Cisco Systems 1500 Manual De Usuario

This chapter describes how to connect the optical cables for the
Cisco Metro 1500 series system. It includes the following sections:

Make sure that there is no danger that the cables may inadvertently
be pulled or cause anyone to trip when in use.

Ports connecting to the user use multimode, single-mode, or a
combination of both types of cables depending on the application.
Ports on the MUX or DMX use single-mode cables only.