Connecting the Cables

Connecting the BITS Cable

Connecting DS3 Cables

Connecting Management Ethernet Cables

Applying DC Power

Verifying LED Indications

Connecting the Cables

This chapter describes how to connect the cables, power the system, and check the LEDs to make sure that you installed everything properly. For the solution this guide describes, connect the following cables:

BITS---Twisted pair for the timing source
DS3---Coaxial cables for the broadband interface (see Table 3-1)
10BaseT---STP cable terminated with RJ-45 connectors for the management interface
EIA-232--- DB-9 cable for the console management interface
DC Power---14 AWG ST, UL 1015 wires for power, return, and safety ground

Caution Use shielded cables with shielded connector hoods for all connections except DC power.

Cisco provides the following custom cable options:

Table 3-1: Cable Options

Cisco Part Number Description

CAB-5698-6

T3/E3 SMB female to SMB female, 6 ft

CAB-T3E3-PL-AD

T3/E3 SMB female to BNC female, 6 ft

BNCM-BNCM-25

T3/E3 BNC male to BNC male, 25 ft

CAB-T3E3-PL-Y

T3/E3 SMB female to `Y' BNC female 1-ft redundancy cable

Cisco Part Number	Description
CAB-5698-6	T3/E3 SMB female to SMB female, 6 ft
CAB-T3E3-PL-AD	T3/E3 SMB female to BNC female, 6 ft
BNCM-BNCM-25	T3/E3 BNC male to BNC male, 25 ft
CAB-T3E3-PL-Y	T3/E3 SMB female to `Y' BNC female 1-ft redundancy cable

Connecting the BITS Cable

To connect the BITS cable, follow these steps:

Step 1 From the rear of the unit, connect the BITS cable to the SCC in slot 9 (see Figure 3-1).

The BITS connection is a DS1 line to the Stratum timing standard in your facility.

Figure 3-1: Connecting the BITS Cable

Step 2 Connect the other end of the cable to the Stratum timing standard in your facility. Stratum level 3 is compatible with the Cisco MGX 8260 Media Gateway.

Step 3 Connect the other end of the second cable to the Stratum timing standard in your facility.

Connecting DS3 Cables

To connect the DS3 cables, follow these steps:

Step 1 Connect the TX coaxial cable to the line 1 TX connector on the DS3 back card in slot 11 (see Figure 3-2).

Figure 3-2: Connecting DS3 Cables

Step 2 Connect the RX coaxial cable to the line 1 RX connector on the DS3 back card in slot 11.

Step 3 Repeat Steps 1 and 2 for other DS3 lines on cards in slots 11 and 13.

To connect DS3 cables to redundant cards, follow these steps:

Step 1 Using a DS3 Y-Adapter, connect one of the SMB plugs to the line 1 TX connector on the DS3 back card in slot 15 (see Figure 3-2).

Step 2 Connect the other SMB plug to the line 1 TX connector on the DS3 back card in slot 16.

Step 3 Connect the adapter's BNC connector to the TX DS3 circuit in your facility.

Step 4 Using another DS3 Y-Adapter, connect one of the SMB plugs to the line 1 RX connector on the DS3 back card in slot 15.

Step 5 Connect the other SMB plug to the line 1 RX connector on the DS3 back card in slot 16.

Step 6 Connect the adapter's BNC connector to the RX DS3 circuit in your facility.

Step 7 Repeat Step 1 through Setp 6 for other lines to the redundant BSC pair in slots 15 and 16.

Connecting Management Ethernet Cables

To connect system management cables:

Step 1 Connect a DB9 cable at the SCC console port and route it to the front for system initialization.

Step 2 Connect an Ethernet cable between the Management Port of the SCC in slot 9 and one of the solution's VLANs (see Figure 3-3).

Figure 3-3: Connecting the Management Ethernet Cable

Step 3 If your system uses redundant control networks, connect a second Ethernet cable between the Management Port of the SCC in slot 10 and the other solution VLAN.

Applying DC Power

To connect DC power, follow these steps:

Step 1 Disable DC power from its source. If you are using a separate DC power supply, open the breakers. If you are using a DC power panel, pull the fuses for the new power circuits. Make sure that you disable the power source for both power circuits, A and B.

Step 2 If necessary, remove the power circuit cover from power terminals A and set it aside. To remove the cover, loosen the two captive screws and lift off the cover.

Step 3 At the rear of the chassis, connect -48 VDC to one of the two -48 VDC terminals for the power circuit (see Figure 3-4). Use 14 AWG ST, UL 1015 wire with #8 SNAP SPADES for 16-14 AWG (MOLEX BB-8716-08).

Step 4 Connect a second power cable to the adjacent -48 VDC power terminal.

Figure 3-4: Connecting DC Power

Step 5 Connect a power-return cable to one of the two RTN terminals for the power circuit. Use 14 AWG ST, UL 1015 wire with #8 SNAP SPADES for 16-14 AWG (MOLEX BB-8716-08).

Step 6 Connect a second power-return cable to the adjacent RTN power terminal.

Step 7 Install the power-circuit cover. Slide the tab at the top of the cover into the chassis and lower the body over the terminals, making sure that the power cables exit through the slots in the bottom (see Figure 3-5).

Caution Make sure that the power circuit cover is correctly seated and the power cables pass freely through the openings at the bottom. Exposed power terminals or damaged insulation pose a safety risk to operations personnel.

Figure 3-5: Installing the Power Circuit Cover

Step 8 Secure the cover with the two captive screws.

Step 9 To install power circuit protection, repeat Step 2 through Step 8 for power circuit B; then connect the cables for power circuit B to a standby DC supply or the secondary power bus.

Step 10 Apply DC power, either by switching the DC supply on or replacing fuses.

Verifying LED Indications

To verify correct DC wiring, follow these steps:

Step 1 Verify that the PWR A indicators on the SCCs are on (see Figure 3-6).

Figure 3-6: Power LEDs

Step 2 If you are using power redundancy, verify that the PWR B LED is on.

Step 3 After a startup period, the CARD LED on each card should change to yellow or green. If the CARD LED of any card is red or off, troubleshoot the problem before proceeding.

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