Configuration Commands
Page 408 7750 SR OS Interface Configuration Guide
Default no feac-loop-respond
framing (DS-1)
Syntax framing {esf | sf | ds1-unframed}
Context config>port>>tdm>ds1
Description This command specifies the DS-1 framing to be used with the associated channel.
Default DS1: esf
Parameters esf — Configures the DS-1 port for extended super frame framing.
sf — Configures the DS-1 port for super frame framing.
ds1-unframed — Specifies ds-1 unframed (G.703) mode for DS-1 interfaces. This parameter allows
the configuration of an unstructured DS-1 channel on a CES MDA. In G.704, timeslot 0 is used
to carry timing information by a service provider, thus, only 31 slots are made available to the
end user. In G.703, all 32 time slots are available to the end user. Timing is provided by the end
user. When an e1-unframed channel is shutdown, it sends the AIS pattern to the far-end DS-1
which does not react. The operational status remains up and no alarms are generated while the
near-end (shutdown) is operationally down. This is normal behavior since the G.703 option does
not have framing. G.703 framing is only applicable for FR, PPP, and C-HDLC encapsulations.
framing (E-1)
Syntax framing {no-crc-g704 | g704 | e1-unframed}
Context config>port>tdm>e1
Description This command specifies the E-1 framing to be used with the associated channel .
Default g704
Parameters g704 — Configure the E-1 port for G.704 framing.
no-crc-g70 — Configures the E-1 for G.704 with no CRC4.
e1-unframed — Specifies E-1 unframed (G.703) mode for E-1 interfaces. This parameter also
allows the configuration of an unstructured E-1 channel on an ASAP or CES MDA. In G.704,
timeslot 0 is used to carry timing information by a service provider, thus, only 31 slots are made
available to the end user. In G.703, all 32 time slots are available to the end user. Timing is
provided by the end user. When an e1-unframed channel is shutdown, it sends the AIS pattern to
the far-end E-1 which does not react. The operational status remains up and no alarms are
generated while the near-end (shutdown) is operationally down. This is normal behavior since
the G.703 option does not have framing. G.703 framing is only applicable for FR, PPP, and
CHDLC and CEM encapsulations.
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