Datasheet

____________________________________________________ DS34S101, DS34S102, DS34S104, DS34S108
Rev: 032609 59 of 198
Figure 10-40. CESoPSN Structured-Without-CAS Mapping
4 25 254
254
Frame
1
Frame
2
Frame
N
Frame 1
4 25 4 25 4 25
Frame 2 Frame N
L2/L3
Header
Control
Word
CRC
Ethernet
packet
TDM payload
FRG bits = 00
(no fragmentation)
The packetization delay of a CESoPSN structured-without-CAS bundle is: T = N x 125 µs (i.e. N x the frame rate)
The minimum packetization time of an Ethernet packet for a structured (with or without CAS) bundle is 125 µs.
10.6.8.3 Structured with CAS (without Fragmentation)
In a structured-with-CAS bundle, the packet payload is comprised of the assigned timeslots from all the TDM
frames in a multiframe (e.g. 16 frames for E1) followed by the CAS signaling substructure, which contains the CAS
info for the assigned timeslots.
Figure 10-41. CESoPSN Structured-With-CAS Mapping (No Frag, E1 Example)
4 25 254 254
Frame
1
Frame
2
Frame
16
Frame 1
Frame 2
Frame 16
L2/L3
Header
Control
Word
CRC
Ethernet
packet
TDM payload
A
B
C
D
TS 2
A
B
C
D
TS 4
Multi-Frame boundary
4 252
4 252
4 252
A
B
C
D
TS 25
4 bit
pading
1 byte 1 byte
2 2 2
FRG bits = 00
(no fragmentation)
The minimum packetization time of an Ethernet packet for a structured (with or without CAS) bundle is 125 µs.
The minimum TDM payload of an Ethernet packet for a structured (with or without CAS) bundle is 8 bytes.