SFP-OC3-MM and SFP-OC3-SR

[snarayanaraju]

Hello - What is the difference between SFP-OC3-MM and SFP-OC3-SR.

In my case, I have a Single Mode OFC patch cable. When I use SFP-OC3-SR on ASR 1K, the POS interface comes UP. If I replace that with SFP-OC3-MM, the Link will not come up.

Is the Fiber cable matters here?. We initially thought both SR and MM are same.

Cisco document says below

SFP-OC3-MM=	OC-3/STM-1 pluggable short-reach (2 km) transceiver module, 1310-nm wavelength, MMF, LC connector
SFP-OC3-SR=	OC-3/STM-1 pluggable short-reach (2 km) transceiver module, 1310-nm wavelength, LC connector

Please share your experience. Thanks in advance

SAI

[Richard Bradfield · Accepted solution]

SFP-OC3-MM= is for use on Multi mode fiber up to 2Kms

SFP-OC3-SR= is for use on Single mode fiber up to 2KMs ( Short reach)

so you must be patching into a single mode fiber.

HTH

Richard.