Soundwin Network
Created by: samchen0809,Last modification on Wed 09 of Jul, 2008 [11:12 UTC] by celineyeh
http://www.soundwin.com
Soundwin at a Glance:
Founded in 2004 as a VoIP developer, Soundwin's main product lines have advanced VoIP
access devices such as 2 / 4 / 8 / 16 / 24 analog lines VoIP gateway, IP phone, ATA (Analogue
Telephone Adaptor), IP PBX, GSM + VoIP Gateway and Billing system for enterprise, SOHO,
and ITSP markets. Soundwin focus on delivering the latest VoIP technologies for real-time
multimedia communications over IP network.
Product lines include: 2~24 port FXO.FXS analogue VoIP gateway, WiFi VoIP gateway, GSM VoIP Gateway(quad-band GSM), VPN VoIP Gateway, IP PBX (Embedded Asterisk), ATA and IP Phone.
Soundwin’s Philosophy:
Soundwin designs its voice over IP solutions to offer VoIP without cutting the PSTN cord.
Soundwin VoIP are built with these five characteristics:
- Superior and reliable voice quality over internet.
- Interoperability with other telephony products
- Products that are easy to install, use, and manage
- Total solution in VoIP application
- Open architectures and standards compliance.
Core Competence, Key to Success:
Soundwin VoIP products utilize the most advanced iterations of IP Telephony, complemented by superior
voice quality, enabling it to become a key player in the global VoIP equipment market.
Soundwin's product lines include: 2~24 port FXS/FXO analogue gateway, Wi-Fi VoIP gateway, GSM VoIP gateway (quad-band GSM), IP PBX (embedded Asterisk), VPN VoIP Gateway, ATA and IP Phone.
Comments
333Decent FXO and FXS to SIP interface
After facing horible echo problems with Sipura SPA-3000 and Digium cards on some networks, echo was a big concern on any FXO interface. The Soundwin has a 64ms echo cancellor (EC) that does a great job at EC. I've been testing it on a couple of POTS lines that no amount of tweaking on the Digium card could clean up. Thus far not even the slightest echo has been heard.
As an FXO port it has a couple of rough edges. Auto answer cannot be shut off, it can only be delayed up to 8 seconds. When it answers the call it plays an "answer tone" and then connects to the registered SIP server. This tone can be shut off, but it then plays a very short dial tone in its place. There is currently no way to make it simply ring the SIP server and wait for an answer before picking up the line.
When using g729 the comfort noise generator seems way too loud. Every time you talk you hear excessive static from the EC. Under ulaw it seems fine.
So far this is the best bang for the buck FXO port I've used.
They have everything from a single FXS & FXO gateway all the way up to 24 port versions. Each size is available 100% FXO, 100% FXS and 50/50 FXO/FXS.
UPDATE: (5/27/06) After trying it on a production system for a few days some significant problems have surfaced.
1. The echo cancellor has a significant problem with double talk. Instead of diverging it seems to over mute one or both sides.
2. After running for a while it will fail to authenticate with Asterisk when answering a call and play a busy signal to the caller. Switching to an unauthenticated stanza in sip.conf is the only thing that seems to keep calls coming in.
3. Periodically calls seem to be spontaniously dropped.
I have pulled it from the production system and all lines are connected to the highly reliable and predictable Sangoma A200d.