CISCO SFP-25G-SR-S Optical Module sample report

      CISCO has model SFP-25G-SR-S optical module products, can support 25G Ethernet transmission 100M in multi-mode fiber, Moduletek Limited Laboratory has tested the product samples, to facilitate further understanding of the product's performance indicators and the effect of actual machine use.
1. Product Introduction
      CISCO SFP-25G-SR-S optical module supports 70M/100M link length on OM3/OM4; the module requires the FEC mode to be RS-FEC on the host port. the official key parameter information and the physical appearance of the module are as follows:
      Cisco SFP-25G-SR-S
      The Cisco 25GBASE-SR Module supports a link length of 70/100m on OM3/4 MMF.
      This module requires RS-FEC on the host ports.

Table 1 CISCO SFP-25G-SR-S Optical Module Key Parameters

Product	Type	Transmit Power (dBm）*		Receive Power (dBm)*		Transmit and Receive Wavelength ( nm )	Max Power Consumption ( W )
		Maximum	Minimum	Maximum	Minimum
SFP-25G-SR–S	25GBASE-SR 850nm MMF	2.4	-8.4	2.4	-10.3	840 to 860	1.2

Figure 1 CISCO SFP-25G-SR-S Optical Module Physical Appearance

2. Module on-board identification
      Connect the SFP-25G-SR-S module to CISCO N9K-C93180YC-EX switch, access the jumper, the module can be normal LINK, the port indicator light; module information can be recognized by the switch, such as the module type, vendor name, model number, serial number, rate, transmission distance, etc.; you can read the DOM data, and the DOM data are within the threshold range, no alarm phenomenon. No alarm phenomenon.

Table 2 CISCO SFP-25G-SR-S Optical Module Upload Recognition Results

3. Module Key Parameter Test
      The performance indexes of the SFP-25G-SR-S sample module on the test board are tested under 45°C in the laboratory module enclosure, and the test results are as follows;

Table 3 CISCO SFP-25G-SR-S optical module performance index test results  

      The sample module enclosure was tested at 45°C optical eye diagram with the following eye diagram template and parameters:

Figure 2 CISCO SFP-25G-SR-S Optical Module Eye Diagrams

Table 4 CISCO SFP-25G-SR-S Optical Module Eye Diagram Parameters

      From the actual test situation, the key parameters of the module are in line with CISCO's official claims.
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