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Cisco ONS 15200 Series DWDM Systems

Cisco ONS 15216 Dispersion Compensator Unit

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Product Overview

As metropolitan (metro) transport networks grow from 2.5-generation (2.5G) services to 10G and eventually 40G, the underlying optical systems need to compensate for the lower chromatic dispersion tolerances on the 10G and 40G interfaces. In optical networks, the dispersion compensation unit (DCU) compensates for accumulated chromatic dispersion effect in fiber. It provides a flexible solution for accumulated chromatic dispersion without dropping and regenerating the wavelengths on the link, a process that would otherwise be necessary when accumulated chromatic dispersion exceeds the maximum allowed dispersion tolerance. To provide effective compensation, the DCU is designed to operate over the entire band from 1525 to1565 nm.

Features and Benefits

The Cisco ONS 15216 Dispersion Compensator Shelf (Figure 1) is a passive mechanical housing that is 1 rack unit (1RU) high and fits in a 19- or 23-inch rack or bay.

Figure 1. Cisco ONS 15216 Dispersion Compensator Shelf

The Cisco ONS 15216 Dispersion Compensator Modules (Figure 2) can be installed in the dispersion compensator shelf in the following configurations:

• The first slot in the shelf is used for east-to-west traffic and the other slot for west-to-east traffic (Figure 3).

• The first slot in the shelf is used for west-to-east traffic and the other slot for east-to-west traffic (Figure 3).

• Both slots can be cascaded together east-to-west (the output of the first module in the first slot is connected to the input of the second module in the second slot). This configuration provides higher chromatic dispersion compensation than an individual module can provide (Figure 4).

• Both slots can be cascaded together from west to east (the output of the first module in the first slot is connected to the input of the second module in the second slot). This configuration provides higher chromatic dispersion compensation than an individual module can provide (Figure 4).

Figure 2. Cisco ONS 15216 Dispersion Compensation Unit

Figure 3. Single-Shelf DCU Application East-to-West and West-to-East [Note: AMP stands for Amplifier in the above figure]

Figure 4. Cascaded DCU Shelf per Direction [Note AMP stands for Amplifier in the above figure]

Figure 5. Example of DCU Placed Between Wavelength Selective Switch (WSS) and Amplifier

Product Specifications

Tables 1 through 3 give specifications of the dispersion compensation unit.

Table 1. Optical Specifications

Band

Part Number

Compen-sation Level (ps/nm)

Maximum IL (dB)

Maximum Polari-zation Mode Dispersion (PMD) (ps)

Maximum Polarization Dependent Loss (PDL) (dB)

Maximum Optical Return Loss (ORL) (dB)

Maximum Length (km)

Reference Wave-length (nm)

Relative Disper-sion Slop (nm)

Wavelength Range (nm)

C-band

15216-DCU-100=

100

2.1

< 1 ps

< 0.1

> 45

0.95

1545.32

0.0037-1

1525-1565

 

15216-DCU-350=

350

3.0

< 1 ps

< 0.1

> 45

3.33

1545.32

0.0037

1525-1565

 

15216-DCU-450=

450

3.5

< 1 ps

< 0.1

> 45

4.28

1545.32

0.0037

1525-1565

 

15216-DCU-550=

550

3.9

< 1 ps

< 0.1

> 45

5.24

1545.32

0.0037

1525-1565

 

15216-DCU-750=

750

5.0

< 1 ps

< 0.1

> 45

7.14

1545.32

0.0037

1525-1565

 

15216-DCU-950=

950

5.5

< 1 ps

< 0.1

> 45

9.05

1545.32

0.0037

1525-1565

 

15216-DCU-1150=

1150

6.2

< 1 ps

< 0.1

> 45

10.95

1545.32

0.0037

1525-1565

 

15216-DCU-1350=

1350

6.4

< 1 ps

< 0.1

> 45

8.2

1545.32

0.0037

1525-1565

 

15216-DCU-1550=

1550

7.2

< 1 ps

< 0.1

> 45

9.4

1545.32

0.0037

1525-1565

 

15216-DCU-1950=

1950

8.8

< 1 ps

< 0.1

> 45

11.8

1545.32

0.0037

1525-1565

E-leaf

15216-DCU-E-200=

200

5.5

0.3

< 0.1

> 45

4.5

1545.32

0.0037

1525-1565

 

