Wholesale SIP
For our Wholesale SIP customers, we have a suite of documentation to support you. Please find on this page a variety of user guides, release notes and supporting information (including CDRs).
Wholesale SIP Release Notes
2025 Release Notes
2024 Release Notes
2023 Release Notes
2025 Release Notes
2024 Release Notes
2023 Release Notes

Wholesale SIP Guides
Wholesale SIP Guides
- API Developer Portal Guide - How to register, request for APPs and use the 'Try it out' feature
- Colt Number Coverage File
- Wholesale SIP Network Guide
- Wholesale SIP Service Matrix
API Developer Portal Video Guides
- How to authorise and Reserve using our APIs
- How to complete an Activation
- How to Port-in
- How to get Order Details
Guides for APIs launched pre-January 2025
- REST API Guide
- SOAP API Guide
- Voice API Samples
- SMS API Guide
- Colt Online User Account Management Guide
Numbers on Demand Guides
Numbers on Demand Video Guides
- What is Numbers on Demand?
- How to reserve a number
- How to activate a number
- How to port-in a number
- How to update the address of a number
User Guides for unrated CDRs
Twice daily unrated CDRs are available for the following products:
- IN services (Freephone, Shared Cost, IN Geo)
- Voice Line
- Voice Line (v) - unrated CDRs can be found under "IP Voice Line"
- SIP Trunking
- Carrier VoIP
- Geographic Number Hosting
- API Developer Portal Guide - How to register, request for APPs and use the 'Try it out' feature
- Colt Number Coverage File
- Wholesale SIP Network Guide
- Wholesale SIP Service Matrix
API Developer Portal Video Guides
- How to authorise and Reserve using our APIs
- How to complete an Activation
- How to Port-in
- How to get Order Details
Guides for APIs launched pre-January 2025
- REST API Guide
- SOAP API Guide
- Voice API Samples
- SMS API Guide
- Colt Online User Account Management Guide
Numbers on Demand Guides
Numbers on Demand Video Guides
- What is Numbers on Demand?
- How to reserve a number
- How to activate a number
- How to port-in a number
- How to update the address of a number
User Guides for unrated CDRs
Twice daily unrated CDRs are available for the following products:
- IN services (Freephone, Shared Cost, IN Geo)
- Voice Line
- Voice Line (v) - unrated CDRs can be found under "IP Voice Line"
- SIP Trunking
- Carrier VoIP
- Geographic Number Hosting
