Cisco 3200 Series Hardware Reference Manual page 117

Appendix A Smart Serial Port External Seal
Step 7 Apply heat by using a heat gun. Heat the tubing until it is reduced in size and fits snugly over the chassis
protrusion of the smart serial port. Once it is secure, direct the heat toward the other end of the tubing to
shrink it against the cable molding, as shown in Figure A-3.
Figure A-3 Applying Heat to the Heat-Shrink Tubing
Cisco 3200 Series Router Hardware Reference
A-3
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