How to configure linphone for video calls?

Question

I’m trying to enable communications between the following clients:

1. Nortel IP phone 1535.
2. Linphone 3.7.0 running on FreeBSD.
3. Linphone 3.7.0 running on iPhone (Linphone iPhone 2.2.3).

The good part is that audio calls work between all devices, no problem.

The bad part is that video does not work. The symptoms are different, however:

1. Nortel IP phone placing a video call to Linphone: nothing happens. Linphone does not see anything and the Nortel eventually times out.
2. Nortel IP phone placing an audio call to Linphone (succeeds) and then trying to enable video: nothing happens. Linphone does not react to “video” button being pressed on Nortel.
3. Linphone calling Nortel in regular (non-video) mode (succeeds) and then trying to turn on video on Linphone: nothing happens. Linphone's status line starts saying “Modifying call parameters” and that’s it.
4. Linphone calling Nortel in regular mode and then pressing “video” button on Nortel — Linphone opens up a small new window (presumably, intended for the video), but the new window remains black.

The Nortel phone supports only two video codecs: H.263 and H.264. The latter is not available on Linphone (even though I did build it from source), but the former is available and should be sufficient. Linphone on iPhone has only one video codec (VP8), which is not available on the Nortel phone.

Any ideas on how to address any of the above points?

Update: the port-triggering part of my router's configuration:

Outgoing Trigger Ports  Incoming Ports to Open
----------------------------------------------
UDP Any -> 3478-3479    UDP Any -> 3478-3479
                        UDP Any -> 5000-5100

Answer 1

What ports do I need to port trigger or forward in my router?**

##SIP settings
[sip]
#SIP port used
sip_port=5060

## RTP settings
[rtp]
#Audio RTP (UDP) port
audio_rtp_port=7078
#Video RTP (UDP) port
video_rtp_port=9078

Source Linphone Dcumentation

---

Does linphone work behind firewalls? What are the ports used?

Yes it works in most cases. The simplest way to achieve this is to active STUN support from the configuration box. You 'll need to enter the name of a STUN server, for examplestunserver.org. If your firewall or gateway does UDP masquerading, it should work without problem.

You may want to restrict the open ports on the firewall: you need at least to preserve the SIP port (udp/5060), the audio rtp port (udp/7078) and the video rtp port (udp/9078). All those ports are configurable from linphone, but keeping 5060 for SIP is highly recommended.

Customising audio and video ports is recommended when using several linphone behind a same NAT so that they don't share same port numbers on the NAT. They must be even numbers.

Source Linphone FAQ

---

You can configure the parameters with UDP port values used to transport IP Phone 1535 operational information (Audio, Video, and Local), according to the particulars of your network environment.

From the Main Menu select Settings > VoIP Settings > Misc. > Ports and press OK

Select the port type to configure (Audio, Video, or Local), and press OK.

The following are the acceptable value ranges by port type:

Audio:

Specify the port to be used by the IP Phone 1535 for audio-related VoIP activity. You can configure this with a value between 1024 and 65535 (The default value is 23000).

Video:

Specify the port to be used by the IP Phone 1535 for video-related VoIP activity. You can configure this with a value from 1024 to 65535 (The default value is 24000)

Local:

The Local port is the port used by the IP Phone 1535 in making connections to the proxy server - the port value you assign must be within the range from 1024 to 65535 (The default value is 5060).

Source Nortel IP Phone 1535 Installation and Commissioning