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This chapter describes how to connect the cables, power the system, and finally, check the LEDs to make sure you installed everything properly. The Cisco MGX 8260 uses the following cable types:
For more information on cables, see "Cable and Connector Reference".
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Caution Use shielded cables with shielded connector hoods for all connections except DC power. |
Cisco provides the following custom adapter and extension cables:
| 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 |
To connect the BITS cable, follow these steps:
The BITS connection is a DS1 or E1 line to the Stratum timing standard in your facility.
Step 2 Connect the other end of the cable to the Stratum timing standard in your facility.
Step 3 If your system has a redundant SCC, repeat steps 1 and 2 for the adjacent SCC.
To connect nonredundant DS3 cables, follow these steps:
Step 2 Connect the RX coaxial cable to the line 1 RX connector on the same card.
Step 3 Repeat steps 1 and 2 for each DS3 line.
To connect DS3 cables to redundant BSCs, follow these steps:
Step 2 Connect the other SMB plug to the line 1 TX connector on the redundant DS3 back card.
Step 3 Connect the adapter's BNC connector to a TX DS3 circuit in your facility.
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Note Choose adjacent BSCs for 1:1 redundancy, as shown in the illustration. |
Step 4 Using another DS3 Y-Adapter, connect an SMB plug to the line 1 RX connector on the DS3 back card.
Step 5 Connect the other SMB plug to the line 1 RX connector on the redundant DS3 back card.
Step 6 Connect the adapter's BNC connector to the corresponding RX DS3 circuit.
Step 7 Repeat steps 1 - 6 for other redundant DS3 lines.
To connect the T1 cables, follow these steps:
Step 2 Tighten the screws at the top and bottom of the 50-pin connector.
Step 3 Support the cable near the rack to keep weight off the connector.
Step 4 Connect the receive T1 cable to the 50-pin connector at the bottom of the NSC back card.
Step 5 Tighten the screws at the top and bottom of the receive 50-pin connector.
Step 6 Repeat steps 1 and 2 for other NSC back cards.
To connect E1 cables, follow these steps:
Step 2 Connect the other end of the RJ-48 cable to a patch panel or other compatible communication equipment.
Step 3 Repeat Steps 1 and 2 for other E1 lines.
This procedure applies to systems that use Fast Ethernet interfaces. If your system uses OC-3 interfaces, skip this procedure.
To connect the Fast Ethernet cables, follow these steps:
Step 2 Snap the other end of the cable into the appropriate communication equipment.
Step 3 Repeat steps 1 and 2 for other Fast Ethernet cables.
Step 4 If your system has a redundant SCC, repeat steps 1 through 3 for the adjacent SCC.
This procedure applies to systems that use OC-3 interfaces. If your system uses Fast Ethernet interfaces, skip this procedure.
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Warning When handling optical cables, observe the manufacturer's bend radius limits. |
To connect the OC-3 cables, follow these steps:
Step 2 Route the optical cable down and to the side of the chassis, observing the minimum bend radius for the cable.
Step 3 Snap the other end of the cable into the appropriate communication equipment.
Step 4 Repeat steps 1 through 3 for other optical cables.
Step 5 If your system has a redundant SCC, repeat steps 1 through 4 for the adjacent SCC.
To connect management console cables:
Step 2 Route the other end of the cable to the front or the chassis for later use.
Step 3 Optionally, connect a DB9 cable between the AUX connector and a modem. A modem supports remote management via a dialup connection. Use a cable with straight-through wiring rather than a crossover modem cable.
To connect an Ethernet cable for system management:
Step 2 Snap the other end of the Ethernet cable to the designated hub or host.
Step 3 If your system has a redundant SCC, repeat steps 3 and 4 for the adjacent SCC.
To connect alarm relay contacts, follow these steps:
Step 2 Connect the DB15 cable to the Alarm connector on the SCC back card.
This procedure explains how to connect and apply DC power to the MGX 8260. Make sure to observe the recommended wire gauge and number of power cables. This procedure specifies two power pairs for each power circuit because the MGX 8260 Media Gateway can draw 45 Amps at -40 Vdc. Choose a power source accordingly.
To connect DC power, follow these steps.
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 the cover off.
Step 3 Before connecting power, check the ground lead between the chassis lugs and a protective ground.
Step 4 Prepare four power cables, two for -48V and two for RTN. Use 14 AWG ST, UL 1015 wire with #8 SNAP SPADES for 16-14 AWG (MOLEX BB-8716-08) for each cable.
Step 5 Connect two return cables to the chassis, one to each RTN terminal on power circuit A; then connect the other ends to the RTN terminals on the primary power panel.
Step 6 Connect two power cables to the chassis, one to each -48V terminal on power circuit A; then connect the other ends to the -48V terminals on the primary power panel.
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Warning All four power terminals must have cables. A single supply and return cable pair will not support a fully-loaded chassis. |
Step 7 Install the power circuit cover. Slide the tab at the top of the cover into the chassis, and then lower the body over the terminals, making sure the power cables exit through the slots in the bottom (see Figure 3-10).
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Caution Make sure the power circuit cover is correctly seated and that the power cables pass freely through the openings at the bottom. Exposed power terminals or damaged insulation pose a safety risk to operations personnel. |
Step 8 Secure the cover with the two captive screws.
Step 9 To install power circuit protection, repeat Steps 3 to 6 for power circuit B, connecting power circuit B cables to a standby DC power panel.
Step 10 Apply DC power, either by switching the DC supply on or replacing fuses.
To verify correct cabling, follow these steps:
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. In a system with redundant cards, the CARD LED changes to green on the active card and yellow on the standby cards. If the CARD LED of any card is red or off, troubleshoot the problem before proceeding.
Posted: Mon Oct 2 22:41:41 PDT 2000
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