System Command Reference
Page 384
7950 SR OS Basic System Configuration Guide
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
}]}
no interface-type
Context
config>system>sync-if-timing>bits
Description
This command configures the Building Integrated Timing Source (BITS) timing reference. This command is
not supported on the 7450 ESS-6, 7450 ESS-6v, 7450 ESS-1.
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
Context
config>system>sync-if-timing>ref1
config>system>sync-if-timing>ref2
Description
This command configures the interface type of the BITS timing reference.
This command is only supported on the 7750 SR-c12 (and 7710 SR-c12).
Содержание 7950 XRS Series
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Страница 502: ...Index Page 502 7950 SR OS Basic System Configuration Guide system parameters 252 system time elements 256 timing 294...