Comtrend Corporation CT-510, Руководство пользователя

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4.4 ADSL Characteristics Parameters
In the MAIN/CONF/ADSL menu, the administrator can set up the system
chipset’s characteristics, such as downstream framing, scramble, echo
cancellation, and bit swapping functions. Another menu located at the
directory of MAIN/MON/STATUS also displays these settings for monitoring
purposes only.
Field Parameter
Mode 0-Mode 3 (factory default: Mode 3)
There are four modes supporting either full overhead
framing or reduced overhead framing. Each mode is
described below.
Mode 0 : Full overhead framing with asynchronous
bit-to-modem timing (i.e. enabled synchronization
control mechanism)
Mode 1 : Full overhead framing with synchronous
bit-to-modem timing (i.e. disabled synchronization
control mechanism)
Mode 2 : Reduced overhead framing with separate fast
and sync byte in fast and interleaved latency buffer
respectively (i.e. 64 kbit/s framing overhead)
Downstream framing
Mode 3 : Reduced overhead framing with merged fast
and sync byte, using either the fast or interleaved
latency buffer respectively (i.e. 32 kbit/s framing
overhead)
Scramble Disabled/Enabled (factory default: Enabled)
Echo cancellation Disabled/Enabled (factory default: Disabled)
Trellis coded Modulation Disabled/Enabled (factory default: Disabled)
Bit swapping Mode 0, Mode 1, Mode 2, Mode 3 (factory default:
Mode3)