Cabling and Specifications

Always connect from transmit (TX) to receive (RX) when connecting GBICs to other equipment:

Connect GBIC TX to equipment RX

Connect GBIC RX to equipment TX

Optical transceivers—such as the Cisco CWDM GBICs—have a maximum optical receive power, above which damage might occur to the receive diode. The incoming power level might be too high if the fiber lacks sufficient attenuation, which might occur in a short run of fiber (less than approximately 25 km). Attenuators are used to lower the incoming optical signal below the maximum optical receive power of the Cisco CWDM GBIC (–7 dB).

When the length of the fiber-optic link is less than 15.5 miles (25 km), you must insert a 10-dB inline optical attenuator (Cisco product number AT-10DB-SC=) between the fiber-optic network and the receiving port on the Cisco CWDM GBIC at each end of the link to ensure that the maximum receive power is always less than –7 dBm.

Gigabit Ethernet SFP Modules

The Gigabit Ethernet laser optical transceiver module is a field-replaceable small form-factor pluggable (SFP) module that plugs into the receptacle on the Ethernet port adapter (EPA) located on the Modular Ethernet line card and provides the Gigabit Ethernet optical interface. (See Figure 35.) The module has two optical interfaces—laser transmit (TX) and laser receive (RX)—and an electrical interface (to the line card). The 4-Port Gigabit Ethernet ISE, 10-Port 1-Gigabit Ethernet, and Modular Gigabit Ethernet line cards use SFP modules.

Figure 35 SFP Module and Fiber-Optic Cable

CSA ID

PA

-

0 PA

- PA1

- 2

ACTIVE

 

LINK

0

RX

PKT

 

E P A

1

- 3 G E / S X / L H -

2

L C

 

 

CT

 

 

L I

 

 

N K

0

 

RX

 

PKT

 

2

E P

1

 

A

 

- 3 G E / S X / L H -

2

3

L C

 

 

 

1Component side of line card

2Top surface of SFP module

1

98895

3Card carrier side of line card

Cisco XR 12000 Series Router Ethernet Line Card Installation

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OL-7861-01

 

 

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Cisco Systems XR 12000 Series specifications Gigabit Ethernet SFP Modules, Card carrier side of line card

XR 12000 Series specifications

The Cisco Systems XR 12000 Series routers are designed to meet the demands of modern networking environments, ensuring high performance, scalability, and reliability for service providers and large enterprises. This series is engineered to deliver advanced features that facilitate a range of applications, including core routing, edge services, and data center interconnect.

One of the main features of the XR 12000 Series is its advanced routing capabilities. These routers utilize the Cisco IOS XR software architecture, which provides a modular and distributed operating system. This architecture enhances system reliability as individual processes can be restarted independently without affecting overall system operations. As a result, service providers can achieve higher uptime and enhanced service continuity.

The XR 12000 Series supports a robust set of technologies that enable efficient data handling and transport. Notably, the series includes support for Multiprotocol Label Switching (MPLS), which enhances traffic engineering, distributed bandwidth management, and Quality of Service (QoS) capabilities. This makes the XR 12000 a preferred choice for operators looking to optimize their network performance under increasing traffic loads.

Furthermore, the XR 12000 Series excels in scalability. With a flexible modular design, operators can customize their systems to fit specific needs by adding additional line cards or service modules. These enhancements enable operators to scale both up and down based on fluctuating demands, accommodating numerous high-bandwidth applications such as video streaming, cloud services, and IoT.

Security is another critical characteristic of the XR 12000 routers. Built-in cybersecurity features, including secure boot, strong encryption, and integrity checks, protect against unauthorized access and ensure data integrity. Coupled with advanced monitoring and logging capabilities, these routers can help operators maintain robust security postures.

Additionally, the XR 12000 Series is designed to facilitate seamless integration with existing network infrastructures. The routers support various protocols and interfaces, which ensure interoperability with legacy systems and enhance overall network efficiency. This flexibility allows service providers to future-proof their investments while adapting to evolving technological landscapes.

In summary, the Cisco XR 12000 Series routers stand out for their advanced routing capabilities, scalability, robust security features, and compatibility with modern and legacy network infrastructures. These attributes make them an ideal choice for organizations seeking to enhance their networking capabilities in a rapidly changing digital environment.