I'm interested in interfacing an OBi202 unit with an analog, dial-up modem. (Yes, I realize it's 2013 and all, but hey, PPP Battle Chess and stuff...)
The product data-sheet lists "Modem Pass Through (G.711)" support, and I'm just wondering if this is enabled by default, with modem activity being automatically detected, or if certain settings need to be changed in order to emulate this functionality.
The basic guidelines for modem pass-through support, as best I can tell, include the following:
- Use of the G.711 CODEC
- Disabling any high-pass filtration
- Disabling voice activity detection (corresponding to "Silence Suppression" in the OBi units?)
- Use of jitter buffer algorithms
- Disabling echo cancellation features
Most of these requirements can be addressed manually, from what I've been able to gather from the OBi admin guide, with the exception of disabling the echo cancelling, and any reference to high-pass filtering, neither of which are mentioned as configuration items. If these things are all taken care of automatically, per the stated pass-through support, then all-the-better.
Any help/information/ridicule is appreciated.