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Field Name
Description
Select DSL Latency
Select the level of DSL latency. Options are:
If you are not certain which method is best, you can select both.
Select DSL Link Type
Select the linking protocol. EoA is the most popular with PPPoA a close second (used
with many legacy ISPs). Options are:
Encapsulation Mode
Select whether multiple protocols or only one protocol is carried per PVC (Permanent
Virtual Circuit). Options are:
Service Category
Select the bit rate protocol. Options are:
Minimum Cell Rate
Minimum allowable rate (cells per second) at which cells can be sent on a ATM net-
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Path0 Fast: No error correction and can provide lower latency on error free
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lines.
Path1 Interleaved: Error checking that provides error free data which increases
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latency.
EoA: Ethernet over ATM.
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PPPoA: Point-to-Point Protocol over ATM.
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IPoA: Internet Protocol over ATM.
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LLC/ENCAPSULATION: (Available for PPOA only) Logical Link Control (LLC)
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encapsulation protocols used with multiple PVCs
LLC/SNAP-BRIDGING: LLC used to carry multiple protocols in a single PVC.
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LLC/SNAP-ROUTING: (Available for IPoA only) LLC used to carry one protocol
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per PVC.
VC/MUX: Virtual Circuit Multiplexer creates a virtual connection used to carry
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one protocol per PVC.
UBR without PCR: Unspecified Bit Rate with no Peak Cell Rate, flow control or
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time synchronization between the traffic source and destination. Commonly
used with applications that can tolerate data / packet loss.
UBR with PCR: Same as above but with a Peak Cell Rate.
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CBR: Constant Bit Rate relies on timing synchronization to make the network
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traffic predictable. Used commonly in Video and Audio traffic network applic-
ations.
Non Realtime VBR: Non Realtime Variable Bit Rate used for connections that
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transport traffic at a Variable Rate. This category requires a guaranteed band-
width and latency. It does not rely on timing synchronization between the des-
tination and source.
Realtime VBR: Realtime Variable Bit Rate. Same as the above option but relies
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on timing and synchronization between the destination and source. This cat-
egory is commonly used in networks with compressed video traffic.
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