![]() What are the bit rates supported on T.38 Fax? If it says 'NAT type is full cone' you should be fine, but if it says symmetrical or port-restricted, you will need to make adjustments on the intermediate device. One way to check is by configuring a STUN Server (you can find free public STUN Server settings online) and then noticing the NAT type under STATUS page. Make sure you're router or firewall has ports opened for SIP, RTP, etc like 5060, 5004. This is most likely due to intermediate device like Router/Firewall blocking UDP ports for SIP. I can make Outgoing calls but I cannot receive any incoming calls? We recommend that "NAT traversal" is always set to yes. Please check with Voip service provider to obtain this information, and fill in "outbound proxy" setting on the configuration of Grandstream products accordingly. Usually symmetric NAT issue can not be resolved using STUN detection mechanism which is supported by Grandstream products it can be solved on the media proxy server maintained by VoIP service provider. How do I resolve a symmetric NAT router issue, is there a way to know if I have that issue before I use the phone? Press the round button once more to initiate the Factory Reset. Once finished, press round button till cursor is on OK. Enter the MAC Address with alphabets and numbers. Move cursor to the empty space above the OK and CANCEL. Scroll down to CONFIG and select it (by pressing round button again) - Scroll down to Factory Reset and select it. Press the round MENU button to enter GUI. Once you see your complete MAC address on the LCD display, press the MENU button. Enter the MAC address as it is with numbers and alphabets. The ATA will reset automatically, now reconfigure the device from scratch. ![]() ![]() Now, enter the MAC address along with the correct encoding for alphabets. Please disconnect all ethernet cables, simply keep power and the phone connected to the Grandstream device. So to encode O, you need to press 6666 where first 6 encodes 6 itself, 66 encodes M, 666 encodes N and 6666 encodes O. Similarly, there is MNO on the number 6 key. So to encode B, you need to press 222 where first 2 encodes 2 itself, 22 encodes A and 222 encodes B. The encoding is based on the alphabetic notation on keypad of your regular phone.įor example, there is ABC on the number 2 key. How do I enter alphabets in MAC address for the Factory Reset? Syslog Level: You can set it to different Levels. 192.168.1.255) and then capture a trace on a PC on the same LAN. If you don't have one, you can enter a broadcast IP address (ex. Syslog Server: Enter the IP address of your Syslog Server. If your unit has Syslog feature (generally under Advanced Settings page), you can use it for debugging any issues. How do I enable Syslog feature on my unit? Simply press either the 'transfer' key or 'conference' key a second time. It's easy to cancel both these functions. How do I cancel "call transfer" or "conference"? Now, simply run the program and filter the trace with the unit's IP address. Your PC should have a sniffer program like Ethereal (available for free download online). Now, the computer can see all incoming and outgoing packets from the unit. ![]() How can I capture a packet trace from my unit?įirst you need to get hold of a Hub, connect your unit and a computer to this Hub. ![]()
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