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Introducing the CISCO SFP-10/25G-CSR-S Module
Time: 2023-04-20
The 10G network is based on the IEEE802.3 specification (10GBASE-SR), which states that the 10G-SR module can transmit up to 300m/400m over OM3/OM4 fiber. Network builders built the equipment at both ends of the fiber according to the maximum distance of 300m/400m, but the 25G-SR module only transmits up to 70m/100m on OM3/OM4 fibers, and some 10G networks can't be directly upgraded to 25G using the 25G-SR module.
CISCO has introduced an optical module model SFP-10/25G-CSR-S, which supports transmission of 300m/400m over OM3/OM4 fiber.
Figure 1 SFP-10/25G-CSR-S optical module transmission rate level transmission type
The module also has a dual-rate feature that allows it to interconnect with 25GBASE-SR and 10GBASE-SR optical modules.
Table 1 Optical Module Types for Interconnecting with SFP-10/25G-CSR-S Optical Modules
|
Type of local module
|
Type of opposite module
|
Link transmission rate
|
Link transmission rate
@OM3/OM4 |
|
CISCO 10/25G CSR
|
10G-SR
|
10G
|
300/400m
|
|
CISCO 10/25G CSR
|
25G-SR
|
25G
|
70/100m
|
|
CISCO 10/25G CSR
|
CISCO 10/25G CSR
|
10/25G
|
300/400m
|
For interconnection with 25G modules, RS-FEC (Forward Error Correction) is required to be enabled on the 25G ports, and the types of FEC supported by the SFP-10/25G-CSR-S are listed below:
Table 2 FEC types supported by the SFP-10/25G-CSR-S
|
Interface
|
Description
|
Bit Error Rate (BER) before FEC
|
FEC Requirement (host side)
|
Bit Error Rate (BER) after FEC
|
Maximum Transmission Distance(OM3/OM4)
|
|
IEEE 25GBASE-SR
CISCO SFP-25G-SR-S |
Multimode Short-Range Transmission
(OM3/OM4) |
5E-05
|
RS-FEC
|
1E-12
|
70/100m
|
|
CISCO SFP-10/25G-
CSR-S |
Multimode Short-Range Transmission
(OM3/OM4) |
5E-05
|
RS-FEC
|
1E-12
|
300/400m#
|
|
1E-08
|
FC-FEC*
|
1E-12
|
70/100m
|
||
|
1E-12
|
No-FEC*
|
1E-12
|
30/50m
|
# Transmission distance when interconnecting SFP-10/25G-CSR-S and IEEE 25GBASE-SR or SFP-25G-SR-S: 70/100m
* SFP-10/25G-CSR-S modules at both ends of the fiber
It is also known that host vendors such as HP-ARUBA (Model: JL485A), H3C (Model: SFP-25G-CSR-MM850), Extreme (Model: 10503) and other host vendors have already launched 25G-CSR/25G-eSR/25G-ESR optical module products with transmission distances of up to 300 meters @ OM3/400 meters @ OM4 。
Moduletek Limited can provide CISCO SFP-10/25G-CSR-S compatible optical module products and 25G-CSR/25G-eSR/25G-ESR optical module products compatible with host vendors such as HP-ARUBA, H3C and Extreme.
If you have any questions about the above content, you can contact us by Email : web@moduletek.com
