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Experts,<br />
I need some help as my VoIP knowledge is very limited. I just talked to a Cisco reseller for a Cisco 2901 router for voice and I am a bit confused about the call controller concept. I have 3 sites and a couple of analog devices connected to the router. So I guess the router is considered as the gateway. The parts that I got as the following:<br />
- Cisco 2901<br />
- 1 PVDM3<br />
- 1 VIC3-2FXS <br />
- 1 VIC2-2FXO<br />
<br />
My client is planning to use the dial-peer pots for the analog devices and dial-peer VoIP to connect to the remote site. My ISP will give me a 9mb ethernet hand-off to their MPLS cloud. The part that I am confused about is the rep said that the Cisco parts above will just allow VoIP traffic to go through and I will need a call controller to manage the dial plan. I thought that if I configured the dial-peer, this should take care of the dialing and the DSP will take care of the coding/decoding.
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Experts,
I need some help as my VoIP knowledge is very limited. I just talked to a Cisco reseller for a Cisco 2901 router for voice and I am a bit confused about the call controller concept. I have 3 sites and a couple of analog devices connected to the router. So I guess the router is considered as the gateway. The parts that I got as the following:
- Cisco 2901
- 1 PVDM3
- 1 VIC3-2FXS 
- 1 VIC2-2FXO

My client is planning to use the dial-peer pots for the analog devices and dial-peer VoIP to connect to the remote site. My ISP will give me a 9mb ethernet hand-off to their MPLS cloud. The part that I am confused about is the rep said that the Cisco parts above will just allow VoIP traffic to go through and I will need a call controller to manage the dial plan. I thought that if I configured the dial-peer, this should take care of the dialing and the DSP will take care of the coding/decoding.

VoIP call control

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).

Voice Over IP

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.