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Five questions to evaluate a SIP trunk provider
![A mobile phone showing a voice output indicating things to evaluate a SPI trunk provider on.](https://www.bandwidth.com/wp-content/uploads/2024/07/991e201f0bb0dc9a226c6730f952b5eb-900x500-c-default.png)
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Emergency
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How to scale your communications with SIP trunking
![](https://www.bandwidth.com/wp-content/uploads/2024/07/600c4ca970ea881272884dda82ce3205-900x500-c-default.png)
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Voice
Free SIP trunks: Do they exist?
![Abstract server with cloud and phone symbols to represent SIP trunking](https://www.bandwidth.com/wp-content/uploads/2024/07/76356da3eed9266881b461d2d148f416-900x500-c-default.png)
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Phone Numbers
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How to troubleshoot VoIP call quality issues
![A phone call with a warning sign indicating call quality issues](https://www.bandwidth.com/wp-content/uploads/2024/07/c4fb7159b89e0ae95073d7d0ca0b2601-900x500-c-default.png)
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Optimize your contact center with Interactive Voice Response (IVR)
![](https://www.bandwidth.com/wp-content/uploads/2024/07/3030b811d4d16ec2dce5c5ce29a2896e-900x500-c-default.png)
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Packet loss: Why does it happen and how do you prevent it?
![A mobile phone with a voice symbol](https://www.bandwidth.com/wp-content/uploads/2024/07/fc17e47e2f51c4a5ade943726c0f4e4b-900x500-c-default.png)
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Are you getting value from your CPaaS?
![Telephone symbol surrounded by clouds to represent telecom](https://www.bandwidth.com/wp-content/uploads/2024/07/3432bfa3993a4e4d0b4737ce0d44124f-900x500-c-default.png)
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Is compliance the next major battleground for automation?
![A demo of how RCS is making hotel check-ins incredibly easy for guests](https://www.bandwidth.com/wp-content/uploads/2024/07/cece6fb40ecd6759704a3dcfe7ab0e78-900x500-c-default.png)
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Hosted PBX vs SIP trunking, explained
![Abstract server with cloud and phone symbols to represent SIP trunking](https://www.bandwidth.com/wp-content/uploads/2024/07/76356da3eed9266881b461d2d148f416-900x500-c-default.png)
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Voice
What is a SIP trunk channel?
![](https://www.bandwidth.com/wp-content/uploads/2024/07/5e3463f1bbd532487afb28cc11d6561e-900x500-c-default.png)
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Can you fax over a SIP trunk?
![Phone with document symbol](https://www.bandwidth.com/wp-content/uploads/2024/07/0be63e3374832df24a7eeb310ec051d3-900x500-c-default.png)
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How many channels are in a SIP trunk?
![Purple shield showing a secure SIP trunk and channels coming out of it](https://www.bandwidth.com/wp-content/uploads/2024/07/18204d2440a0e0e962dd298764645a46-900x500-c-default.png)