| OPF500 | TT Electronics / Optek Technology | 7 | RECEIVER FIBER OPTIC 200KPBS | 
                                                                    
                                        | OPF505 | TT Electronics / Optek Technology | 5,000 | RECEIVER FIBER OPTIC 200KPBS | 
                                                                    
                                        | OPF507 | TT Electronics / Optek Technology | 5,000 | RECEIVER FIBER OPTIC 200KPBS | 
                                                                    
                                        | OPF510 | TT Electronics / Optek Technology | 5,000 | RECEIVR FIBR OPTIC 200KBPS TO-19 | 
                                                                    
                                        | OPF512 | TT Electronics / Optek Technology | 5,000 | RECEIVR FIBR OPTIC 200KBPS TO-18 | 
                                                                    
                                        | OPF520 | TT Electronics / Optek Technology | 2,234 | RECEIVER FIBER OPTIC 5 MB TO-18 | 
                                                                    
                                        | OPF522 | TT Electronics / Optek Technology | 614 | RECEIVER FIBER OPTIC 5 MB TO-18 | 
                                                                    
                                        | OPF562 | TT Electronics / Optek Technology | 5,000 | RECEIVER FIBER OPTIC 125MHZ |