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Cisco 7000 Series - Page 131

Cisco 7000 Series
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Installing the Router 3-19
Connecting Interface Cables
Figure 3-15 Dual Attach Station (DAS), Single-Mode Fiber Network Connections
Multimode—Each of the integrated transmit/receive multimode interface cables attaches to both
the primary and secondary ring; each one receives the signal from one ring and transmits to the
other ring. (See Figure 3-16.) To help avoid confusion, use the receive label on the cable MIC
connector as a key and connect the cables to the FIP ports as follows:
Connect the cable coming in from the primary ring to the PHYA receive port. This also
connects the signal going out to the secondary ring to the PHYA transmit port.
Connect the cable coming in from the secondary ring to the PHY B receive port. This also
connects the signal going out to the primary ring to the PHY B transmit port.
Figure 3-16 Dual Attach Station (DAS), Multimode Fiber Network Connections
Mixed mode—Follow the cabling guidelines described previously to connect the multimode and
single-mode interface cables. Figure 3-17 shows that the primary ring signal is received on the
multimode PHYA receive port and transmitted from the single-mode PHY B transmit port. Your
configuration may be the opposite, with multimode on PHY B and single-mode on PHYA.
Connect the cables to the FIP ports as follows:
Connect the cable coming in from the primary ring to the PHYA receive port, and connect
the signal going out to the secondary ring to the PHYA transmit port.
Connect the cable coming in from the secondary ring to the PHY B receive port. This also
connects the signal going out to the primary ring to the PHY B transmit port.
TX RX TX RX
PHY B PHY A
H2808
To primary ring
From secondary ring
To secondary ring
From primary ring
IP
Single-mode,
dual attachment.
Use four single-mode
cables for a dual
attachment connection.
FC connectors (4)
TX RX
PHY B PHY A
TX RX
H2809
To primary ring
From secondary ring
FIP
Multimode,
dual attachment.
Use two multimode
cables for a dual
attachment connection.
MIC MIC
From primary ring
To secondary ring

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