| Model | Part # | Description | Bulletin | Replacement Available | 
|---|---|---|---|---|
| RFL GARD 8000 Metering Module | RF-500520-3 | Metering Module - Front | Yes | No | 
| RFL GARD 8000 Distance Relay Module | RF-500520-5 | Distance Relay Module - Front (Download Manual) | Yes | No | 
| RF-500520-7 | Distance Relay Module - Rear (Download Manual) | Yes | No | |
| RFL IMUX 2000 CM-4 T1/E1 Module | RF-SP9547-15886-6 | CM-4 T1/E1 COMMON LOGIC MODULE w/Fiber (Download Manual) | Yes | Yes | 
| RF-SP9547-15886-6R Module | CM-4 T1/E1 COMMON LOGIC MODULE w/Fiber (Revertive Software) (Download Manual) | Yes | Yes | |
| RFL IMUX 2000 DACS-R Processor Module | RF-SP107405-6 | 8-PORT DACS T1/E1 MODULE w/Fiber (Download Manual) | Yes | Yes | 
| RFL IMUX 2000 DACS-R Redundant Module | RF-SP107415-6 | DACS REDUNDANCY T1/E1 MODULE w/Fiber (Download Manual) | Yes | Yes | 
| RFL IMUX 2000 CM-4 OIA-R Module | RF-SP107455-201, RF-SP107455-301, RF-SP107455-401, RF-SP107455-501, RF-SP107455-601 | Old T1/E1 Optical for CM-4 | Yes | Yes | 
| RFL IMUX 2000 DACS-R OIA Module | RF-SP107455-100, RF-SP107455-200, RF-SP107455-300, RF-SP107455-400, RF-SP107455-410, RF-SP107455-500, RF-SP107455-600 | Old T1/E1 Optical for DACS-R | Yes | Yes | 
| RFL IMUX 2000 Module | 9547-1304 | DS-562I, 56/64 Kbps Sync Data Module (Download Manual) | No | Yes | 
| 9547-15885, 9547-2001, 9547-2011, 9547-3001, 9547-3011, 9547-4001, 9547-4011, 9547-5001, 9547-5011 | CM3R Common Logic Module (Download Manual) | Yes | Yes | |
| 9547-1686 | DS-564NC, Wideband Sync Data Module (Download Manual) | No | Yes | |
| 9547-16551 | 5-Port RS-232 Sync Data Module (Download Manual) | No | No | |
| 106960-1, 106960-5 | OCUDP Module (Download Manual) | Yes | No | |
| 107455-100 | (DACS-R/MDACS) 850nm Multimode LED Fiber Optic Interface | No | No | 
 
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