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Cisco SFP-25G-ER-I Optical Module Sample Report

Time: 2023-12-05
        Cisco offers the SFP-25G-ER-I optical module, which supports 40 km 25G Ethernet transmission over single-mode fiber.
        The Moduletek Laboratory conducted performance tests on sampled units of this product, to further verify its specifications and actual on-site application performance.
1. Product Introduction
        The Cisco SFP-25G-ER-I optical module supports a link distance of up to 40 km over standard G.652 single-mode fiber (SMF) at 25G, and operates over the industrial temperature range (-40°C to 85°C).
                    Cisco SFP-25G-ER-I
                    The Cisco 25GBASE-ER Module supports a link length of 40 kilometers on standard Single-Mode Fiber (SMF)G.652 at 25G.
                    The module requires RS-FEC on the host ports for full reach operation at 25G.This module has an industrial temperature range.
        Key official parameters and physical appearance of the module are as follows:
Table 1 Key message parameters
Product
Max Power Consumption (W)
Transmit Power(dBm)*
Recelve Power(dBm)
Transmit and Receive Wavelength (nm)
Maximum
Minimum
Maximum
Minimum
SFP-25G-ER-I
1.5W
+6.0
-3.0
-4.0
-21.0
1295 to 1310

Physical appearance of the module
Figure 1 Physical Appearance of the Module
2. Module Identification Test
        The SFP-25G-ER-I module was installed into a Cisco N9K-C93180YC-EX switch with a 10 dB attenuator patch cord.
        The module established a normal LINK, and the port indicator lit up correctly.
        The switch successfully identified complete module information, including module type, vendor name, part number, serial number, transmission rate and link distance.
        Digital Optical Monitoring (DOM) data could be read normally, all values were within the specified threshold range, and no alarm or abnormal data loss occurred.
Table 2 Identification & Status Information
Item
Information Read by Switch
LINK
Identification
DOM Data
FEC Mode
3. Key Parameter Performance Test
        Performance tests of the SFP-25G-ER-I sample were performed in a test chamber at 45°C.
        The measured key parameters are shown below:
Table 3 Measured Performance Parameters
  Parameter
Test Data
Unit
Remarks
  Transmit Optical Power
1.21
dBm
 
  Receive Sensitivity (without fiber)
-23.80
dBm
5E-5 BER
  Receive Sensitivity (with 40km fiber)
-24-78
dBm
5E-5 BER
  Power Consumption
1.057
W
 
        Optical eye diagrams were also tested at 45°C on the sample module.
        The eye-diagram template and measured parameters are as follows:
Eye diagram template
Figure 2 Eye Diagram Template

Table 4 Eye Diagram Parameters (45°C)
Temperature (°C)
Extinction Ratio (dB)
P-P Jitter (ps)
Rise Time (ps)
Fall Time (ps)
Margin Value (%)
45
9.83
10.20
17.16
16.20
26.1
        Based on actual test results, the key performance parameters of the sampled module are consistent with Cisco’s official specifications.
        Moduletek Limited is at your service.
        For further inquiries about the above content, please contact us at: sales@moduletek.com
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