voip for small business
voip for small business
Cisco VoIP and Skype?


Cisco Small Business SPA 301 VoIP Phone SPA301G1 SPA301-G1

Cisco Small Business SPA 301 VoIP Phone SPA301G1 SPA301-G1


$45.94


Cisco Small Business SPA 301 VoIP Phone SPA301G1 SPA301-G1

Switching to VoIP

Switching to VoIP


$31.99


More and more businesses today have their receive phone service through Internet instead of local phone company lines. Many businesses are also using their internal local and wide-area network infrastructure to replace legacy enterprise telephone networks. This migration to a single network carrying voice and data is called convergence, and it's revolutionizing the world of telecommunications by slashing costs and empowering users. The technology of families driving this convergence is called VoIP, or Voice over IP. VoIP has advanced Internet-based telephony to a viable solution, piquing the interest of companies small and large. The primary reason for migrating to VoIP is cost, as it equalizes the costs of long distance calls, local calls, and e-mails to fractions of a penny per use. But the real enterprise turn-on is how VoIP empowers businesses to mold and customize telecom and datacom solutions using a single, cohesive networking platform. These business drivers are so compelling that legacy telephony is going the way of the dinosaur, yielding to Voice over IP as the dominant enterprise communications paradigm. Developed from real-world experience by a senior developer, O'Reilly's Switching to VoIP provides solutions for the most common VoIP migration challenges. So if you're a network professional who is migrating from a traditional telephony system to a modern, feature-rich network, this book is a must-have. You'll discover the strengths and weaknesses of circuit-switched and packet-switched networks, how VoIP systems impact network infrastructure, as well as solutions for common challenges involved with IP voice migrations. Among the challenges discussed and projects presented: building a softPBX configuring IP phones ensuring quality of service scalability standards-compliance topological considerations coordinating a complete system ?switchover? migrating applications like voicemail and directory services retro-interfacing to traditional telephony supporting mobile users security and survivability dealing with the challenges of NAT To help you grasp the core principles at work, Switching to VoIP uses a combination of strategy and hands-on "how-to" that introduce VoIP routers and media gateways, various makes of IP telephone equipment, legacy analog phones, IPTables and Linux firewalls, and the Asterisk open source PBX software by Digium. You'll learn how to build an IP-based or legacy-compatible phone system and voicemail system complete with e-mail integration while becoming familiar with VoIP protocols and devices. Switching to VoIP remains vendor-neutral and advocates standards, not brands. Some of the standards explored include: SIP H.323, SCCP, and IAX Voice codecs 802.3af Type of Service, IP precedence, DiffServ, and RSVP 802.1a/b/g WLAN If VoIP has your attention, like so many others, then Switching to VoIP will help you build your own system, install it, and begin ma

Cisco Small Business Pro Unified Communications 320 With 4 FXO VoIP UC320W-FXO-K9

Cisco Small Business Pro Unified Communications 320 With 4 FXO VoIP UC320W-FXO-K9


$763.27


Cisco Small Business Pro Unified Communications 320 With 4 FXO VoIP UC320W-FXO-K9

Cisco Unified Communications 500 Series For Small Business VoIP Gateway 0 / 1 16 Users UC52016U2BRIK9RF

Cisco Unified Communications 500 Series For Small Business VoIP Gateway 0 / 1 16 Users UC52016U2BRIK9RF


$2576.77


Cisco Unified Communications 500 Series For Small Business VoIP Gateway 0 / 1 16 Users UC52016U2BRIK9RF

Cisco Unified Communications 500 Series For Small Business VoIP Gateway 48 Users UC52048UTEFK9

Cisco Unified Communications 500 Series For Small Business VoIP Gateway 48 Users UC52048UTEFK9


$6048.96


Cisco Unified Communications 500 Series For Small Business VoIP Gateway 48 Users UC52048UTEFK9

Cisco Small Business SPA 501G VoIP Phone 8 Line IP Phone PoE and PC Port SPA501G

Cisco Small Business SPA 501G VoIP Phone 8 Line IP Phone PoE and PC Port SPA501G


$83.19


Cisco Small Business SPA 501G VoIP Phone 8 Line IP Phone PoE and PC Port SPA501G

Cisco Small Business SPA 504G - VoIP Phone. Each

Cisco Small Business SPA 504G - VoIP Phone. Each


$167.32


Manufacturer: Cisco Systems, Inc. Each. Part of the Cisco Small Business Series, the SIP-based Cisco SPA 504G 4-Line IP Phone has been tested to ensure comprehensive interoperability with equipment from voice over IP (VoIP) infrastructure leaders, enablin

Cisco Small Business Pro SPA 501G - VoIP phone. Each

Cisco Small Business Pro SPA 501G - VoIP phone. Each


$109.54


Manufacturer: Cisco Systems, Inc. Each. Part of the Cisco Small Business Pro Series, the SIP- based Cisco SPA 501G Basic 8-Line IP Phone has been tested to ensure comprehensive interoperability with equipment from voice over IP (VoIP) infrastructure leade

Cisco Small Business Pro SPA 502G - VoIP phone. Each

Cisco Small Business Pro SPA 502G - VoIP phone. Each


$142.42


Manufacturer: Cisco Systems, Inc. Each. Part of the Cisco Small Business Pro Series, the SIP based Cisco SPA 502G 1-Line IP Phone has been tested to ensure comprehensive interoperability with equipment from voice over IP (VoIP) infrastructure leaders, ena

Cisco Small Business Pro SPA 504G - VoIP phone. Each

Cisco Small Business Pro SPA 504G - VoIP phone. Each


$163.48


Manufacturer: Cisco Systems, Inc. Each. Part of the Cisco Small Business Pro Series, the SIP-based Cisco SPA 504G 4-Line IP Phone has been tested to ensure comprehensive interoperability with equipment from voice over IP (VoIP) infrastructure leaders, ena

Skylink SC-1000 Complete Wireless Alarm System, White

Skylink SC-1000 Complete Wireless Alarm System, White


$145.00


Featuring rolling-code technology, the Skylink SC-1000 Complete Wireless Alarm System provides maximum security and reduces the likelihood of false alarms. Suitable for homes, offices, 24-hour stores, businesses, or wherever security is a concern, this all-in-one system offers a 100-foot operating range, installs in minutes, and requires no monitoring services or fees..caption {font-family: Verdan...

Skylink SC-1000 Complete Wireless Alarm System

Skylink SC-1000 Complete Wireless Alarm System


$139.99


Skylink Wireless Alarm System... It's a complete WIRELESS security system that can be installed easily in minutes. It's ideal for your home, business office, stores, retail operations, wherever security is a concern. And thanks to the emergency dialer, there are no monthly charges because you don't have to sign up for additional monitoring services. The control panel can control up to 24 different...

Logitech Laptop Headset H555 Portable Audio For Notebooks (981-000261)

Logitech Laptop Headset H555 Portable Audio For Notebooks (981-000261)


$59.99


The Logitech Laptop Headset H555. Pure digital sound, to go. The lightweight USB headset folds flat and delivers crystal clear digital sound. Overview: This flat-folding USB headset gives you pure digital sound for your Internet calls, music, movies, and games while you're on the go.The lightweight, easy-to-carry headset folds flat and packs away easily in the included case. The super wideband au...