Two small problems come up constantly in phone system work, and neither deserves a spreadsheet formula or a software install. The tools on this page handle both directly in the browser. They are free, require no signup or account, and store nothing — you enter your numbers, read the result, and close the tab.

The Cisco CDR date/time converter deals with a quirk of Cisco Call Manager exports: CUCM writes the DateTime fields in its call detail records as Epoch timestamps — long integers counting seconds since 1970 — rather than readable dates. A telecom administrator tracing a disputed call or auditing a CDR export ends up staring at values like 1717804800 with no idea which afternoon they refer to. Paste the Epoch value into the converter and it returns the human-readable date and time, in both directions, so you can also turn a known date back into a timestamp when filtering raw records.

The call center agents calculator answers a different question: given your expected call volume, how many agents should be on the floor? Enter calls per hour, average handling time, and the service level you want to hit, and the calculator applies Erlang C — the standard queueing model for call center staffing — to estimate the agent count required. It is aimed at managers planning headcount for a new queue, sizing seasonal coverage, or sanity-checking whether chronic hold times trace back to understaffing rather than agent performance. Both tools work on any device with a browser.