
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.
shows the signal flow and timeslot allocation of the EPL services.
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 Boards
.
Figure 4-23
Signal flow and timeslot allocation (Ethernet transparent transmission board)
NOTE
The EGT1 board supports transparent transmission of Ethernet services, the link capacity adjustment
scheme (LCAS), test frames, and other functions.
VCTRUNK1
VC4-4:VC12:1-5
VCTRUNK1
VC4-4:VC12:1-10
SDH
NE1
VCTRUNK1
VC4-4:VC12:1-5
PORT1
NE3
User A2
VCTRUNK1
VC4-4:VC12:1-10
PORT1
User B2
VC4-1:VC12:6-15
VC4-1:VC12:1-5
3-EGT1
PORT1
PORT1
User A1
User B1
NE2
4-EGT1
3-EGT1
4-EGT1
l
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.
l
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.
Table 4-12
Parameters of external ports on the Ethernet boards
Parameter
NE1
NE3
Board
3-EGT1
4-EGT1
3-EGT1
4-EGT1
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
4 Configuring Ethernet Services
Issue 02 (2011-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4-35