Unchannelized T3 (DS3) and E3 interfaces are supported by the modules described in this chapter.
Throughout this chapter, interfaces on modules that provide ATM support are called T3/E3 ATM interfaces. Similarly, interfaces on modules that provide frame (HDLC) support are called T3/E3 frame interfaces.
This section describes the features of unchannelized T3/E3 interfaces. For information about configuring unchannelized T3 (DS3) interfaces over SONET/SDH, see Configuring Channelized OCx/STMx Interfaces.