Cisco 10 Gigabit Transceiver DWDM-X2-31.12
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As modern enterprise data demands continue to escalate, optical networking solutions have become foundational for scalable IT infrastructure. Dense Wavelength-Division Multiplexing (DWDM) technology allows organizations and service providers to expand network capacity significantly without deploying additional optical fiber cables. By multiplexing multiple optical signals onto a single fiber using distinct wavelengths, DWDM offers a highly efficient path toward bandwidth expansion.
Cisco offers enterprise-grade DWDM Small Form-Factor Pluggable (SFP) modules designed for high-speed, reliable data transmission. These modules allow enterprises to maximize existing fiber assets while maintaining interoperability across Cisco routing and switching platforms. Integrating advanced optics directly into network devices lowers capital expenditure, reduces operational complexity, and ensures long-term infrastructure agility.
Product overview
The Cisco DWDM SFP module portfolio represents a versatile line of hot-swappable transceivers engineered for Gigabit Ethernet, Fibre Channel, and SONET/SDH applications. Operating across 32 distinct wavelengths on the ITU 100-GHz grid (ranging from 1530.33 nm to 1560.61 nm), these optics utilize cooled electro-absorption modulated lasers and sensitive receivers to support extended transmission distances up to 80 kilometers over single-mode fiber without intermediate optical amplification.
This hardware portfolio includes multirate Cisco DWDM SFPs supporting 1000BASE-ZX Gigabit Ethernet, 1G and 2G Fibre Channel, and SONET OC-48/SDH STM-16 protocols. The modules work seamlessly alongside Cisco passive DWDM multiplexers and demultiplexers, enabling efficient optical channel management over shared fiber routes.
Supported platforms span key Cisco enterprise and service provider systems, including Cisco Catalyst 6500, 4500, and 3750 switches, alongside Cisco ASR 9000, ASR 1000, Cisco 7600, and ONS optical platforms. This broad compatibility streamlines optical deployment across diverse enterprise network architectures.
Features and benefits
- High-Density Capacity: Supports 32 ITU 100-GHz grid wavelengths, enabling massive optical capacity expansion over existing single-mode fiber assets.
- Multi-Protocol Flexibility: Offers comprehensive compatibility with Gigabit Ethernet (1000BASE-ZX), 1G/2G Fibre Channel, and SONET OC-48/SDH STM-16 networks.
- Extended Transmission Range: Achieves optical link budgets capable of spanning up to 80 kilometers without requiring costly external optical amplification.
- Hot-Swappable SFP Design: Enables frictionless installation, upgrades, and maintenance without disrupting active system operation or requiring downtime.
- Real-Time Diagnostics: Features integrated Digital Optical Monitoring (DOM) to monitor optical power, temperature, laser bias, and supply voltage.
- Integrated Ecosystem: Works seamlessly with Cisco passive optical multiplexers, minimizing space, power, and active hardware overhead across data centers.
Product overview
The Cisco® Dense Wavelength-Division Multiplexing (DWDM) X2 pluggable module (Figure 1) allows enterprise companies and service providers to offer scalable and easy-to-deploy 10 Gigabit Ethernet services in their networks.
Cisco DWDM X2 Module
Main features of the Cisco DWDM X2 include:
● The Cisco DWDM X2 supports 10GBASE Ethernet.
● The hot-swappable input/output device plugs into an Ethernet X2 port of a Cisco switch or router to link the port with the network.
● The Cisco DWDM X2 supports the Cisco Quality Identification (ID) feature, which enables a Cisco switch or router to identify whether or not the module is an X2 module certified and tested by Cisco.
The module supports 32 nontunable ITU 100-GHz wavelengths compatible with the Cisco ONS DWDM channel plan.
● The Cisco DWDM X2 supports digital optical monitoring capability.
Platform Support
The Cisco DWDM X2 is supported across a variety of Cisco switches, routers, and optical transport devices.
