Specifications

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PA-T3+ Serial Port Adapter Installation and Configuration
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Chapter 4 Configuring the PA-T3+
Configuring Half-Duplex and Binary Synchronous Communications in Cisco 7200 Series Routers
Step 5 Write the new configuration to NVRAM as follows:
Router# copy running-config startup-config
[OK]
Router#
This completes the procedure for configuring controlled-carrier mode on an EIA/TIA-232 interface. For
additional information on configuring half-duplex operation on low-speed serial interfaces, refer to the
chapter “Configuring Interfaces” of the Configuration Fundamentals Configuration Guide publication.
For more information, see the “Obtaining Documentation” section on page x and the “Obtaining
Technical Assistance” section on page xi.
Note To configure EIA/TIA-232 interfaces for Binary Synchronous (Bisync) operation in Cisco 7200 routers,
refer to the “Block Serial Tunneling (BSTUN)” section of the “Configuring Serial Tunnel (STUN) and
Block Serial Tunnel (BSTUN)” chapter of the Bridging and IBM Networking Configuration Guide.
Setting the Bandwidth
In interface configuration mode, reduce effective bandwidth (range of 22 to 44210 kbps) by entering the
dsu bandwidth configuration subcommand, as in the following example:
router(config-if)# dsu bandwidth 16000
Use the no form of this command to return to the default, 44210.
Note The local port configuration must match the remote port configuration. For example, if you reduce the
effective bandwidth to 16000 on the local port, you must do the same on the remote port.
Defining the DSU Mode
In interface configuration mode, define the DSU interoperability mode by entering the
dsu mode [0|1|2] configuration subcommand, as in the following example:
router(config-if)# dsu mode 1
Use the no form of this command to return to the default, 0.
Note The local port configuration must match the remote port configuration. For example, if you define the
DSU interoperability mode as 1 on the local port, you must do the same on the remote port. You need to
know what type of DSU is at the remote port to find out if it interoperates with the PA-T3+. For T3+
serial interfaces, specify mode 0 for connection from a PA-T3+ to another PA-T3+ or a Digital Link DSU
(DL3100). Specify mode 1 for connection from a PA-T3+ to a Kentrox DSU. Specify mode 2 for
connection from a PA-T3+ to a Larscom DSU.
Also see the “Interoperability Guidelines for PA-T3+ DSUs” section on page 1-3 for information
regarding DSU feature compatibilities.