2. TABLE OF CONTENTS
1. Analysis of Current Network Requirements.............................................1
Table 1.1 Hardware configuration of iManager U2000.............................................13
Software configuration of iManager U2000..............................................................14
Table 1.2 Reliability of iManager U2000...................................................................14
1. Analysis of Current Network Requirements
Huawei realized that the “NTC Backbone” project is aimed to bring NTC a
leading government network, in which Telecom and IT infrastructure facilitate
the way, NTC works everywhere. Network is the underlying component of
Telecom and IT infrastructure, Huawei put reliability and future-proven as our
top prior consideration during the design.
A major characteristic of NTC is that the network should providing IT &
Telecom services to the Government of Pakistan up to tehsil level. Multi-
services such as NGN, IP core routers, Green Exchanges, GPON, data
networking are going to be widely deployed in the projected network
replacing the existing SDH network for better reliability and scalability.
Another outstanding characteristic of this network is unprecedented
performance required for future proven. Gigabit Ethernet, NG-SDH and
DWDM ring will free NTC from frequent upgrading.
Uncompromised performance and sophisticated features keep this
infrastructure as state-of-the-art even in Future.
2. Scope of work
HEC DWDM PROJECT Commercial in Confidence PAGE 1 OF 18
3. In order to meet the NTC’s requirement. Huawei Technologies Co., Ltd offers
OptiX OSN 6800 for Long Haul DWDM Solution, OSN 7500, OSN3500 and
OSN2500 for Remote Sites Connectivity through SDH solution and OptiX
iManager U2000 for NMS proposal.
The solution covers the supply, installation, testing, commissioning, services
and maintenance support including the required maintenance and spare parts.
The network consists of OptiX series equipment and Network Management
System including Terminal local management (LCT), ODF, Power Supply.
For detailed items of equipment and services offered, please refer to the Bill of
Quantities. A breakdown list of all related equipment materials is necessary for
proper establishment and operation of the whole project as long as the OptiX
equipment is detailed in the Bill of Quantity.
3 Network Element
Following equipments are offered for DWDM requirement as per Quantity:
OSN 6800(OTM) 2*10G system 56 Sets
OSN 6800 (OADM) 2*10G system 28 Sets
OSN 6800 (OLA) OLA 17 Sets
Following equipments are offered for NG-SDH requirement, as per Quantity:
OptiX OSN 3500 ADM-STM-64/16/4/1 30 Sets
OptiX OSN 2500 ADM- STM-16/4/1 18 Sets
OptiX OSN 7500 ADM-STM-64/16/ 13 sets
Network Management System (NMS)
OptiX iManager
U2000(Server)
Network Management System (Unix,
1+1 geographical real time backup)
2 Sets
OptiX iManager
U2000 (Client)
Network Management System (Windows
platform)
5 Sets
OptiX iManager
U2000LCT
Local Craft Terminal 16 LCTs
HEC DWDM PROJECT Commercial in Confidence PAGE 2 OF 18
