CallDaddy
Pre-paid VOIP services. H.323 IP phone, gateway, gatekeeper, NetMeeting or any other H.323 compliant terminal necessary.
www.calldaddy.com
IP Phone Warehouse
Offers VoIP solutions from brands such as Polycom, Cisco, Linksys,and Aastra.
www.ipphone-warehouse.com
M5 Net Phone Systems
Provides IP Telephony and PBX telephone key systems using VOIP in the greater New York and New Jersey area.
www.m5net.com
Free IP Call
UK/French SIP proxy service provider with 0845 non-geographic phone numbers.
www.freeipcall.com
Abbey IP Ltd.
Supply and install new and second hand phone systems.
www.abbeyip.co.uk
Hip-ip
Supplier of Skype compatible phones, USB phone adapters, and VoIP hardware
www.hip-ip.com
Nautilus Secure Phone
Program that allows two parties to hold a secure voice conversation using Linux and TCP/IP.
nautilus.berlios.de
Telco Ltd.
Sells, installs and services business digital and IP phone systems and voice mail equipment. Located in Tempe, Arizona, U.S.A.
www.telcoltd.com
PBXnSIP
Software based IP PBX phone system for Windows, Linux and Macintosh. Has details of their products, interoperability, support, contact information and a news section.
www.pbxnsip.com
RFC 3054
Megaco IP Phone Media Gateway Application Profile. P. Blatherwick, R. Bell, P. Holland. January 2001.
tools.ietf.org