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Skype is purely home based and uses p2p technology and the disadvantage of this is that it is practically impossible to implement any quality of service which makes it unsuitable for corporate use.<br />
<br />
With VoIP you could eliminate the extra voice line but it depends on how reliable your internet connection is. You need a perfect internet connection between yourselves and the VoIP provider.<br />
Generally I recommend keeping the PRI line for incoming calls and general outgoing calls. Then you can use the internet connection with VoIP for any calls between offices or any locations which are much cheaper over VoIP.<br />
<br />
Cisco and Avavya are good. 3COM do some good equipment also.<br />
I use Asterisk which is an open source PBX running on Linux. It is oviously much cheaper but you do need experience in administering Linux systems and configuring Asterisk.
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We have 3 T1 lines<br />
<br />
two for internet, <br />
One for PRI Voice<br />
<br />
i am looking into VOIP but still a beginner. What are the options for VOIP migration? With that could i eliminate the extra voice line? i was looking at previous posts at ee, seems like Cisco / Avavya products are at enterprise level - Also came across SKYPE - but skype seems to be more home based than enterprise - correct me if i am wrong.<br />
<br />
thanks<br />
rdv
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We have 3 T1 lines

two for internet, 
One for PRI Voice

i am looking into VOIP but still a beginner. What are the options for VOIP migration? With that could i eliminate the extra voice line? i was looking at previous posts at ee, seems like Cisco / Avavya products are at enterprise level - Also came across SKYPE - but skype seems to be more home based than enterprise - correct me if i am wrong.

thanks
rdv

Skype is purely home based and uses p2p technology and the disadvantage of this is that it is practically impossible to implement any quality of service which makes it unsuitable for corporate use.

With VoIP you could eliminate the extra voice line but it depends on how reliable your internet connection is. You need a perfect internet connection between yourselves and the VoIP provider.
Generally I recommend keeping the PRI line for incoming calls and general outgoing calls. Then you can use the internet connection with VoIP for any calls between offices or any locations which are much cheaper over VoIP.

Cisco and Avavya are good. 3COM do some good equipment also.
I use Asterisk which is an open source PBX running on Linux. It is oviously much cheaper but you do need experience in administering Linux systems and configuring Asterisk.

Migration to VOIP System

The term broadband commonly refers to high-speed Internet access that is always on and faster than the traditional dial-up access. Broadband includes several high-speed transmission technologies such as digital subscriber line (DSL), cable, fiber optics, wireless (for which there is a separate topic), satellite and broadband over powerlines (BPL).

Broadband

Network Operations includes asset management, help-desk supervision, security and user policies, infrastructure administration and anything else that affects the operation of your network. Discussions will include those of best practices in platforms, configurations, performance, security and accounting.

Network Operations

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).