4. UPS System UPS 10 Sets
DCN
Quid way AR2901 Router 3 Sets
Quid way AR2921 Router 2 Sets
4 Network Design Details
4.1 Long Haul DWDM Solution
4.1.1 Network Topology
The proposed network diagram is shown as below:
Network Topology
Legend: OTM FOADM OLA ROADM Junction Unknown
G652 Fiber G653 Fiber G655-LEAF G655-TWRS Single-fiber
bidirectional
larkanaK.N.ShahDadu
Kandhkot
Hyderabad Saeedabad Qazi Ahmed
Amirabad
Khairpur
Sukkur
Shikarpur
Pannu Aqil
Dherki R.Y.Khan InayatfurBahawalpur Lodhran
Multan
Central
New Multan
Muzzafargarh
Qureshi
Chowk
D.G.KhanFazilpurRojhan
kot Addu
Karor Lal
Eason
D.I. Khan
Bhakkar
Pizzu Bannu Daud Shah Kohat Peshawar
Nowshera
Kamra
Taxila
Islamabad
RAWALPIND
I
Mandra
JHELUM
KHARIN
Gujrat
Gujranwala
LahoreSheikhupuraOkara Faisalabad
Sahiwal
Mian Channu
Khanewal
Sardar Garh
81 km
31.85 dB
49 km
20.65 dB
101 km
38.5 dB
96km
33.5dB
96km
29.5dB
64km
28.9dB
46km
31.5dB
75km
32.7dB
88 km
33.5 dB
101km38.61dB
74 km
31.5 dB
47 km
27.5 dB
92km
27.5dB
94km
35dB
30km14dB38km
19.5dB77km
31.5dB
67km31.5dB
37km
16.45dB
68km
27.3dB
84 km
30 dB
46 km
18.63 dB
65 km
24.5 dB
23 km
14.5 dB
85km
29.74dB
8km
11.16dB
41km
17.85dB
24km
11.9dB
46km23.75dB
39
km
17.15dB
94 km
29 dB
90 km
25.5 dB
80km
24.5dB
49km
20.65dB
82 km
26.95 dB40km
17.5dB
102 km
26.7 dB
80 km
32.3 dB
52 km
24 dB
59 km
21.76 dB
42km
18.2dB
49km
20.65dB
45km
19.25dB
35km
15.75dB
14km
13.5dB
45km
26dB
72km
38.5dB
23km
13.5dB
35km15dB
74 km
29.4 dB
76 km
34 dB43 km
28 dB
103.66 km
38 dB
113.6 km
40.1 dB
46km
18.1dB
81km
32.8dB
47
km
19.95
dB
47.5km
16.5dB
91 km
39.5 dB
4.1.2 Fibre Attenuation
The fibre attenuation is according to Annex-B and the amendment as well as
3.5dB margin added. But for some section without indication, the attenuation
coefficient is supposed to be 0.35 dB/km and 3.5dB margin is considered in
this proposal. So the attenuation formula is 0.35*distance+3.5 (dB).
HEC DWDM PROJECT Commercial in Confidence PAGE 3 OF 18
5. 4.1.3 Power budget
There are seven kinds of EDFA amplifiers and one kind of Raman amplifiers
deployed in this solution, including OBU101, OBU103, OBU104, OBU205,
OAU101, OAU103, OAU105, RC01(Backward Raman). The optical amplifier
design is based on the following table:
4.1.4 OSNR
As per Huawei’s solution, the OSNR value for each Och section is designed
more than 16.4db. The OTU LSX for 10Gbits traffic is proposed and it’s OSNR
tolerance is 14.5dB.
4.1.5 wavelengths configuration
According to NTC’s requirements, the proposed DWDM system provides
2*10G links among 3 rings. And wavelengths configuration is as following:
HEC DWDM PROJECT Commercial in Confidence PAGE 4 OF 18
10. Network Configuration SUBNET_1
47.00 km
19.95 dB
G652
New Multan
M
40
D
40
B103
A101
C
OSNR =31.64 dB
47.50 km
16.50 dB
G652
Khanewal
M
40
M
40
D
40
D
40B103
A101
C
B104
A101
C
OSNR =22.658 dB
81.00 km
32.80 dB
G652
Mian Channu
B101B101
E
A101
B 46.00 km
18.10 dB
G652
Sahiwal
M
40
M
40
D
40
D
40B103
B103
E
B101 B104
A101
B
OSNR =32.006 dB
113.60 km
40.10 dB
G652
46.00 km
18.10 dB
G652
Okara
M
40
M
40
D
