In the last article we shared the main differences between Cisco S-Class Optics and Non-S-Class Optics, some cases related to the S-Class Optics from the users. But there is no more information telling the Cisco S-Class 10GBASE SFP+ Modules, such as the different Cisco 10GBASE SFP+ modules’ support, the SFP+ Port Cabling Specifications, Optical Transmit and Receive Specifications and ordering information.

So in this article we will share the main data sheet of Cisco S-Class 10GBASE SFP+ Modules, which can help you select the suitable Cisco Transceiver Modules for your Cisco switches and hardware.

The Cisco S-Class 10GBASE SFP+ modules offer customers a variety of 10 Gigabit Ethernet connectivity options optimized for Enterprise and data center applications. S-Class optics are available for the most common reaches needed for these applications.

1. Minimum cabling distance for -SR, -LRM, -LR, -ER modules is 2 meters, according to the IEEE 802.3ae standard.

2.Links longer than 30 kilometers are considered engineered links as per the IEEE 802.3ae standard.

3.Specified at transmission wavelength.

4.Requires 5 dB 1550 nm fixed loss attenuator for less than 20 kilometers. Attenuator is available as a spare. 

5.The part number is 15216 ATT LC 5=.

Optical Transmit and Receive Specifications

The following Table shows the main optical characteristics for the Cisco SFP+ modules.

 Ordering Information  (the ordering information for Cisco SFP+ modules and related cables)

Regulatory and Standards Compliance

Following is information about standards and safety 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
  
• IEEE 802.3: 10 Gigabit Ethernet
  
• SFP+ MSA SFF-8431 (optical modules, active optical cables, and passive twinax cables)
  

Safety

• Laser Class 1 21CFR-1040 LN#50 7/2001
  
• Laser Class 1 IEC60825-1
  

For other SFP+ 10 gigabit modules and cables, refer to the following link: http://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/data_sheet_c78-455693.html

Is S-Class SFP+ compatible with “normal” SFP+?

According to Cisco data sheet, S-class is only for Ethernet protocol, not for OTN (Optical Transport Network) or WAN-PHY (Wide Area Network Physics). In addition S-class optics have different temperature ranges with non-S-class optics. Therefore, if you don’t need any special long distance, temperature tolerances, or other special features, S-Class optics are cheaper and should be just fine for you. In fact, there may be more unknown differences. But the low price is still the main selling point, and we don’t need to worry about the compatibility problem.

Cisco S-Class 40GBASE QSFP Modules

The Cisco 40GBASE QSFP (Quad Small Form-Factor Pluggable) offers customers high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core, and distribution layers applications. There are two common types of Cisco S-Class QSFP40G—Cisco QSFP-40G-SR4-S and Cisco QSFP-40G-LR4-S.