Administration: Diagnostics
Displaying Optical Module Status
Cisco Small Business 300 Series Managed Switch Administration Guide 86
7
If the po rt be ing tes ted is a Giga po rt, t he Advanced Information block contains the
following information, which is refreshed each time you enter the page:
•Cable Length: Provides an estimate for the length.
•Pair—Cable wire pair being tested.
•Status—Wire pair status. Red indicates fault and Green indicates status OK.
•Channel—Cable channel indicating whether the wires are straight or cross-
over.
•Polarity—Indicates if automatic polarity detection and correction has been
activated for the wire pair.
•Pair Skew—Difference in delay between wire pairs.
NOTE TDR tests cannot be performed when the port speed is 10Mbit/Sec.
Displaying Optical Module Status
The Optical Module Status page displays the operating conditions reported by
the SFP (Small Form-factor Pluggable) transceiver. Some information might not be
available for SFPs that do not support the digital diagnostic monitoring standard
SFF-8472.

MSA-compatible SFPs

The following FE SFP (100Mbps) transceivers are supported:
•MFEBX1: 100BASE-BX-20U SFP transceiver for single-mode fiber, 1310 nm
wavelength, supports up to 20 km.
•MFEFX1: 100BASE-FX SFP transceiver, for multimode fiber, 1310 nm
wavelength, supports up to 2 km.
•MFELX1: 100BASE-LX SFP transceiver, for single-mode fiber, 1310 nm
wavelength, supports up to 10 km.
The following GE SFP (1000Mbps) transceivers are supported:
•MGBBX1: 1000BASE-BX-20U SFP transceiver, for single-mode fiber, 1310
nm wavelength, supports up to 40 km.