ASCO Model 138 (Edco RJA-RJD Series) Surge Protective Device
Low Voltage DC | 0.200 kA
The ASCO Model 138 incorporates female jacks in and out. The ANALOGUE Model 138 voltage clamp is set for CO trunks and analogue telephone extensions (with ring in voltage), and the DIGITAL Model 138 voltage clamp is set for digital extensions (no ring in voltage).
