Cisco 4G LTE WWAN EHWIC - AT&T EHWIC-4G-LTE-A 데이터 시트
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EHWIC-4G-LTE-A
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Figure 2. Cisco 4G LTE WWAN EHWIC for WAN
Figure 3. 4G LTE as a primary WAN link
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 nonterrestrial data path such as a 4G LTE WWAN provides enhanced WAN diversity (Figure 2). Cisco 4G
LTE WWAN EHWICs combined with the Cisco integrated services routers offer the capability to automatically
initiate connection over the 4G LTE WWAN when the primary WAN link is unavailable. In addition, you can use
Cisco 4G LTE WWAN EHWICs to provide supplemental bandwidth when the primary WAN link is overloaded.