Sipura phones
I just wanted to leave an update for anyone who is following the Asterisk PBX saga..
I had quite a bit of trouble with the Sipura-841 phones I ordered. I bought 4, and had to return 2 of them because they became unusable after a week. One created a terrible scratchy screeching noise on the recieving end of the call when using the handset. The other had a bad network card, and would not talk to the network at all.
When I recieved my replacement phones, and brought them up to the most recent firmware, I found that calls made on the handsets where often barely audible on the recieving end. It was pretty disappointing. I emailed telephonyware, my vendor, and they where quite helpful.
They provided me with a special firmware patch, and it did resolve ths issue. The church has been using the phones now for 2 weeks without complaint.
Overall, I still would recommend the Grandstream GXP-2000 phones over the Sipura 841. My GXP-2000 has worked perfectly from the first time that I flashed the firmware. The sound quality has always been good, and it has a lot more features built in. I think at most vendors it is runing 10 or 15 dollars more than the Sipura phone, but the upgrades and reliabilty are well worth the money.