40
D
40B104
A101
C
B205
B103 F A B101 R01
OSNR =23.365 dBOSNR =32.006 dB
103.66 km
38.00 dB
G652
Faisalabad
M
40
M
40
D
40
D
40B205
B103FAB101R01 B205
A101
F
B101
OSNR =21.217 dB
43.00 km
28.00 dB
G652
103.66 km
38.00 dB
G652
Sheikhupura
M
40
M
40
D
40
D
40AB205
A101
F
B101 B103
A103
B
OSNR =27.067 dBOSNR =21.217 dB
76.00 km
34.00 dB
G652
Lahore
M
40
M
40
D
40
D
40B103
A103
C
B205
B103 E B101
OSNR =24.7 dB
74.00 km
29.40 dB
G652
Gujranwala
M
40
M
40
D
40
D
40B205
B103
D
B101 B103
B103
D
B101
OSNR =25.682 dB
35.00 km
15.00 dB
G652
74.00 km
29.40 dB
G652
Gujrat
M
40
M
40
D
40
D
40B103
B103
E
B101 B104
A101
B
OSNR =32.801 dBOSNR =25.682 dB
23.00 km
13.50 dB
G652
KHARIN
M
40
M
40
D
40
D
40B104
A101
B
B104
A101
B
OSNR =32.198 dB
72.00 km
38.50 dB
G652
JHELUM
M
40
M
40
D
40
D
40B104
B103
A
B205
A101
D
B101
OSNR =20.112 dB
45.00 km
26.00 dB
G652
Mandra
B101B205
C
B101 A103
E
14.00 km
13.50 dB
G652
45.00 km
26.00 dB
G652
RAWALPINDI
M
40
M
40
D
40
D
40B103
A103
B
B104
B103
OSNR =32.198 dBOSNR =20.112 dB
Islamabad
M
40
D
40
B104
B103
A
Network Configuration SUBNET_2
35.00 km
15.75 dB
G652
Islamabad
M
40
D
40
B104
A101
C
OSNR =32.887 dB
45.00 km
19.25 dB
G652
Taxila
M
40
M
40
D
40
D
40B104
A101
B
B104
A101
B
OSNR =31.229 dB
49.00 km
20.65 dB
G652
Kamra
M
40
M
40
D
40
D
40B104
A101
C
B103
A101
C
OSNR =31.55 dB
42.00 km
18.20 dB
G652
Nowshera
M
40
M
40
D
40
D
40B103
A101
C
B104
A101
C
OSNR =31.941 dB
59.00 km
21.76 dB
G652
42.00 km
18.20 dB
G652
Peshawar
M
40
M
40
D
40
D
40B104
A101
B
B103
A101
C
OSNR =31.211 dBOSNR =31.941 dB
52.00 km
24.00 dB
G652
Kohat
M
40
M
40
D
40
D
40B103
A101
D
B103
A101
C
OSNR =22.858 dB
80.00 km
32.30 dB
G652
Daud Shah
B101B103
E
A101
C 102.00 km
26.70 dB
G652
Bannu
M
40
M
40
D
40
D
40B103
B103
D
B101 B103
B103
F
B101
OSNR =24.83 dB
82.00 km
26.95 dB
G652
102.00 km
26.70 dB
G652
Pizzu
B101B103
E
B101 B103
F 40.00 km
17.50 dB
G652
D.I. Khan
M
40
M
40
D
40
D
40B103
B103
E
B101 B104
A101
B
OSNR =32.385 dBOSNR =24.83 dB
49.00 km
20.65 dB
G652
Bhakkar
M
40
M
40
D
40
D
40B104
A101
C
B104
A101
C
OSNR =26.463 dB
80.00 km
24.50 dB
G652
Karor Lal Eason
A103
E
A101
B 46.00 km
23.75 dB
G652
kot Addu
A101
B
A103
E
Qureshi Chowk
M
40
D
40
B103
A101
C
HEC DWDM PROJECT Commercial in Confidence PAGE 9 OF 18
11. Network Configuration SUBNET_3
24.00 km
11.90 dB
G652
Qureshi Chowk
M
40
D
40
B104
B103
B
OSNR =32.198 dB
41.00 km
17.85 dB
G652
Muzzafargarh
M
40
M
40
D
40
D
40B104
B103
A
B104
A101
B
OSNR =32.166 dB
New Multan
M
40
D
40
B104
A101
C
Network Configuration SUBNET_4
39.00 km
17.15 dB
G652
Qureshi Chowk
M
40
D
40
B104
A101
C
OSNR =32.354 dB
94.00 km
29.00 dB
G652
D.G.Khan
M
40
M
40
D
40
D
40B104
A101
B
B103
B103
E
B101
OSNR =24.407 dB
90.00 km
25.50 dB
G652
Fazilpur
A103
E
B101 B103
F 101.00 km
38.61 dB
G652
Rojhan
M
40
M
40
D
40
D
40B103
A101
E
B101 B205
A101
F
B101
OSNR =19.154 dB
67.00 km
31.50 dB
G652
101.00 km
38.61 dB
G652
Kandhkot
B101B205
D
B101 A101
F
Shikarpur
M
40
D
40
B103
B103
D
B101
OSNR =19.154 dB
Network Configuration SUBNET_5
38.00 km
19.50 dB
G652
Sukkur
M
40
D
40
B104
A101
B
