Archive

Some of our customers seem puzzled and are asking what’s the difference GLC-SX-MM vs GLC-SX-MMD? Witch one is right for my equipment!   Our short answer is – none! However, we will try to explain this in more detail. It’s related to changes in Cisco’s product nomenclature...

Time to time we hear our customers asking same & similar questions in different phrasing – Is GLC-SX-MM EOL? Is GLC-LH-SM EOL? But how it could be – we are still getting a lot of Cisco equipment with GE SFP interfaces and we need modules...

Short answer is - No!   Extended answer is – You could try and, in some occasions, it may even work in very short distances, but we definitely not recommend it. Thing is – 1000Base-SX multimode transceiver uses LED as a light source. It’s possible because Multi-mode...

QSFP Memory map Source: SFF-8636 Specification forManagement Interface for Cabled Environments When it comes to optical transceiver coding (EEPROM memory tables 00h, 01h etc) many equipment vendors follow optical transceiver industry specifications, however some vendors have chosen the path where if optical transceivers will not have specific...

      Enabling customers’ existing Nokia equipment to reach 100G connection over up to 80 km distance is a recent Proof of Concept for older equipment supporting new advancements in optical transceivers and maximizing already made investments.   Goal of Nokia 100G ZR4 compatibility test was...

There has been observation of SFP-T 10/100/1000BASE-T RJ45 copper transceivers in some equipment like for example - ZTE switches. In this switch SFP-T module sometimes produces a problem with physical and logical link state. After plugging SFP-T module in port the physical and administrative link...

There are two types of optical transceiver problems – software based and hardware based. This time definitely we talk about hardware based problem. SFP module is not locking in port. This means when engineer plugs it into switch port the SFP module is not producing...

If you never before used SFP-T modules on your device but now need start to use, then it is better to test SFP-T modules before purchase order because of different hardware used by different transceiver vendors. These are basic steps we suggest You to follow: ...

Many Internet Service Providers (ISP's) has need for using 100/1000 Mbps multi data rate on single fiber BiDi WDM modules because they are upgrading aggregation layer switches to Gigabit capability, but as customer CPE are used 100 Mbps Fast Ethernet devices - such as Media...