Alcatel-Lucent 7750 SR OS Basic

System Synchronization Configuration Commands
Page 372 7750 SR OS Basic System Configuration Guide
commit
Syntax commit
Context config>system>sync-if-timing
Description This command is required in order to save the changes made to the system synchronous interface
timing configuration.
Default No default
interface-type
Syntax interface-type {ds1 [{esf | sf}] | e1 [{pcm30crc | pcm31crc}]}
no interface-type
Context config>system>sync-if-timing>ref1
config>system>sync-if-timing>ref2
Description This command configures the Building Integrated Timing Source (BITS) timing reference.
The no form of the command reverts to the default configuration.
Default ds1 esf
Parameters ds1 esf — Specifies Extended Super Frame (ESF). This is a framing type used on DS1 circuits that
consists of 24 192-bit frames, The 193rd bit provides timing and other functions.
ds1 sf — Specifies Super Frame (SF), also called D4 framing. This is a common framing type used
on DS1 circuits. SF consists of 12 192-bit frames. The 193rd bit provides error checking and
other functions. ESF supersedes SF.
e1 pcm30crc — Specifies the pulse code modulation (PCM) type. PCM30CRC uses PCM to
separate the signal into 30 user channels with CRC protection.
e1 pcm31crc — Specifies the pulse code modulation (PCM) type. PCM31CRC uses PCM to
separate the signal into 31 user channels with CRC protection.
bits-interface-type
Syntax bits-interface-type {ds1 [{esf | sf}] | e1 [{pcm30crc | pcm31crc}]}
no bits-interface-type
Context config>system>sync-if-timing>bits
Description This command configures the Building Integrated Timing Source (BITS) timing reference.
The no form of the command reverts to the default configuration.
Default ds1 esf