OSNR =31.051 dB
Shikarpur
M
40
D
40
B104
A101
B
Network Configuration SUBNET_6
37.00 km
16.45 dB
G652
Sukkur
M
40
D
40
B104
A101
C
OSNR =32.476 dB
68.00 km
27.30 dB
G652
Pannu Aqil
M
40
M
40
D
40
D
40B104
A101
B
B103
B103
D
B101
OSNR =23.402 dB
84.00 km
30.00 dB
G652
Dherki
B101B103
E
B101 B103
D 46.00 km
18.63 dB
G652
R.Y.Khan
M
40
M
40
D
40
D
40B103
B103
E
B101 B103
A101
C
OSNR =18.75 dB
91.00 km
39.50 dB
G652
46.00 km
18.63 dB
G652
Sardar Garh
B103B103
E
A105
C 65.00 km
24.50 dB
G652
Inayatfur
A105
C
B103 B103
E 23.00 km
14.50 dB
G652
Bahawalpur
M
40
M
40
D
40
D
40B103
A101
D
B104
A101
B
OSNR =32.801 dBOSNR =18.75 dB
85.00 km
29.74 dB
G652
Lodhran
M
40
M
40
D
40
D
40B104
A101
A
B103
B103
E
B101
OSNR =25.434 dB
8.00 km
11.16 dB
G652
85.00 km
29.74 dB
G652
Multan Central
M
40
M
40
D
40
D
40B103
B103
E
B101 B104
B103
OSNR =32.198 dBOSNR =25.434 dB
New Multan
M
40
D
40
B104
B103
A
HEC DWDM PROJECT Commercial in Confidence PAGE 10 OF 18
12. Network Configuration SUBNET_7
30.00 km
14.00 dB
G652
Sukkur
M
40
D
40
B104
B103 A
OSNR =32.198 dB
94.00 km
35.00 dB
G652
Khairpur
M
40
M
40
D
40
D
40B104
A101
B
B205
B103
F
B101
OSNR =22.404 dB
92.00 km
27.50 dB
G652
Amirabad
B101B205
E
B101 B103
E 47.00 km
27.50 dB
G652
Qazi Ahmed
M
40
M
40
D
40
D
40B103
B103
F
B101 B103
A103
C
OSNR =22.738 dB
74.00 km
31.50 dB
G652
47.00 km
27.50 dB
G652
Saeedabad
B101B103
E
A103
B 88.00 km
33.50 dB
G652
Hyderabad
M
40
M
40
D
40
D
40B103
B103
E
B101 B103
A101
E
B101
OSNR =19.91 dBOSNR =22.738 dB
75.00 km
32.70 dB
G652
Nooriabad
B101B103
D
B101 A101
E
Karachi(pak/cap)
M
40
D
40
B103
B103
D
B101
Network Configuration SUBNET_8
46.00 km
31.50 dB
G652
Karachi(pak/cap)
M
40
D
40
B103
B103
C
B101
OSNR =22.202 dB
64.00 km
28.90 dB
G652
G.Hadeed
B101B103
D
B101 B103
C 96.00 km
29.50 dB
G652
Thatta
M
40
M
40
D
40
D
40B103
B103
D
B101 B103
B103
E
B101
OSNR =25.609 dB
96.00 km
33.50 dB
G652
Kotri
M
40
M
40
D
40
D
40B103
B103
F
B101 B103
A101
F
B101
OSNR =18.526 dB
101.00 km
38.50 dB
G652
96.00 km
33.50 dB
G652
Kalari
B101A103
F
B101 A105
E 49.00 km
20.65 dB
G652
Dadu
M
40
M
40
D
40
D
40B205
A101
F
B101 B103
A101
C
OSNR =23.473 dBOSNR =18.526 dB
81.00 km
31.85 dB
G652
K.N.Shah
B101B103
D
A101
C 77.00 km
31.50 dB
G652
larkana
M
40
M
40
D
40
D
40B103
B103
E
B101 B103
B103
E
B101
OSNR =24.077 dB
77.00 km
31.50 dB
G652
Shikarpur
M
40
D
40
B103
B103
D
B101
OSNR =24.077 dB
Equipment is detailed in the Bill of Quantity.
4.2 NG-SDH Solution
According to the bandwidth requirement and the existing SDH network
topology, Huawei provide OSN 7500 for the Junction sites, OSN 3500 for the
ring sites except junction sites and OSN 2500 for the spur sites. For each
rings, the total capacity is 2*STM-64, which can access E1,E3,FE and GE
services as Annex-E specified.
To deal with poor protection of existing SDH network, Huawei proposed NG-
WDM system can provide diversity protection schemes including network
protection and equipment protection. 1+1 hot backup function is provided for
power board, fan and XC, as well as TPS is available for E1 and E3 interfaces.
