> ## Documentation Index
> Fetch the complete documentation index at: https://docs.telegent.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Appendix

> ID glossary and common error reference for the Telegent API.

## ID Glossary

Every ID in Telegent has a prefix that tells you exactly what it refers to. When you see an unknown ID in a payload or error message, look it up here first.

| ID             | Resource       | How it's created                                                      |
| -------------- | -------------- | --------------------------------------------------------------------- |
| `AID`          | Account        | `POST /v1.0/account/create`                                           |
| `TSUID`        | Subscriber     | `POST /v1.0/subscribers/create`                                       |
| `MRID`         | Message Route  | `POST /v1.0/message/routes` — required to provision numbers           |
| `CRID`         | Voice Route    | `POST /v1.0/voice/routes` — required if `VoiceEnabled`                |
| `PID`          | Product        | `POST /v1.0/products` — smallest billable unit, bundled into Packages |
| `PKID`         | Package        | `POST /v1.0/packages` — a bundle of Products sold at one price        |
| `NID` / `TNID` | Phone Number   | `POST /v1.0/numbers/provision` or `/numbers/portin`                   |
| `ICCID`        | SIM            | Physical SIM or eSIM identifier — optional on most calls              |
| `CFID`         | Call Filter    | Per-subscriber Guardian call-filter record                            |
| `MFID`         | Message Filter | Per-subscriber Guardian message-filter record                         |

<Info>
  `PRID` and `PIID` also appear in some endpoints (Phone Rate ID, Product Item ID). For their exact meaning and where they apply, see [docs.telegent.com](https://docs.telegent.com) — the spec is the source of truth.
</Info>

***

## Common Errors

| Error                               | Area         | Resolution                                                                                                                          |
| ----------------------------------- | ------------ | ----------------------------------------------------------------------------------------------------------------------------------- |
| `401`                               | Auth         | Bearer token expired, or the token's `ApiEndpoint` scope doesn't match the URL you called. Generate a fresh, endpoint-scoped token. |
| `MessageRouteId required`           | Routes       | You skipped Phase 4. Create an MRID before `/numbers/provision`.                                                                    |
| `Email already exists`              | Subscribers  | Subscriber emails are unique platform-wide. Pick a different one.                                                                   |
| `Invalid AccountId`                 | Account      | AID typo or you used a sandbox AID against production. Verify with your rep.                                                        |
| `NumberType / MessageType mismatch` | Provisioning | `iot` = p2p only; `voip` = a2p only. Use `mvno` for a2p on a mobile line.                                                           |

***

<CardGroup cols={2}>
  <Card icon="arrow-left" href="/best-practices/reference" title="Back to Reference">
    Full request/response payloads and field tables
  </Card>

  <Card icon="code" href="/api-reference/introduction" title="API Reference">
    Full OpenAPI spec with interactive playground
  </Card>
</CardGroup>