# PRODUCT

- [IMPORTANT INFORMATION ABOUT 9-1-1 SERVICE WITH VOIP PHONES](https://docs.colt.net/product/important-information-about-9-1-1-service-with-voip-phones.md)
- [EMERGENCY CALLS JAPAN](https://docs.colt.net/product/emergency-calls-japan.md)
- [PORTING INFORMATION](https://docs.colt.net/product/porting-information.md): Voice services
- [COUNTRY SPECIFIC PORTING INFORMATION](https://docs.colt.net/product/porting-information/country-specific-porting-information.md): Country specific porting information
- [PSTN SWITCH OFF](https://docs.colt.net/product/pstn-switch-off.md): Colt continues to support ISDN services. Everything you need to know ahead of the PSTN switch-off.
- [AUSTRIA PORTING PROCESS](https://docs.colt.net/product/austria-porting-process.md)
- [9-1-1 OBLIGATIONS OF LOCAL VOIP SERVICE PROVIDERS IN CANADA](https://docs.colt.net/product/9-1-1-obligations-of-local-voip-service-providers-in-canada.md)


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