Virtual Leased Line Services
7210 SAS M Services Guide Page 125
Figure 18: CESoPSN Packet Payload Format for Trunk-Specific n x 64 kb/s (with and without CAS
transport)
For CESoPSN without CAS, select the packet size so that an integer number of frames are
transported. That is, if n timeslots per frame are to be encapsulated in a TDM PW, then the packet
size must be a multiple of n (where n is not equal to 1). For example, if n = 4 timeslots, then the
packet size can be 8, 12, 16 and so on.
For CESoPSN with CAS, the packet size is an integer number of frames, where the number of
frames is 24 for T1 or 16 for E1, and is not user-configurable. The extra bytes for ABCD (CAS)
signaling bits are not included when setting the packet size.
Note: The extra bytes for CAS signaling bits must be included when setting the service-mtu size.
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