Cisco ASR 901 threshold logic
This router has inner optical transceiver threshold table. This means when transceiver is inserted in to this device, the device identifies module and chooses optical and electrical parameter alarm thresholds. Router checks optical transceiver vendor part number (40-55 bit) field. Basing on information in this field the appropriate threshold table is chosen. All threshold tables can be seen by issuing command on Cisco ASR:
show interfaces transceiver threshold table
If third party transceiver has wrong information in this data field, then there is a chance that Cisco ASR will chose wrong threshold table, and though SFP module will work, but alarms will be displayed.
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Cisco compatible transceivers
Cisco Compatible Transceivers - Matching our product portfolio with Cisco transceivers allows you to identify suitable alternatives. We are a supplier of compatible optical transceiver products, built to meet reliability and performance requirements. Cisco compatible transceivers are widely used as Cisco is one of the largest and best-known manufacturers of modern communication systems. Network engineers around the industry are often accustomed to the SKU logic of Cisco transceivers, which is different from the SKU logic of our products.