DIP Switch
The EVC-3101 provides 4 selective transmission modes. By switching the transmission modes, you can
obtain a best transmission mode to suit with phone line quality or distance of connectivity. The following is
the summary table of transmission setting, bandwidth and distance extensibility tested for AWG 24
(0.5mm) twisted-pair without noise and cross talk.
DIP-1
DIP-2
DIP-3
DIP-4
Mode
Transmission
Band Profile
SNR Margin
OFF
CO
G.INP
Asymmetric
12dB
ON (default)
CPE
Interleave
Symmetric
8dB
DIP-1: Mode (CO / CPE)
CO (Central Office)
The Master device mode, usually the CO device, is located at the data
center of ISP or enterprise to link to the backbone.
CPE (Customer
Premises
Equipment)
The Slave device mode, usually the CPE device, is located at branch office,
home or remote side as the long reach data receiver. The CPE can be
connected to the PC, IP camera or wireless access point or other network
devices.
When the EVC-3101 operates in CPE mode, DIP switches 2, 3, and 4 are without
function.
DIP-2: Transmission (G.INP and Interleave mode)
G.INP
Method of protection against bursts from other devices or lines to impact
your xDSL line.
Interleave
Method of error correction used on xDSL line. Interleave requires additional
latency to improve resilience to burst of error.
DIP-3: Band Profile (Asymmetric/Symmetric)
Asymmetric
Asymmetric mode provides more bandwidth than the other side.
This mode provides the highest bandwidth in short range.
Symmetric
With G.997 band plan supported, symmetric mode can provide almost the
same rate of downstream and upstream.
DIP-4: SNR (Signal Noise Ratio) Margin
When the SNR margin is selected, the system provides 12dB/8dB SNR margin for across all usable loop
lengths. Better channel noise protection is made with the higher SNR margin.
By default, the four DIP switches, set at the “ON” position, are operated as “CPE”. For
operating as “CO”, please turn DIP 1 Switch to the “OFF” position. Then adjust the other
DIP switches accordingly to fulfill different network application demands.
