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From: | Matthias Thomae |
Subject: | [Ant-phone-devel] latency |
Date: | Tue, 18 Nov 2003 13:19:39 +0100 |
User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030930 Debian/1.4-5 |
Hello Roland and list,I'm interested in using my old PII-233 notebook (with debian/unstable) as a phone, possibly as a 'gateway' for a bluetooth headset. I had the impression that ant-phone would just be the right application, and installed it yesterday.
At first, I couldn't get the debian package working, getting a segmentation fault just after reading /var/lib/isdn/calls. Moving that file away helped. By the way, I also noticed that ant-phone was looking for some isdn.conf file in /home/ernie.
As I don't have a bluetooth headset yet, I tried a wired one on the built-in soundcard (ESS1868, I think that's a ISA chip), via the OSS emulation af ALSA. The notebook is wirelessly connected through an USB bluetooth dongle to an AVM BlueFritz AP-X, with bluez, the capi profile and the i4l compatibility module (capidrv), see http://www.holtmann.org/linux/bluetooth/isdn.html
This setup technically worked, however there is a latency of half a second or a second or so, which makes the whole thing impractible (at least for me).
Before I start doing more tests, I'd like to know if there are ideas around to the cause (and solutions) of these delays. I could think of:
- the relatively slow cpu - the bluetooth connection, however pings are in the range of 50 ms - the sound driver - the soundcard itself Regards. Matthias
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