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Configuration Options
C-6
3162-A2-GB20-30March 1999
Sync Data Port Configuration Options
Table C-3. Sync Data Port Configuration Options (1 of 5)
Port Type: E530 (Factory 1) V.35 (Factory 2)
E530 V.35 RS449 X.21
Allows selection of the data port interface type.
E530 – Configures the port as an EIA 530A compatible interface. EIA 530A DTEs can
be directly connected to a port connector on the back of the DSU/CSU.
V.35 – Configures the port as a V.35 compatible interface. V.35 DTEs can be connected
to a port connector using an EIA 530A-to-V.35 adapter cable.
RS449 – Configures the port as an RS449 compatible interface. RS449 DTEs can be
connected to a port connector using an EIA 530A-to-RS449 adapter cable.
X.21 – Configures the port as an X.21 compatible interface. X.21 DTEs can be
connected to a port connector using an EIA 530A-to-X.21 adapter cable.
NOTE: If this configuration option is set to X.21, set the Send All Ones
configuration option to RTS or Disable.
Port Base Rate: Nx64
Nx64 Nx56
Allows selection of the base rate for the data port. The data rate for the port is a multiple
(from 1 to 24) of the base rate specified with this configuration option.
Nx64 – Sets the base rate for this port to 64 kbps. The data rate is
N
x64 kbps, where
N
is a number from 1 to 24.
Nx56 – Sets the base rate for this port to 56 kbps. The data rate is
N
x56 kbps, where
N
is a number from 1 to 24.
Transmit Clock Source: Internal
Internal External
Specifies whether the transmitted data for the port is clocked using an internal clock
provided by the DSU/CSU (synchronized to the clock source specified by the clock
source configuration option) or an external clock provided by the DTE connected to the
port. If an external clock is used, it must be synchronized to the same clock source as
the DSU/CSU.
Internal – Indicates the clock is provided internally by the DSU/CSU on the TXC
interchange circuit DB (CCITT 114).
External – Indicates the clock is provided externally by the DTE on the XTXC
interchange circuit DA (CCITT 113). Use this selection if the clock source is set to this
data port.