CPaaS LabFree University

T10 · T10-R28 · Observability and price

Numbers you may repeat

This lab's charts count things in the repository or things a page stated. A bar labeled lessons is a file count. A bar labeled fifteen is the E.164 maximum, and it should say so. A bar that looks like a service level, with no opened formula, does not belong here.

ExportSVGFlowSheet

Counts on this page

4boxes
6opened sources
2confirm rows
5study lines

Opened sources

Confirm rows, no URL

Learn it in 5 minutes

  • E.164's article states a maximum of fifteen digits.
  • The SMS article states up to 160 characters.
  • Bandwidth states 3.75 MB uploads, 48-hour file storage, HTTP 202, and a 24-hour webhook retry.
  • Plivo's WhatsApp page states USD 1,000 per month in the US data region and ₹1,00,000 per month in the India data region.
  • IANA's SIP parameters page shows Last Updated 2026-08-17. That is a registry date, not a call-quality score.

Visual

Numbers you may repeat Counts. Teaching sketch. Confirm a live system. 15 160 3.75 MB 1000 Names come from pages opened in 2026-10. A missing name stays confirm.

Count the boxes: 4. Each label is a name from a page or a study label marked on the drawing.

Flow

Numbers you may repeat Caller SIP Called session setup session setup RTP, not required to hairpin Teaching sketch from RFC 3261 and RFC 3550. Not a packet capture.

What is going on

This lab's charts count things in the repository or things a page stated. A bar labeled lessons is a file count. A bar labeled fifteen is the E.164 maximum, and it should say so. A bar that looks like a service level, with no opened formula, does not belong here.

Vonage's over 50+ languages is a page's phrase, not a measured count from this lab. If you repeat it, name the Voice page. Do not draw it as a percentage of the world's languages.

Worked example

Make a table with two columns: figure, and the page. Fifteen digits, E.164 article. 160 characters, SMS article. 3.75 MB, Bandwidth messaging guide. USD 1,000, Plivo WhatsApp prerequisites. Anything else: confirm.

Quiz

1. The fifteen-digit maximum in this lab comes from the E.164 article.

2. IANA's 2026-08-17 date is a mean opinion score.

Ecosystem

Sister pieces sit on the ecosystem page: the glossary, the mind map, the integration map, and the bridges.

  • Figure — A number this lab repeats only when the opened page states it.
  • Registry date — The Last Updated value on IANA's SIP parameters page. Not a product release.

Config. Put the unit next to the number: digits, characters, megabytes, hours, or dollars per month.

Troubleshooting. If two vendors disagree with Wikipedia's 160, cite both and do not average them.

Bridge. The charts page of this site uses the same rule. Lesson counts are repository counts. They are labeled as such.

Mind map, sister technologies, and future hooks live on the ecosystem page.

Sources and go deeper

Opened 2026-10. A row marked confirm has no link, because that page was not verified.

sources.json Markdown