Cisco 3G EV-DO WWAN EHWIC - Verizon EHWIC-3G-EVDO-V= Datenbogen
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EHWIC-3G-EVDO-V=
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Figure 1. 3G Wireless WAN EHWICs for Cisco Integrated Services Routers G2
With enhanced data rates and improved latency (road trip time below 100 milliseconds), WWAN services are an
ideal way to supplement traditional wire line services. 3G WWAN data services offered today have average data
rates well in excess of ISDN speeds, with theoretical limits in excess of 21.1 Mbps on the downlink and 5.76 Mbps
on the uplink. The 3G WWAN as a primary link for sites with lower bandwidth requirements and for mobile
applications. The 3G WWAN data services as a cost-effective alternative in areas where broadband services are
either not available or very expensive. Cisco is building on these performance milestones and adding support for
wireless to our wide variety of WAN interface alternatives.
Key Business Benefits
Applications
WAN Backup
Resilient WAN access is a crucial requirement for branch offices connecting to a corporate site or the Internet.
Although DSL, Frame Relay, ISDN, and dialup are common choices for backup if a primary WAN link fails, a non-
terrestrial data path such as a 3G WWAN provides enhanced WAN diversity (Figure 2). Cisco 3G WWAN
EHWICs combined with the Cisco integrated services routers offer the capability to automatically initiate
connection over the 3G WWAN when the primary WAN link is unavailable. In addition, you can use Cisco 3G
WWAN EHWICs to provide supplemental bandwidth when the primary WAN link is overloaded.