> For the complete documentation index, see [llms.txt](https://docs.localmail.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.localmail.io/messaging.md).

# Messaging

- [Learn more about SMS](https://docs.localmail.io/messaging/learn-more-about-sms.md): You can’t force the funnel, but you can engineer it.
- [SMS Character Limit](https://docs.localmail.io/messaging/learn-more-about-sms/what-sms-character-limit.md)
- [UCS-2](https://docs.localmail.io/messaging/learn-more-about-sms/what-is-ucs-2-character-encoding.md)
- [GSM-7](https://docs.localmail.io/messaging/learn-more-about-sms/what-is-gsm-7-character-encoding.md)
- [Alphanumeric Sender ID prefixes for SMS](https://docs.localmail.io/messaging/learn-more-about-sms/alphanumeric-sender-id-prefixes-for-sms.md): A Sender ID is a unique Value or E.164 formatted mobile number that shows in the “from” field of your text messages on your mobile phone
- [support for International  Alphanumeric Sender ID](https://docs.localmail.io/messaging/learn-more-about-sms/support-for-international-alphanumeric-sender-id.md): The alphanumeric sender ID technology allows the sender to send messages using a custom, recognizable sender ID constructed from any combination of numeric and alpha characters (0-9, a-z, A-Z)
- [SMPP Specification](https://docs.localmail.io/messaging/smpp.md)
- [Submitting Messages Through SMPP](https://docs.localmail.io/messaging/smpp/submitting-messages-through-smpp.md)
- [TLV Configuration for SMPP DLT Implementation](https://docs.localmail.io/messaging/smpp/tlv-configuration-for-smpp-dlt-implementation.md)
- [SMPP error codes](https://docs.localmail.io/messaging/smpp/smpp-error-codes.md)