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Configuration Options
4-19
9820-A2-GB20-20
June 2000
Configuring the Physical Interfaces
Characteristics for the following physical interfaces can be configured:
H Network Data Port Physical Interface Options
H User Data Port Physical Interface Options
Configuring the Network Data Port
Select Physical to display or change the physical configuration options for the
port being used as the network interface (see Table 4-5).
Main Menu
→
Configuration
→
Network
→
Physical
The network data port physical interface acts as a DTE. The network interface
automatically detects the rate offered by the external NTU, CSU/DSU, or inverse
multiplexer.
Table 4-5. Network Data Port Physical Interface Options (1 of 2)
Port Type
Possible Settings: E530, V.35, X.21
Default Setting: V.35
Selects the type of port to be used for the network data port.
Display Conditions
– This option does not appear for Model 9820-45M, for which the
port type is HSSI.
E530 – The port is configured as an EIA-530-A-compatible DTE. An EIA-530 compatible
DCE can be directly connected to the DB25 connector for this port on the rear of the
FrameSaver unit.
V.35 – The port is configured as a V.35-compatible DTE. A V.35-compatible DCE can be
connected to the DB25 connector for this port using an adapter cable on the rear of the
FrameSaver unit.
X.21 – The port is configured as a V.11/X.21-compatible DTE. A V.11/X.21-compatible
DCE can be connected to the DB25 connector for this port using an adapter cable on
the rear of the FrameSaver unit.
Invert Internal Clock
Possible Settings: Enable, Disable
Default Setting: Disable
Specifies whether the internal clock (used for timing data transmitted to the DCE) will be
phase-inverted with respect to the clock received at the interface. This option is useful
when long cable lengths between the FrameSaver device and the DCE are causing
errors.
Display Conditions
– This option does not appear for Model 9820-45M.
Enable – The internal clock used to transmit data to the DCE is phase inverted with
respect to the clock supplied by the DCE to this port.
Disable – The internal clock is not inverted (normal).