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Maxim > Design Support > Technical Documents > Application Notes > T/E Carrier and Packetized > APP 4124
Keywords: EoPDH, Ethernet, Ethernet over PDH, Carrier Ethernet, Demarcation, EoS, Ethernet Mapper,
WAN, Ethernet over E1, Ethernet over T1, EoP
APPLICATION NOTE 4124
DS33X162 Product Family FAQ
By: Arthur Harvey, Business Manager, Ethernet Products
Nov 20, 2007
Abstract: This application note addresses frequently asked questions (FAQs) about the DS33X162 family
of EoPDH Ethernet mapping products. The DS33X162 product family is used in carrier Ethernet,
Ethernet demarcation, Ethernet access, MSPP, DSLAM, ROADM, microwave radio, WAN router, and
Ethernet aggregation applications. They support GFP, VCAT, and LCAS protocols for aggregating PDH
links for Ethernet service delivery.
Application Questions
Which device should I choose for my application?
What is an encapsulator/decapsulator?
I need to support EVCs with my equipment. How are those different from VCGs?
What is EoPDH and how is it different from DSL?
What is the difference between HDLC and GFP encapsulation?
Can the DS33X161/DS33X162 transmit data to 16 remote nodes in 16 different locations?
If a DS33X162 is used to connect to four different remote nodes, is the traffic-forwarding mechanism the
same as if I used a cheap 4-port Ethernet switch?
Can the DS33X162 product family connect to the DS33R41 or DS33Z41?
Can the DS33X162 product family connect to the DS33Z11, DS33R11, or DS33Z44?
Is an external framer and LIU required to use devices in the DS33X162 product family?
Why must a multiframe sync be provided in most cases?
What frame latency is added by the device?
What Ethernet flow control is supported?
Should I use Ethernet flow control in my application?
Can I limit the amount of bandwidth that I provide to the Ethernet interface?
Can I use this device in a "drop and continue" application?
Hardware Design Questions
Is there a reference design available?
What power-supply decoupling should be used?
Are there special layout requirements for the DDR SDRAM interface bus?
Software Design Questions
How much processor involvement is required for data to flow?
What does the device do to WAN insertion frames prior to transmission?
Could you provide an example WAN insertion frame?
Could you provide an example LAN insertion frame?
How can this device be used for Ethernet OAM?
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