Pbx configuration testing, Overflow testing, 9145 out of service – Teo E911 Response System Installation User Manual
Page 72: Testing networked pbxs
Teo E911 Response Server 9145 Installation Instructions
Page 72
13-280133 Rev. C
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The PBX must be tested to ensure that 911 call overflow and Out of Service conditions are
handled correctly.
Overflow conditions are handled by the PBX. 911 calls should always have alternate
routing assigned in case the primary call path becomes unavailable.
If the 9145 ISDN line becomes busy because of too many calls, or the ISDN line is out of
service, the most important thing is for the call to complete to an operator even if that
means the operator only gets a pilot number.
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In the case where the PBX has more than one ISDN-PRI line, one or more of the additional
ISDN lines should be set as an overflow path.
Unplug the ISDN-PRI U line from the 9145. Place a test call. The 911 call should route out
one of the overflow lines. Verify that the call routes to a 911 Call Taker. The number (ANI)
that the Call Taker receives may be the station number, but it may also be a pilot number
depending on the PBX and CO settings.
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Remove power from the 9145 Server. The 9145 is designed to cut the ISDN-U (PBX) side
through to the ISDN-N (CO) side. Place a test call and verify the call connects through to
the 911 operator. The operator may receive the station number or a pilot number. Re-apply
power to the 9145. Verify that normal operation resumes.
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In a networked environment such as school district, there may be multiple remote
locations that route 911 calls through a single ISDN-PRI line. A test call must be made from
each location to ensure the remote switches are delivering the PBX station number to the
host, and that the host in turn is capable of delivering the station number to the 9145.
You can retrieve the event log to verify the calling station number and 10 digit number sent
for each of the test calls.