31. The main optical filtering technology used in add-drop multiplexers is the Fabry P�rot etalon. 32. Although both have add / drop functionality, OADMs are distinct from add-drop multiplexers . 33. The 7330 ISAM is an internet protocol DSL access multiplexer that supports VDSL and ADSL protocols. 34. Inverse multiplexers are used, for example, to combine a number of ISDN connection is needed. 35. This signal is then shifted by another multiplexer , which is controlled by S [ 0 ]: 36. The SRB RGA rates passed through the orbiter flight aft multiplexers / demultiplexers to the orbiter GPCs. 37. Three of the multiplexers are regionally MFNs and one multiplexer is a nationwide SFN on channel 12B. 38. Three of the multiplexers are regionally MFNs and one multiplexer is a nationwide SFN on channel 12B. 39. Now with the multiplexers , we have control on a large scale for a huge number of valves. 40. The transmitting multiplexer combines the four data streams assuming that they are running at their maximum allowed rate.