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Introduction to ETHX-2214-DS3 and ETHX-2224-DS3
The EtherXtend 2200 Series of DS3 Ethernet Access Devices (EADs) allows Carriers,
ISPs and PTTs to deliver Ethernet services to virtually anywhere, using standard
unframed DS3 circuits. These units permit the efficient and reliable delivery of Ethernet
on a single DS3 or on a bonded pair of DS3 circuits. With the ability to provide up to 90
Mbps of symmetric data transport, near native 10/100BT Ethernet speeds can be
achieved to deliver demanding LAN, WAN, and IP-based services to an increasingly
sophisticated generation of small and medium-sized business customers.
The EtherXtend 2200 Series of DS3 EADs are available in two base models:
ETHX-2214-DS3 – Provides one (1) DS3 port
ETHX-2224-DS3 – Provides two (2) DS3 ports
Both models feature an integrated 4-port 10/100 Ethernet switch. On a dual-port device
(ETHX-2224-DS3), the two DS3 ports can be bonded together to provide 90 Mbps data
rates, achieving near native 100Mbps Ethernet speeds.
The loop bonding technology used by the EtherXtend 2200 Series DS3 EADs is the
industry-leading, pre-standards based Net-to-Net (N2N) loop bonding protocol, which
offers automatic, efficient, resilient, and configuration-free deployment with greater total
throughput capacity than a traditional DS3 circuit. Zhone's loop bonded technology
provides automatic load balancing and fail-over for optimum redundancy and data
throughput.
To maximize the total bandwidth available for ethernet traffic, the ETHX-22x4-DS3
devices operate in a DS3 framer-bypass mode (i.e. the ethernet traffic is mapped onto
the entire 44.736 Mbps of each DS3 facility, including any overhead bits normally
associated with M13 or C-bit Parity DS3 framing formats).
NOTE: Only unframed DS3 circuits are supported
The ETHX-22x4-DS3 devices must be connected to unchannelized and
unframed DS3 facilities.
Asynchronous M13 and/or C-Bit DS3 framing formats are not supported on
the ETHX-22x4-DS3 devices. Attempts to connect these devices to anything
other than unframed and unchannelized DS3 facilities will lead to excessive
bit errors and unreliable operation.
The ETHX-22x4-DS3 units utilize the entire 44.736 Mbps DS3 bandwidth for
data transmission. Therefore, if you are leasing DS3 facilities for use with the
ETHX-22x4-DS3 devices, you must verify with your DS3 service provider
that they will provide access to fully unframed DS3 facilities. Furthermore,
they must also guarantee that any intermediary DS3 multiplexing equipment
they use for end-to-end connectivity will regenerate the entire 44.736 Mbps
of bandwidth without modifying or omitting any of the bits typically associated
with overhead in framed DS3 facilities.
