Cisco ONS 15500 Series

Cisco ONS15540 ESPx 10 Gigabit Ethernet Transponder Module

Data Sheet

Cisco ONS 15540 ESPx
  10 Gigabit Ethernet Transponder Module

The Cisco® ONS 15540 ESPx is a highly modular, flexible, and scalable next-generation dense-wavelength-division-multiplexing (DWDM) platform that integrates data networking, storage networking, SONET, and SDH technologies over an ultrahigh-bandwidth, intelligent, optical infrastructure. The Cisco ONS 15540 ESPx 10 Gigabit Ethernet transponder modules further extend this scalability by increasing the carrying capacity per wavelength. The addition of the 10 Gigabit Ethernet transponders allows the Cisco ONS 15540 ESPx to scale from 2.5 Gbps to 10 Gbps, effectively and efficiently accommodating the growing demands in today's optical DWDM metropolitan-area (metro) networks.

Figure 1
Cisco ONS 15540 ESPx

Benefits of the Cisco ONS 15540 ESPx follow:

  • Scalable bandwidth—In addition to the support for the common storage, data, and legacy services from 16 Mbps to 2.5 Gbps on the Cisco ONS 15540 ESPx today, the 10 Gigabit Ethernet transponder module further increases the bandwidth per wavelength by a factor of 4.
  • Capacity—The 10 Gigabit Ethernet transponder modules allow customers to scale the network capacity from a 2.5-Gbps-based network to a 10-Gbps infrastructure. At 32 wavelengths over a single pair of fiber, customers can efficiently grow the network backbone up to 320 Gbps.
  • 10GBASE-LR standards based—The 10 Gigabit Ethernet transponder client interface is based on the IEEE 802.3ae 10GBASE-LR standards. The standards-based client interface ensures full interoperability with the 10 Gigabit Ethernet LAN physical layer (PHY) interfaces becoming common in next-generation enterprise switches and routers.
  • Cost-effectiveness—The 10 Gigabit Ethernet transponder module provides significant cost savings over the 2.5-Gbps solution for aggregated traffic.
  • Protection options—The Cisco ONS 15540 10 Gigabit Ethernet transponder module can be deployed with optical, splitter-based protection or 1 + 1 protection to provide enhanced service protection by sending the optical trunk signal simultaneously over both east and west fiber paths.
  • Data networking—The 10 Gigabit Ethernet transponder module enables the Cisco ONS 15540 to extend Gigabit Ethernet services over a 10-Gbps metro DWDM backbone for high-bandwidth, intercampus networking applications. By networking 10 Gigabit Ethernet IP traffic from end to end in its native Ethernet format at wire speed and with full operations, administration, and management (OAM) capabilities, enterprises can avoid the added complexity and cost of protocol conversion and rate adaptation into another metropolitan- or wide-area network (MAN or WAN) protocol.
  • Performance monitoring—The 10 Gigabit Ethernet transponder module offers both optical and digital performance monitoring, providing the customer added visibility into protocol and signal performance. Cisco patented technology will allow operations, administration, management, and provisioning (OAM&P) capabilities over these wavelengths to extend from a Cisco switch or router at the customer premises through the optical domain to the customer premises at the far end.

Optical Specifications

Table 1 gives specifications of the Cisco ONS 15540 ESPx, and Table 2 gives client specifications.

Table 1   Cisco ONS 15540 10-Gbps, 1550-nm, DWDM ITU Specification

Receiver Specifications Minimum Maximum
Receiver sensitivity

-22 dBm


Optical signal-to-noise ratio (OSNR) (0.1-nm bandwidth)

26 dB


Maximum overload


-8 dBm

Transmitter Specification Minimum Maximum
Output power

1 dBm

6 dBm

Dispersion tolerance1


±1000 ps/nm

Wavelength range

1529 nm

1562 nm

1. Add proper network level penalty to the OSNR or receive power sensitivity base on actual network topology characteristics such as dispersion.

Table 2   Cisco ONS 15540 10-Gbps, 1310-nm Client Specification2

Receiver Characteristics Minimum Maximum
Receiver sensitivity

-13.23 dBm


Maximum overload


0.5 dBm

Transmitter Characteristics Minimum Maximum
Average launch power

-5.2 dBm

0.5 dBm

Wavelength range

1260 nm

1355 nm

2. Supports IEEE 802.3ae 10GBASE-LR specification

Physical Specifications

  • Occupies _ slot in the Cisco ONS 15540 ESPx chassis
  • Two transponders per slot in a motherboard, for a total of 16 transponders per chassis
  • Dimensions (H x W x D):
    • 10 Gigabit Ethernet transponder: 6.4 x 1.3 x 7.6 in.
    • 10 Gigabit Ethernet motherboard: 18.1 x 1.3 x 9.1 in.
  • Bit rate: 10 Gigabit Ethernet DWDM LAN PHY
  • Standards protocol: IEEE 802.3ae 10 GBASE-LR
  • Digital monitoring: 64b/66b code errors

Ordering Information

Table 3 gives ordering information for the Cisco ONS 15540 ESPx 10 Gigabit Ethernet transponder.

Table 3   Ordering Information for Cisco ONS 15540 ESPx 10 Gigabit Ethernet Transponder

Product Part Number Description Minimum Cisco IOS® Software Release

10 Gigabit Ethernet 1310-nm SM transponder with SC channel = xy


Note:    Common Language Equipment Identifier (CLEI) codes are available upon request.