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4. Configuration Options
4-28 December 2002 9700-A2-GB20-20
Configuring the User Data or Virtual Router Port
The following user data port and virtual router port interface characteristics are
described in the following sections:
Configuring the CSU/DSU’s Data Port Physical Interface
Configuring Frame Relay on the CSU/DSU’s Data Port
Configuring DLCI Records
Configuring the CSU/DSU’s Data Port Physical Interface
Select Physical from the Data Ports menu to configure the user data port physical
characteristics (see Table 4-13, CSU/DSU Data Port Physical Interface Options).
Main Menu Configuration Data Ports Physical
Data Port Physical Interface Options do not apply to the router.
Table 4-13. CSU/DSU Data Port Physical Interface Options (1 of 2)
Port Type (9788)
Possible Settings: E530, V.35, X.21
Default Setting: V.35
Determines the configuration of the data port.
E530 – The port is configured as an EIA-530-A-compatible DCE. An EIA-530-A-
compatible DTE may be directly connected to the DB25 connector for the port.
V.3 5 – The port is configured as a V.35-compatible DCE. A V.35-compatible DTE may be
connected to the port using a DB25-to-MS34 adapter.
X.21 – The port is configured as an X.21-compatible DCE. An X.21-compatible DTE may
be connected to the port using a DB25-to-DB15 adapter.
Invert Transmit Clock
Possible Settings: Auto, Enable, Disable
Default Setting: Auto
Determines if the FrameSaver unit clock on interchange circuit DB (ITU 114) – Transmit
Signal Element Timing (DCE Source) TXC is phase inverted with respect to the clock
used to time the incoming Transmitted Data (TD).
Auto – The port will check the clock supplied by the DCE on TXC on this port. If
necessary, the port will automatically phase invert the clock with respect to the transmitted
data.
Enable – Phase inverts the TXC clock. Use this setting when long cable lengths between
the FrameSaver unit and the DTE are causing data errors.
Disable – Does not phase invert the TXC clock.