[ Date Index ] [ Thread Index ] [ <= Previous by date / thread ] [ Next by date / thread => ]
On 04/07/13 21:22, Mark Evans wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 04/07/13 11:30, Rob Beard wrote:Hi folks, I'm having a few issues with Asterisk and I wondered if someone might be able to suggest any ideas how I might be able to solve it? Basically we've got a machine running Asterisk with a Digium analogue card with two FXO ports and two FXS ports. The phones we use are Grandstream GXP1400/GXP1405 phones and one little Grandstream DECT IP phone (can't remember the model number off the top of my head).Maybe a DP715
Sounds familiar. :-)
The Asterisk box is connected to two BT lines which are located out in the middle of nowhere (well, at least a couple of miles outside of Totnes and what I suspect is a couple of bits of wet string). Due to the location we get a fairly low broadband speed and considering the other stuff we have going over the connection using VoIP probably wouldn't work too well (at least VoIP calls between sites as a test was hit and miss, sometimes worked, other times didn't), so until BT bring FTTC to the area we're a bit stuck with what we have. ISDN is a bit out of our budget too.SamKnows has a reference to 01/09/2013 for FttC on the Totnes exchange.
Interesting, there is a bit of hope then. I was checking on our head office in Newton Abbot today after spotting more FTTC cabinets, the BT Infinity checker seems to suggest it will happen any time between July and September for the cabinet we're on in Newton.
Fingers crossed once Totnes gets FTTC it won't take too long to get the cabinet enabled, but I guess being in the sticks it could be anything up to 2016 ish.
So the issue we're having is when someone calls in to the site, or someone calls out the volume of the caller at the office end in Totnes is quiet. We can hear who we are calling, or whoever calls in okay (we did have some echo issues but I think we've kind of solved them). We're using Asterisk SVN-branch-1.8-r383667 built from source with Dahdi 2.6.2 also built from source on Debian 6.0.7. I've tried adjusting the txgain in chan_dahdi.conf and it doesn't seem to make much if any difference (I've also restarted dahdi and Asterisk after making the changes). It's currently set at txgain = 22.0 (I wasn't sure how high to put it to).You could try a Zycoo ZX20-A202. Which is an ARM based Asterisk box with two FXO ports built in. (Around £140).
I don't think that would be an option due to budget constraints :-(
As a last resort we've tried an analogue phone and that does seem a bit louder, so this makes me think there is something happening in the phone system to cause it. At the moment the phone system is in the office and connected via some CAT5 cable to the phone lines which terminate in the next office (well one does, the other terminates at another location and is on a long extension cable).How long an extension cable? Might be better to run CW1308, even CAT5, t a secondary socket. Keeping the flex to under 2m.
It's about 10 metres of CAT5 at the moment running up the wall, into the ceiling space and back down into the other office, terminated each end with a CAT5 socket. I haven't actually tried a standard BT extension cable yet, I'll try this tomorrow. :-)
Rob -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq