PHONE INTERRUPTION AND RECOVERY TEST RECORD
Yenra | https://yenra.com/teleph/tester.html
Prepared October 9, 2026

Purpose: define one repeatable application task and interruption, then record
observations against an approved requirement. This is a planning aid, not RF
connection guidance. Use authorized lab equipment, test accounts/content, and
the actual instrument documentation and lab isolation procedure.

Case ID / author / date:
Requirement and revision:
Handset model / firmware / application build:
Instrument / software / installed options:
Network configuration / test subscription identifier (avoid personal data):
Task / test file / expected file hash:
Initial screen, account, battery and application state:
Baseline behavior with no interruption:
Interruption event / trigger timing / answered or rejected:
Expected retained state:
Recovery definition (first useful event):
Allowed recovery time (seconds) and source of this requirement:
Other pass/fail criteria:
Clock synchronization or measured offset / timestamp uncertainty:
Evidence to capture and where it will be retained:
Cleanup and reset steps:

For each run record:
Run ID / actual configuration deviations:
Task start time:
Interruption arrival time:
Service release time:
First useful recovery time:
Recovery interval = recovery time - release time (seconds):
Retained state / retries / duplicates / error messages:
Completed artifact and integrity check:
Separate verdicts: timing / state retention / integrity:
Evidence filenames:
Cleanup completed / next action:

FICTIONAL EXAMPLE -- NOT AN INSTRUMENT OR PHONE MEASUREMENT
Rule invented for teaching: resume within 3.0 seconds of call release, keep
completed progress, and verify the finished file against its expected hash.
Transfer begins at 0.0 s; incoming call arrives and is answered at 5.0 s;
call releases at 15.0 s; useful transfer resumes at 18.4 s.
Recovery: 18.4 - 15.0 = 3.4 s. Timing fails by 0.4 s.
Progress retention and final file hash pass in this invented scenario.
Replace this threshold with the actual product requirement for a real test.

Report repeated runs individually. Change one condition at a time. Preserve
the distinction between application, signaling and RF evidence. Redact private
account information before sharing a report.

Historical context: Anritsu MD8470A Service Interruption Test application note,
August 2007, version 2.00. Equipment and option limits remain source-specific:
https://dl.cdn-anritsu.com/en-us/test-measurement/files/Application-Notes/Application-Note/MD8470A_EF10200.pdf