Cisco Cisco 4G LTE Enhanced High-Speed WAN Interface Card for Verizon Information Guide
Q&A
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Cisco Multimode G.SHDSL with EFM and ATM
Mode for Cisco Integrated Services Routers
Generation 2
Mode for Cisco Integrated Services Routers
Generation 2
Q. What is the Cisco Multimode Symmetric High-Bit-Rate DSL High-Speed WAN Interface Card?
A. This Enhanced high-speed WAN interface card (EHWIC) is a single-port, 4-pair WAN interface card
offering G.SHDSL-based WAN connectivity using the 802.3ah Ethernet in the First Mile (EFM)-compliant
extended-rate SHDSL EFM (2BASE-TL) technology and ATM mode for modular routers deployed in small to
medium-sized businesses (SMBs) and enterprise branch offices. The symmetric DSL, G.SHDSL is an
accepted worldwide technology standard based on ITU recommendation G.991.2. The G.SHDSL Enhanced
(EHWIC) is designed to transport rate-adaptive symmetrical data across a single copper pair and EFM
bonding with Annexes A, B, F, and G up to 4 x 5.696 Mbps. Please note that EHWIC-4SHDSL-EA is double
wide EHWIC module. Please refer to
http://www.cisco.com/en/US/docs/routers/access/interfaces/ic/hardware/installation/guide/oview_ic.html
to get
an overview of Cisco Interface Cards for Cisco Access Routers.
Q. What is the Cisco 888EA Integrated Services Router?
A. This Cisco Integrated Services Routers Generation 2 (ISR G2) fixed platform has an Multimode G.SHDSL
port, 4 pair with EFM and ATM mode with the same G.SHDSL feature parity as the Cisco Multimode
Symmetric High-Bit-Rate DSL High-Speed WAN Interface Card for the ISR G2 modular platforms.
Q. What is Ethernet in the First Mile?
A. EFM, also known as IEEE 802.3ah, is a collection of protocols specified in
IEEE 802.3
that define
Ethernet
in
access networks
; that is,
first or last mile
.
Q. What is EFM bonding?
A. EFM bonding based on IEEE 802.3ah is the method for bonding multiple DSL pairs for Ethernet transport to
achieve higher data rates.
Q. What annexes do the EHWIC cards (EHWIC-4SHDSL-EA) and Cisco 880 Series Data Routers (C888EA-K9)
support?
A. The G.991.2 standard has the following annexes:
●
Annex A: This annex describes those specifications that are unique to SHDSL systems operating under
conditions such as those typically encountered within the North American network. The clauses in this
annex provide the additions and modifications to the corresponding clauses in the main body.
●
Annex B: This annex describes those specifications that are unique to SHDSL systems operating under
conditions such as those typically encountered within European networks. The clauses in this annex
provide the additions and modifications to the corresponding clauses in the main body.
●
Annex F: The clauses in this annex provide the additions and modifications to the corresponding clauses in
the main body and Annex A for payload data rates up to 5696 kbps.