Alcatel-Lucent 7710 SR SONET, Руководство по настройке

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TDM Commands
Page 290 7710 SR OS Interface Configuration Guide
Parameters
loop-timed — The link recovers the clock from the received data stream.
node-timed — The link uses the internal clock when transmitting data.
adaptive — The clock is adaptively recovered from the rate at which data is received and not from the
physical layer. Adaptive timing is only supported on ds1 and e1 channels.
differential — The clock is recovered from differential RTP timestamp header.
crc
Syntax crc { 16 | 32 }
Context config>port>tdm>ds1>channel-group
config>port>tdm>ds3
config>port>tdm>e1>channel-group
config>port>tdm>e3
Description
This command configures the precision of the cyclic redundancy check (CRC).
Default
16 for non-ATM channel groups configured under DS-1, E-1 and for non-ATM E-3 and DS-3 channel/ports.
32 for ATM channel-groups configured under DS-1 and E-1, and for ATM E-3 and DS-3 channels/ports. The
default cannot be changed.
Parameters 16 — Use 16 bit checksum for the associated port/channel.
32 — Use 32 bit checksum for the associated port/channel.
down-count
Syntax down-count down-count
no down-count
Context config>port>sonet-sdh>path>cisco-hdlc
TDM DS1/E1 LoopTimed Default
Channelized OC-12 Yes loop-timed
Channelized OC-3 Yes loop-timed
Channelized DS3/E3 Yes loop-timed
Channelized ASAP OC-12 Yes loop-timed
Channelized ASAP OC-3 Yes loop-timed
Channelized ASAP DS3/E3 Yes loop-timed
CES OC-3 Yes loop-timed