Telecom infrastructure
Telecom infrastructure explained in plain language: how US carrier networks route calls and texts, what SIP trunking and elastic SIP actually do, how number portability works, why STIR/SHAKEN attestation matters, and what happens between an API call and a phone ringing. Useful background for engineers, product teams and anyone choosing a CPaaS or voice provider.
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What Is a Trunk Group? Understanding Elastic SIP Trunking
November 13, 2025
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What Is CPaaS? Features, Benefits, and Leading Providers in 2026
November 13, 2025
T-Mobile’s Subscriber Growth Slows Amid Intensified Competition
April 24, 2025
AT&T Considers Acquiring Lumen’s Consumer Fiber Business
April 1, 2025
FCC Chairman Brendan Carr Starts Granting Telecom Lobby’s Wish List
March 1, 2025
What Are DID Phone Numbers and How Do You Purchase Them?
September 7, 2022
Enabling SMS & MMS into your app
July 6, 2022
What is a VoIP Network and How Does It Work?
May 18, 2022
What is Voiceover Internet Protocol (VoIP)? Why do Businesses Use It?
April 26, 2022
What Is Voice API or Programmable Voice?
March 1, 2022
Internet of Things (IoT) Explained
February 15, 2022
The differences between CPaaS and SaaS
January 25, 2022
About this topic archive
Signalmash publishes on US business messaging and voice: 10DLC and toll-free registration, short codes, RCS, SIP trunking, Branded Caller ID and the carrier rules that sit behind all of them. Topic pages like this one group every article that touches a single subject so you can read the whole thread in order rather than piecing it together from the main blog index.
Articles here are written by the team that runs the platform, and are revised when carrier requirements or pricing change. Where a piece covers a live compliance process, it links to the underlying documentation so you can check the current rule yourself.
Start with the fundamentals
If you are new to the subject, these guides cover the ground most questions come back to: 10DLC registration, brand to campaign approval, choosing between short code, 10DLC and toll-free, and what A2P messaging compliance actually involves.
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