ay receive "02" alarms which can be caused by
the ANI controller logging more than three all zero failures on the
same trunk. The PSAP has been instructed to report this condition to
the SSC/MAC since it could indicate an equipment trouble at the PSAP
which might be affecting all subscribers calling into the PSAP. When
all zeroes are being received on all calls or "02" alarms continue, a
tester should analyze the condition to determine the appropriate action
to be taken. The tester must perform cooperative testing with the SCC
when there appears to be a problem on the Tandem-PSAP trunks before
requesting dispatch.

When an occasional all zero condition is reported, the SSC/MAC should
dispatch SSIM/I&M to routine equipment on a "chronic" troublesweep.

The PSAPs are instructed to report incidental ANI failures to the BOC
on a PSAP inquiry trouble ticket (paper) that is sent to the Customer
Services E911 group and forwarded to E911 center when required. This
usually involves only a particular telephone number and is not a
condition that would require a report to the SSC/MAC. Multiple ANI
failures which our from the same end office (XX denotes end office),
indicate a hard trouble condition may exist in the end office or end
office tandem trunks. The PSAP will report this type of condition to
the SSC/MAC and the SSC/MAC should refer the report to the SCC
responsible for the tandem office. NOTE: XX is the ESCO (Emergency
Service Number) associated with the incoming 911 trunks into the
tandem. It is important that the C/MAC tell the SCC what is displayed
at the PSAP (i.e. 911-0011) which indicates to the SCC which end office
is in trouble.

Note: It is essential that the PSAP fill out inquiry form on every ANI
failure.

The PSAP will report a trouble any time an address is not received on
an address display (screen blank) E911 call. (If a record is not in
the 911 data base or an ANI failure is encountered, the screen will
provide a display noticing such condition). The SSC/MAC should verify
with the PSAP whether the NO ALI condition is on one screen or all
screens.

When the condition is on one screen (other screens receive ALI
information) the SSC/MAC will request SSIM/I&M to dispatch.

If no screens are receiving ALI information, there is usually a circuit
trouble between the PSAP and the Host computer. The SSC/MAC should
test the trouble and refer for restoral.

Note: If the SSC/MAC receives calls fro