Connectors and Cabling
● Equipment: Standard X2 interface
● Network: Dual SC/PC connector
Note: Only connections with patch cords with PC or UPC connectors are supported; patch cords with APC connectors are not supported. All cables and cable assemblies used must be compliant with the standards specified in the “Standards” section.
Dimensions
Dimensions (D x W x H) are 91 x 36 x 13.46 mm. Cisco X2s typically weigh less than 300 grams.
Environmental conditions and power requirements
● Operating temperature range: 32 to 158°F (0 to 70°C)
● Storage temperature range: -40 to 185°F (-40 to 85°C)
The maximum power consumption per Cisco X2 module is 4W.
Optical parameters
Table 1 shows the main optical characteristics for the Cisco DWDM X2 Modules.
Table 1. Optical parameters
| Parameter |
Symbol |
Minimum |
Typical |
Maximum |
Units |
Notes and Conditions |
| Transmitter |
||||||
| Spectral width |
0.2 |
nm |
Full width,-20 dB from maximum, with resolution bandwidth (RBW) = 0.01 nm |
|||
| Transmitter center wavelength |
x – 100 |
x |
x + 100 |
pm |
Refer to Table 2 for center wavelengths |
|
| Side-mode suppression ratio |
SMSR |
30 |
dB |
|||
| Transmitter extinction ratio |
OMI |
9 |
dB |
|||
| Transmitter optical output power |
Pout |
-1.0 |
3.0 |
dBm |
Average power coupled into single-mode fiber |
|
| Receiver |
||||||
| Receiver optical input wavelength |
1530 |
1565 |
nm |
|||
| Receiver damage threshold |
-1.0 |
dBm |
||||
| Dispersion tolerance |
-500 |
1600 |
ps/nm |
|||
| Power-Limited Performance (measured at optical signal-to-noise ratio [OSNR] of 30 dB at 0.1-nm RBW) |
||||||
| Optical input power |
Pin |
-23.0 |
-7.0 |
dBm |
* |
|
| Dispersion power penalty |
3 |
dB |
* |
|||
| Noise-Limited Performance (Measured at OSNR of 24 dB at 0.1-nm RBW) |
||||||
| Optical input power |
Pin |
-17.0 |
-7.0 |
dB |
* |
|
| Dispersion OSNR penalty |
3 |
dB |
* |
|||
Note:
1. Parameters are specified over temperature and at end of life unless otherwise noted.
2. When shorter distances of single-mode fiber are used, an inline optical attenuator (10-dB) must be used to avoid overloading and damaging the receiver.
3. To prevent burst errors, Cisco suggests the use of appropriate optical attenuation in front of the receiver when interoperating X2 DWDM and XENPAK DWDM specifically under the following conditions:
● When the input power on the receiver exceeds -14dBm
● When the optical signal to noise ratio is less than 30dB @ 0.1nm RBW
● When total chromatic dispersion is greater than 1500ps/nm
The attenuation should be chosen to limit the input power into the receiver to be less than - 14dBm
Ordering information
Table 2 gives details about ordering Cisco DWDM X2s.