For the network protection, MSP ring, Optical-share-based MSP, SNCP and
Dual-node interconnection (DNI) protection can cooperate with each other to
maximize the network reliability. The DNI protection is one of unique features
HEC DWDM PROJECT Commercial in Confidence PAGE 11 OF 18
13. of Huawei’s solution, especialy suitable for the cross ring topology with
multiple junction node, which can anti failure of junction node. Optical-share-
based MSP is a evolution of traditional MSP, which can improve the efficiency
of bandwidth utilization significantly comparing with MSP.
5 Network Management Solution
5.1 General
OptiX iManager U2000 not only provides DWDM equipment management, but
also handles the entire OptiX family members including NG-SDH . In
compliance with ITU-T related recommendations, NMS offers rich network
maintenance functions. It can manage the fault, performance, configuration,
security, maintenance and test of the entire OptiX transmission network. It also
provides the end-to-end management function according to the requirements of
users. It improves the quality of network services, reduces the maintenance cost
and ensures rational use of network resources.
NMS with the features of user friendly Man-Machine interfaces, powerful and
state-of-the-art functionality, Its object oriented design approach allows the user
to enable or disable any service according to the physical network.
5.2 OptiX iManager U2000 Configuration
In this project, according to the RFP requirements we proposed remote 1+1
NMS backup solution(one for Karachi and one for Islamabad). Operator can do
network operation, administration, maintenance and provisioning (OAM&P) in
both main server and standby server.5*U2000 client and 16*U2000 LCT (Local
Craft Terminal) are proposed
For high reliability and efficiency, Huawei configure 2 Master GNE as well as 2
slave GNE for backup in this solution. The 2 Master GNE are located in
Islamabad and Karachi respectively, and the 2 slave GNE are located in Lahore
and Multan central respectively. The Master_1 GNE(Islamabad) convergent NE
information within Ring-1 through DCC, and report it to U2000 server(M) and
U2000 server(S) through DCN(E1/FE channel). The Master_2 GNE(Karachi)
convergent NE information within Ring-2 and Ring3 through DCC, and report it
to U2000 server(M) and U2000 server(S) through DCN(E1/FE channel). The
Slave_1 GNE is located in Lahore as Master_1 GNE backup, and The Slave_2
GNE is located in Multan Central as Master_2 GNE backup. So each GNE only
converge about 50 NEs(WDM +SDH) information, and has dual backup(GNE
backup and NMS server backup), so the response delay will be very small and
the reliability will be high.
The DCN planning is shown as below:
HEC DWDM PROJECT Commercial in Confidence PAGE 12 OF 18
14. So NTC should provide E1 channels for DCN connectivity as below:
E1 Channels Islamabad Karachi Lahore Multan Central Sukkur
Islamabad 5 2 2 1
Karachi 2 2 1
5.3 Management capability of U2000
The maximum management capability of U2000 depends on the different
hardware and software platform. Generally, the management system of client
based on windows platform has a better efficiency than the UNIX platform, so in
order to get the same management capability, based on windows platform can
reduce the hardware requirements, this results in the hardware cost reduced. So
in our offer, we provide the client system of U2000 based on the windows
platform.
Configured the hardware and software of U2000 as follows:
Table 1.1 Hardware configuration of iManager U2000
Item Specification
client Desktop,E5200 Or Above, 2G, 80G,
DVDRW, Integrated NIC, Integrated Audio
Card, Internal Speaker,19-Inch LCD,
English Windows XP Professional,
Internal V92 Modem
server Sun T5220 Single, 4C*1.2GHz, 8G(4*2G),
4*146GB,1*1000M NIC(4 Ports),1*Monitor
HEC DWDM PROJECT Commercial in Confidence PAGE 13 OF 18
15. Item Specification
Card
Software configuration of iManager U2000
Item Configuration
Operation system
of client
Windows XP professional
Operation system
of server
SUN Solaris 10(10/08)
Database Sybase Adaptive Server Enterprise
v15.0.2,English Version,20 Users,for Sun
Solaris SPARC 64-bit, Paper OEM
License, Media Kit,No Doc., With 1 Yr
Product Services
iManager
application
software
SDH Function(NMS Basic)-SDH NE
Manager, SDH E2E,MSTP Ethernet E2E
modules
NG-WDM Function(NMS Basic)- NG-
WDM NE Manager, WDM E2E modules
5.4 Reliability Design
The purpose of reliability design is to take some measures to reduce risk and
enhance the running ability of products.
