Also there are other Compatibale brands provides Cisco SFP 1.25G

The optical output can be disabled by a TTL logic high-level input of Tx Disable. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver.The standard serial ID information compatible with Cisco SFP 1.25G describes the transceiver’s capabilities, standard interfaces, manufacturer and other information. The host equipment can access this information via the 2-wire serial CMOS EEPROMprotocol. For further information, please refer to SFP Multi-Source Agreement (MSA).The SFP transceivers are compatible with RoHS.Within the development of telecommunication industry, the craze of fiber optic products is rising everyday. One, who wants to be a part of a competitive optical fiber industry, it ought to search the dependable source of supplying fibre optics products manually or via internet. Ingellen is a well-known center of optical fiber products for manufacturing and exporting the products, its good feedback from all over the world. Ingellen provides a fully line of fiber optic transceivers, and today I would like to introduce you something about the hot selling Cisco SFP 1.25G(small form-factor pluggable) transceiver in the following list.The transimpedance amplifier IC has internal AGC for wide dynamic range. The postamplifier is AC coupled to preamplifier through a capacitor and a low pass filter. It can be enough to pass the signal from 100Mb/s to Cisco SFP 1.25G without significant sensitivity. A Signal Detect status output flag is also provided.