> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.ecall-messaging.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Interfaces, Connections & Protocols

* [HTTP/HTTPS](/en/article/httphttps-1fgw7q/)

* [REST](/en/article/rest-1rp9k8/)

* [SMPP](/en/article/smpp-1udvjv6/)

* [WebService](/en/article/webservice-1pzzo4h/)

* [E-mail](/en/article/e-mail-u91ty/)

* [Web browser](/en/article/web-browser-rhrz9u/)

* [Access via SMS](/en/article/acess-via-sms-cqu99s/)

* [Microsoft Exchange](/en/article/microsoft-exchange-1uxsl14/)

* [Outlook Mobile Service](/en/article/outlook-mobile-service-1digqlh/)