Alcatel-Lucent 7450 Basic System Configuration Manual page 399

The bits command subtree is only available on the 7450 ESS-7, 7450 ESS-12, 7750 SR-7, 7750 SR-
12, 7750 SR-12e, 7750 SR-c4, 7950 XRS-20, 7950 XRS-40, 7950 XRS-16c, 7750 SR-a4, 7750 SR-
a8, 7750 SR-1e, 7750 SR-2e, and 7750 SR-3e.
Default disabled
commit
Syntax commit
Context config>system>sync-if-timing
Description This command saves changes made to the system synchronous interface timing configuration.
Default
No default
interface-type
Syntax interface-type {ds1 [{esf | sf}] | e1 [{pcm30crc | pcm31crc}] | 2048khz-g703}
no 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
Parameters
ds1 esf — Specifies Extended Super Frame (ESF). This is a framing type used on DS1 circuits
ds1 sf — Specifies Super Frame (SF), also called D4 framing. This is a common framing type
e1 pcm30crc — Specifies the pulse code modulation (PCM) type. PCM30CRC uses PCM to
e1 pcm31crc — Specifies the pulse code modulation (PCM) type. PCM31CRC uses PCM to
2048khz-g703 — Specifies the 2048 kHz synchronization interface (T12) of ITU-T G.703. This
Basic System Configuration Guide
that consists of 24 192-bit frames, The 193rd bit provides timing and other functions.
used on DS1 circuits. SF consists of 12 192-bit frames. The 193rd bit provides error checking
and other functions. ESF supersedes SF.
separate the signal into 30 user channels with CRC protection.
separate the signal into 31 user channels with CRC protection.
parameter is only available on the 7450 ESS-7, 7450 ESS-12, 7750 SR-7, and 7750 SR-12
when there is a CPM5 or later installed. It is also available on the 7750 SR-12e, 7750 SR-a4,
7750 SR-a8, 7750 SR-1e, 7750 SR-2e, and 7750 SR-3e.
System Management
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