Table 2. Cisco DWDM X2 ordering information
| Product Number |
Description |
ITU Channel |
| DWDM-X2-60.61= |
10GBASE-DWDM 1560.61 nm X2 (100-GHz ITU grid) |
21 |
| DWDM-X2-59.79= |
10GBASE-DWDM 1559.79 nm X2 (100-GHz ITU grid) |
22 |
| DWDM-X2-58.98= |
10GBASE-DWDM 1558.98 nm X2 (100-GHz ITU grid) |
23 |
| DWDM-X2-58.17= |
10GBASE-DWDM 1558.17 nm X2 (100-GHz ITU grid) |
24 |
| DWDM-X2-56.55= |
10GBASE-DWDM 1556.55 nm X2 (100-GHz ITU grid) |
26 |
| DWDM-X2-55.75= |
10GBASE-DWDM 1555.75 nm X2 (100-GHz ITU grid) |
27 |
| DWDM-X2-54.94= |
10GBASE-DWDM 1554.94 nm X2 (100-GHz ITU grid) |
28 |
| DWDM-X2-54.13= |
10GBASE-DWDM 1554.13 nm X2 (100-GHz ITU grid) |
29 |
| DWDM-X2-52.52= |
10GBASE-DWDM 1552.52 nm X2 (100-GHz ITU grid) |
31 |
| DWDM-X2-51.72= |
10GBASE-DWDM 1551.72 nm X2 (100-GHz ITU grid) |
32 |
| DWDM-X2-50.92= |
10GBASE-DWDM 1550.92 nm X2 (100-GHz ITU grid) |
33 |
| DWDM-X2-50.12= |
10GBASE-DWDM 1550.12 nm X2 (100-GHz ITU grid) |
34 |
| DWDM-X2-48.51= |
10GBASE-DWDM 1548.51 nm X2 (100-GHz ITU grid) |
36 |
| DWDM-X2-47.72= |
10GBASE-DWDM 1547.72 nm X2 (100-GHz ITU grid) |
37 |
| DWDM-X2-46.92= |
10GBASE-DWDM 1546.92 nm X2 (100-GHz ITU grid) |
38 |
| DWDM-X2-46.12= |
10GBASE-DWDM 1546.12 nm X2 (100-GHz ITU grid) |
39 |
| DWDM-X2-44.53= |
10GBASE-DWDM 1544.53 nm X2 (100-GHz ITU grid) |
41 |
| DWDM-X2-43.73= |
10GBASE-DWDM 1543.73 nm X2 (100-GHz ITU grid) |
42 |
| DWDM-X2-42.94= |
10GBASE-DWDM 1542.94 nm X2 (100-GHz ITU grid) |
43 |
| DWDM-X2-42.14= |
10GBASE-DWDM 1542.14 nm X2 (100-GHz ITU grid) |
44 |
| DWDM-X2-40.56= |
10GBASE-DWDM 1540.56 nm X2 (100-GHz ITU grid) |
46 |
| DWDM-X2-39.77= |
10GBASE-DWDM 1539.77 nm X2 (100-GHz ITU grid) |
47 |
| DWDM-X2-38.98= |
10GBASE-DWDM 1538.98 nm X2 (100-GHz ITU grid) |
48 |
| DWDM-X2-38.19= |
10GBASE-DWDM 1538.19 nm X2 (100-GHz ITU grid) |
49 |
| DWDM-X2-36.61= |
10GBASE-DWDM 1536.61 nm X2 (100-GHz ITU grid) |
51 |
| DWDM-X2-35.82= |
10GBASE-DWDM 1535.82 nm X2 (100-GHz ITU grid) |
52 |
| DWDM-X2-35.04= |
10GBASE-DWDM 1535.04 nm X2 (100-GHz ITU grid) |
53 |
| DWDM-X2-34.25= |
10GBASE-DWDM 1534.25 nm X2 (100-GHz ITU grid) |
54 |
| DWDM-X2-32.68= |
10GBASE-DWDM 1532.68 nm X2 (100-GHz ITU grid) |
56 |
| DWDM-X2-31.90= |
10GBASE-DWDM 1531.90 nm X2 (100-GHz ITU grid) |
57 |
| DWDM-X2-31.12= |
10GBASE-DWDM 1531.12 nm X2 (100-GHz ITU grid) |
58 |
| DWDM-X2-30.33= |
10GBASE-DWDM 1530.33 nm X2 (100-GHz ITU grid) |
59 |
Regulatory and standards compliance
Standards
● GR-20-CORE: Generic Requirements for Optical Fiber and Optical Fiber Cable
● GR-326-CORE: Generic Requirements for Single-Mode Optical Connectors and Jumper Assemblies
● GR-1435-CORE: Generic Requirements for Multifiber Optical Connectors
Safety
● Laser Class I 21CFR1040
● Network Equipment Building Standards (NEBS) Level 3