modem should return an “OK” string.
The following errors can be detected:
Off-Hook Test
This test is destructive.
Table 28: TEST Handshake Test
Error Code Test
Result
Description / Recommendation
Modem in
use, try again
later
ABRT Another application is currently using the modem. Try again later.
Could not
open USB
port
ABRT System error: An attempt to open the USB device failed.
1. Retry the test in about 5 minutes.
2. If the test still fails, escalate the problem.
Read error,
could not run
test
ABRT After the ATZ is sent, a read of the USB device is done. If the
read fails, a probable system error aborted the test.
1. Retry the test in about 5 minutes.
2. If the test still fails, escalate the problem.
Modem
Handshake
test failed
FAIL The modem did not return an “OK” string within a 15-second
interval.