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I'm new to the 28XX series routers and am interested in exploring several of the new features Cisco offers with it. &nbsp;It seems that the router comes in &quot;bundles&quot; offering things like advanced security, cme, etc. &nbsp;My question is: what setup I should purchase to get the following:<br />
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1) FXO/FXS modules for practicing for the cisco voice certifications.<br />
2) Webvpn connectivity to connect some of the newer cisco ip phones with vpn and to connect via webvpn.<br />
3) CME in order to have a phone system.<br />
4) What do I need to later on upgrade to Unity VM
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I'm new to the 28XX series routers and am interested in exploring several of the new features Cisco offers with it.  It seems that the router comes in "bundles" offering things like advanced security, cme, etc.  My question is: what setup I should purchase to get the following:

1) FXO/FXS modules for practicing for the cisco voice certifications.
2) Webvpn connectivity to connect some of the newer cisco ip phones with vpn and to connect via webvpn.
3) CME in order to have a phone system.
4) What do I need to later on upgrade to Unity VM

Cisco 28XX CME Webpn

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

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.