Patton electronic 2621, 2635 manual Case being opened with a screwdriver, Location of DTE/DCE board

Models 2603, 2621, and 2635 Getting Started Guide 3 • Initial Configuration

When the local third party equipment is configured as DTE, the Model 3086 X.21 serial port can be config- ured as DCE, and a regular straight-through cable can then be used. Do the following to configure the X.21 port as a DCE:

1.Open the IPLink’s case by inserting a screwdriver into the slots and twist the screwdriver head slightly. The top half of the case will separate from the lower half of the case (see figure 8). Take caution not to damage any of the PC board mounted components.

Figure 8. Case being opened with a screwdriver

2.Locate the small daughter board on the Model 2621 board to the right of the DB-9 connector (figure 9 shows location of DTE/DCE daughter board).

In this example, the DCE/DTE strap is

X.21 connectorconfigured for DCE because the “DCE” label on the strap is pointed toward the

X.21 connector

Figure 9. Location of DTE/DCE board

3.The DTE/DCE daughter board is installed at the factory with the DTE label and arrows pointing towards the X.21 connector (DTE configuration). To change to DCE configuration, lift the daughter board from the connector, turn it around so that the DCE label an arrows point to the X.21 connector, and place it back on the connector. The X.21 port is now configured as a DCE.

Note When the X.21 port is configured as a DTE, the clocking mode for the port must be set for external clock.

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