On the 2-port OC3/STM1 Channelized Adapter card, channelization is supported down to the DS0 level. To change port types, all ports must first be shut down. The ports can be configured for DS1 (T1) or E1 channelization. All ports on the card must be either SONET or SDH; there cannot be a mix of the two types. When the first port is configured on a card, all other ports on the card must be set to the same type.
The 2-port OC3/STM1 Channelized Adapter card also supports DS3 channelization on access for TDM services as well as network mode with PPP.