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I/O modules that support single-mode (intermediate reach or long haul), or multimode
operation through SC full duplex connectors are available. I/O modules that support
APS/MSP are also available.
Figure 6 on page 79 shows the interface stack for OCx/STMx POS interfaces.
Figure 6: Interface Stack for OCx/STMx POS and OC48/STM16 Interfaces
OC48 Line Modules
OC48 line modules pair with OC48 FRAME I/O modules to deliver unchannelized
OC48/STM16 POS operation through one line interface.
The OC48 I/O module supports single-mode (intermediate reach or long haul)
operation through an SC full duplex connector.
The interface stack for the OC48/STM16 interfaces is the same as that for OCx/STMx
POS interfaces (Figure 6 on page 79).
The OC48 line module can be installed in the router's turbo slots, numbered 2 and
4. When the OC48 line module is installed in a turbo slot, it spans slots 2–3 and 4–5.
The bandwidth of slot 3 or slot 5 is used for a line module in slot 2 or slot 4 if that
line module requires the turbo slot.
NOTE: If a line module is installed in slot 3 or slot 5, and the line module in slot 2
or 4 requires bandwidth, the system configures the line module it detects first. The
state of the other line module is displayed in the show version command output as
disabled (cfg error).
OC3/STM1 GE/FE Line Module
The OC3/STM1 GE/FE line module pairs with the OC3-2 GE APS I/O module to deliver
unchannelized OC3/STM1 ATM operation through two line interfaces and Gigabit
Ethernet operation through one line interface.
The OC3-2 GE APS I/O module uses a range of small form-factor pluggable transceivers
(SFPs) to support different optical modes and cabling distances, and accepts up to
three LC-style fiber-optic connectors. You can configure ports 0 and 1 for OC3/STM1
ATM interfaces; port 2 is reserved for a Gigabit Ethernet interface.
Chapter 3: Configuring Unchannelized OCx/STMx Interfaces
Platform Considerations
79
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