Signal Flow And Timeslot Allocation; Figure 4-23 Signal Flow And Timeslot Allocation (Ethernet Transparent Transmission Board); Table 4-12 Parameters Of External Ports On The Ethernet Boards - Huawei OptiX OSN 550 Configuration Manual

OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
Board Configuration Information
Ethernet transparent transmission boards or Ethernet switching boards can be used for
configuring EPL services. In this example, NE1 and NE3 are configured with two EGT1 boards
respectively, which occupy logical slots 3 and 4.

4.4.2 Signal Flow and Timeslot Allocation

Ethernet services are received from an external port, encapsulated through an internal port, and
mapped to the SDH network for transparent transmission. In this way, the node communicates
with a remote node.
Figure 4-23
For the method of calculating the bandwidth of the Ethernet services carried by a VCTRUNK,
see 6.3 Ethernet Service Bandwidths Carried by VCTRUNKs of Ethernet

Figure 4-23 Signal flow and timeslot allocation (Ethernet transparent transmission board)

NOTE
User A1
User B1
l
l

Table 4-12 Parameters of external ports on the Ethernet boards

Parameter
Board
Issue 02 (2011-06-30)
shows the signal flow and timeslot allocation of the EPL services.
The EGT1 board supports transparent transmission of Ethernet services, the link capacity adjustment
scheme (LCAS), test frames, and other functions.
NE1
3-EGT1
PORT1
VCTRUNK1
VC4-4:VC12:1-5
4-EGT1
PORT1
VCTRUNK1
VC4-4:VC12:1-10
The EPL services of user A:
– Occupy the first to fifth VC-12 timeslots of the first VC-4 (VC4-1:VC12:1-5) on the
SDH link between NE1 and NE3 and pass through NE2.
– Are added and dropped by using the first to fifth VC-12 timeslots of the fourth VC-4
(VC4-4:VC12:1-5) on the 3-EGT1 board of NE1 and the first to fifth VC-12 timeslots
of the fourth VC-4 (VC4-4:VC12:1-5) on the 3-EGT1 board of NE3.
The EPL services of user B:
– Occupy the sixth to fifteenth VC-12 timeslots of the first VC-4 (VC4-1:VC12:6-15) on
the SDH link between NE1 and NE3 and pass through NE2.
– Are added and dropped by using the first to tenth VC-12 timeslots of the fourth VC-4
(VC4-4:VC12:1-10) on the 4-EGT1 board of NE1 and the first to tenth VC-12 timeslots
of the fourth VC-4 (VC4-4:VC12:1-10) on the 4-EGT1 board of NE3.
NE1
3-EGT1
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NE2
VCTRUNK1
VC4-4:VC12:1-5
VC4-1:VC12:1-5
VCTRUNK1
VC4-4:VC12:1-10
VC4-1:VC12:6-15
SDH
NE3
4-EGT1 3-EGT1
4 Configuring Ethernet Services
Boards.
NE3
3-EGT1
PORT1
User A2
4-EGT1
PORT1
User B2
4-EGT1
4-35