Cisco 3725 Hardware Installation Guide - Page 61
Cisco 3725 - PRI Dial Bundle Router Manual
UPC - 746320810911
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Chapter 3 Installing the Router Figure 3-17 DC Wire Routing and Attachment for Cisco 3725 Power Connections LP AL CD 88035 BEFORE INSTALLATION DSU 56K Plastic cover SEE MANUAL BEFORE INSTALLATION Cable tie From DC power source Approved Scenarios and Scenarios Not Approved for Dual DC Power Supply Configuration in Cisco 3725 Routers You can connect a single DC power source to either the A input or the B input. If there are dual power sources, connect one source to the A input and one source to the B input. Both sources must be the same polarity (with respect to ground) and voltage (within 0.25 volts). Do not connect -DC grounded and +DC grounded dual sources to a Cisco 3725 router. Caution Dual sources with opposite-polarity grounding can damage equipment. In Figure 3-18, either the positive source terminal or the negative source terminal is tied to ground. Figure 3-18 Connecting to One Source Only-Source A or Source B A- A- + + A+ A+ B+ B+ B- B- 127037 OL-2180-08 Cisco 3700 Series Routers Hardware Installation Guide 3-15