FeaturesProvides 4-ports for Type 1 or Type 5 four-wire E&M lead signaling tie trunks that can be automatic, immediate-start, wink-start, and delay-dialEach port has T, R, T1, R1, E, and M signal leadsProvides release link trunks required for the CAS featureOption switches on each port can select connections to Type 1 E&M standard unprotected format, Type 1 E&M compatible unprotected format, Type 1 E&M compatible protected format and Type 5 simplex formatIncludes Refurbished
