Credits to Val, thank you for your help.
The attached PDF will help you set up your Grandstream HT503 device from scratch. It is a known working configuration so if you are having troubles with your Grandstream HT503 reset back to defaults and follow this guide.
Edit by LiptonBrisk: Set “SIP Registration Failure Retry Wait Time” to 120 seconds.
Enabling "Allow Incoming SIP Messages from SIP Proxy Only" is a good idea for preventing SIP scanners/hackers. However, you may want to change that setting to "No" because FPL to FPL and Fongo to FPL calls may not work with that setting enabled, depending on the server being used and how switches FPL uses are configured. Fongo Home Phone has this setting disabled..
Grandstream HT503 Setup Guide
Forum rules
DISCLAIMER
This forum is for those users who have already purchased a configuration file with the SIP settings needed to configure any SIP compatible device.
1. Please use this forum only as a means to share your configuration advice and guides for ATA devices and SIP clients that you are using with our service.
2. For any questions relating to device configuration, please use the other forum sections or post your question directly in the device topic that your question is meant for.
3. Please title your topics with only the name and model of your device so users can easily find the information they need.
4. Preferable format for posting here is compressing your screenshots of your successfully configured device into a .zip file, and post a brief description of the configuration.
Please stay on topic
DISCLAIMER
This forum is for those users who have already purchased a configuration file with the SIP settings needed to configure any SIP compatible device.
1. Please use this forum only as a means to share your configuration advice and guides for ATA devices and SIP clients that you are using with our service.
2. For any questions relating to device configuration, please use the other forum sections or post your question directly in the device topic that your question is meant for.
3. Please title your topics with only the name and model of your device so users can easily find the information they need.
4. Preferable format for posting here is compressing your screenshots of your successfully configured device into a .zip file, and post a brief description of the configuration.
Please stay on topic
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- Technical Support
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Grandstream HT503 Setup Guide
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