No I hadn't installed any non-free codecs (not knowingly anyway).
I wanted to confirm this so I booted from clean live USB memory stick image (Jaunty).
Selected ekiga for installation.
Synaptic informs that the following are required: libgsm1, libopal3.6.1, libpt2.6.1, libpt2.6.1-plugins-alsa, libpt2.6.1-plugins-v4l2. (All of these come from the Main repository).
Once above are installed: Ekiga has the same problem as described above (PDU exceed 1500) and same solution as you describe above also works.
Yannick,
No I hadn't installed any non-free codecs (not knowingly anyway).
I wanted to confirm this so I booted from clean live USB memory stick image (Jaunty). 6.1-plugins- alsa, libpt2. 6.1-plugins- v4l2. (All of these come from the Main repository).
Selected ekiga for installation.
Synaptic informs that the following are required: libgsm1, libopal3.6.1, libpt2.6.1, libpt2.
Once above are installed: Ekiga has the same problem as described above (PDU exceed 1500) and same solution as you describe above also works.
Out-of-the-box Audio codecs: G722, Speex(16kHz), PCMA, PCMU, G726-16, G726-24, G726-32, G726-40, gsm, ms-gsm, Speex(8kHz).
Out-of-the-box Video codecs: h261, theora.
So, in answer to your question, only using default packages from Ubuntu is sufficient for PDU to exceed 1500.