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

# Voice Services

- [INTELLIGENT NUMBER ROUTING PLATFORM](https://docs.colt.net/datasheets/voice/intelligent-number-routing-platform.md)
- [SIP TRUNKING](https://docs.colt.net/datasheets/voice/sip-trunking.md): Fully featured Colt SIP Trunking
- [WHOLESALE SIP](https://docs.colt.net/datasheets/voice/wholesale-sip.md)
- [ISDN SERVICES](https://docs.colt.net/datasheets/voice/isdn-services.md): Colt ISDN Services
- [VOICE ON-DEMAND PORTAL](https://docs.colt.net/datasheets/voice/voice-on-demand-portal.md)