All channels on the CES MDA are supported as circuits to be emulated across the packet network. Structure-aware mode is supported for N*64 kb/s channel groups in DS1 and E1 carriers. Fragmentation is not supported for circuit emulation packets (structured or unstructured).
For DS1 and E1 unstructured circuits, the framing can be set to unframed. When channel group 1 is created on an unframed DS1 or E1, it is automatically configured to contain all 24 or 32 channels, respectively.
N*64 kb/s circuit emulation supports basic and Channel Associated Signaling (CAS) options for timeslots 1 to 31 (channels 2 to 32) on E1 carriers and channels 1 to 24 on DS1 carriers. CAS in-band is supported; therefore, no separate pseudowire support for CAS is provided. CAS option can be enabled or disabled for all channel groups on a specific DS1 or E1. If CAS operation is enabled, timeslot 16 (channel 17) cannot be included in the channel group on E1 carriers. Control channel signaling (CCS) operation is not supported.