15216-DCU-E-350=

350

7.0

0.3

< 0.1

> 45

7.1

1545.32

0.0037

1525-1565

L-band

15216-DCU-L-300=

300

3.0

0.5

0.1

45

2.5

1590.41

0.0035-1

1576-1605

 

15216-DCU-L-600=

600

4.2

0.6

0.1

45

5.0

1590.41

0.0035

1576-1605

 

15216-DCU-L-700=

700

4.6

0.6

0.1

45

5.8

1590.41

0.0035

1576-1605

 

15216-DCU-L-800

800

5.0

0.6

0.1

45

6.7

1590.41

0.0035

1576-1605

 

15216-DCU-L-1000=

1000

5.8

0.8

0.1

45

8.2

1590.41

0.0035

1576-1605

 

15216-DCU-L-1100

1100

6.0

0.8

0.1

45

9.2

1590.41

0.0035

1576-1605

Table 2. Product Specifications

Environmental Specification

Description

Temperature range

-5 to +55°C

Relative humidity

95% maximum, noncondensing

Dispersion value over temperature

Dispersion value +/-3%

Insertion loss variance over temperature

< 0.6 dB

Table 3. Mechanical Specifications

Mechanical Specification

Description

Connector type

LC-UPC

Overall dimensions (H x W x D)

1.62 x 8.20 x 9.78 in. (41 x 208 x 248 mm)

Weight

Minimum 4.4 lb (2 kg); maximum 7.7 lb (3.5 kg)

Ordering Information

To place an order, visit the Cisco Ordering Home Page and refer to Table 4. To download software, visit the Cisco Software Center: http://www.cisco.com/en/US/ordering/index.shtml.

Table 4. Ordering Information

Band

Module

Product ID

Product Description

Compensation Level

C-Band

DCU-100

15216-DCU-100=

DCF of -100 ps/nm 

100 ps/nm

 

DCU-350

15216-DCU-350=

DCF of -350 ps/nm

350 ps/nm

 

DCU-450

15216-DCU-450=

DCF of - 450 ps/nm 

450 ps/nm

 

DCU-550

15216-DCU-550=

DCF of - 550 ps/nm 

550 ps/nm

 

DCU-750

15216-DCU-750=

DCF of -750 ps/nm

750 ps/nm

 

DCU-950

15216-DCU-950=

DCF of - 950 ps/nm

950 ps/nm

 

DCU-1150

15216-DCU-1150=

DCF of -1150 ps/nm

1150 ps/nm

 

DCU-1350

15216-DCU-1350=

DCF of -1350 ps/nm

1350 ps/nm

 

DCU-1550

15216-DCU-1550=

DCF of -1550 ps/nm

1550 ps/nm

 

DCU-1950

15216-DCU-1950=

DCF of -1950 ps/nm

1950 ps/nm

L-Band

DCU-L-300

15216-DCU-L-300=

SMF L-band Dispersion Compensation Unit 300ps/nm

300 ps/nm

 

DCU-L-600

15216-DCU-L-600=

SMF L-band Dispersion Compensation Unit 600ps/nm

600 ps/nm

 

DCU-L-700

15216-DCU-L-700=

SMF L-band Dispersion Compensation Unit 700ps/nm

700 ps/nm

 

DCU-L-800

15216-DCU-L-800=

SMF L-band Dispersion Compensation Unit 800ps/nm

800 ps/nm

 

DCU-L-1000

15216-DCU-L-1000=

SMF L-band Dispersion Compensation Unit 1000ps/nm

1000 ps/nm

 

DCU-L-1100

15216-DCU-L-1100=

SMF L-band Dispersion Compensation Unit 1100ps/nm

1100 ps/nm

E-LEAF

DCU-E-200

15216-DCU-E-200=

E-LEAF Dispersion Compensation Unit 200 ps/nm 

200 ps/nm

 

DCU-E-350

15216-DCU-E-350=

E-LEAF Dispersion Compensation Unit 350 ps/nm 

350 ps/nm

Shelf

Chassis

15216-DCU-SA=

Mechanical shelf (housing 2 DCM)

N/A

Service and Support

Using the Cisco Lifecycle Services approach, Cisco and its partners provide a broad portfolio of end-to-end services and support that can help increase the business value and return on investment for your network. This approach defines the minimum set of activities needed, by technology and by network complexity, to help you successfully deploy and operate Cisco technologies and optimize their performance throughout the lifecycle of your network.

For More Information

For more information visit URL below or contact your local Cisco account representative.