The U2000 may encounter some risks when applied in the network. Although
the probability is very low, measures should still be taken for the sake of safe
running of the system.
Table 1.2 Reliability of iManager U2000
Risk Solution of the
U2000
Hardware
failure
Power failure of the U2000
computer
Use UPS power
supply
Communication failure with
gateway NE (fiber and cable
fault, and gateway NE network
interface fault)
Start DCN protection
first
Computer hard disk or CPU fault
at the server
Disk mirroring or HA
system
Software
failure
Database crash and network
data loss
Timely backup
database, dump
database, copy
HEC DWDM PROJECT Commercial in Confidence PAGE 14 OF 18
16. database (one type of
two-node cluster
backup), or export
configuration data to
script
The U2000 application software
failure
HA system
6 DC Power Supply
No-break DC power system is configured according to actual power
consumption of the equipments provided in the BOQ. The rectifier is modular
design, so it is easy for expansion in future. All the proposed rectifiers are
manufactured by Emerson, which can provide 1:N protection. Power system
configuration meet 10 hours 1+1 backup requirement. And the total power
consumption for each station as following: (unit: W)
7 Cutover Solution
Cutover is the biggest issue of this project, because there is no dark fibre
available for cutover. To deal with this problem, Huawei divide the cutover
progress into 2 phases :
1. Migrate the STM-4 service into Huawei NG-SDH equipment and then map
into DWDM system along the existing ring and the cutover will be
implemented based on ring topology section by section. During cutover, the
STM-4 traffic is transparently transmitted through SDH and WDM without
processing, so the existing protection scheme will still work. When the
cutover of section is finished, the new built network can provide SNCP
protection, which will inherit from existing SNCP and can be used to provide
protection for the intra-ring or inter-ring traffic. The cutover finished site can
HEC DWDM PROJECT Commercial in Confidence PAGE 15 OF 18
17. be used to provide additional protection resources to the traffic that is going
to be migrated. So the main route STM-4 service can be protected by the
alternate route as well as the new built network during cutover.
2. Migrate the tributary services into Huawei proposed NG-SDH equipment site
by site and swap the old SDH equipment, which means cutover the services
from DDF to DDF.
8 Protection scheme
Huawei proposed system can provides equipment level protection and
network level protection as per the requirements of NTC. To bring perfect
protection in network level, Huawei provides a combination solution with
Optical-path-shared MSP, SNCP and DNI(Dual-node interconnection).
Huawei provides Optical-path-shared MSP plus SNCP solution for ring1
protection, because the number of NE in ring1 exceeds 16, which means one
MSP ring can not passthrough all of NEs. So one SNCP ring passing all the NEs
is deployed and ather Optical-path-shared MSP ring is also deployed only for big
traffic NEs. According to the traffic matrix provided by NTC, the traffic between
big city is more than 60% of the total. For details, refer to the diagram below:
Ring-1
New MultanNew Multan
KHARINKHARIN
GujranwalaGujranwala
LahoreLahore
FaisalabadFaisalabad
PeshawarPeshawar
IslamabadIslamabad
Qureshi
Chowk
Qureshi
Chowk
MSP Ring-λ 2
SheikhupuraSheikhupura
SahiwalSahiwal
D.I. KhanD.I. Khan
KohatKohat
TaxilaTaxila
JHELUMJHELUM
NowsheraNowshera
New MultanNew Multan
RAWALPINDIRAWALPINDI
KHARINKHARIN
GujratGujrat
GujranwalaGujranwala
LahoreLahore
OkaraOkara
FaisalabadFaisalabad
KhanewalKhanewal
BannuBannu
PeshawarPeshawar
KamraKamra
IslamabadIslamabad
BhakkarBhakkar
SNCP Ring-λ 1
The protection scheme within ring2 and ring3 is similar with ring1, but because of
HEC DWDM PROJECT Commercial in Confidence PAGE 16 OF 18
18. NE number doesn’t exceed 16, so two MSP rings are provided in ring2 and
ring3. For details, refer to the diagram below:
Ring-2
New Multan
Qureshi
Chowk
Shikarpur
R.Y.Khan
Bahawalpur Lodhran
Multan
Central
D.G.Khan
Rojhan
Pannu Aqil
MuzzafargarhSukkur
New Multan
Qureshi
Chowk
Shikarpur
Multan
Central
Sukkur
MSP Ring-λ 1 MSP Ring-λ 2
Ring-3
Shikarpur
Sukkur
Shikarpur
Sukkur
MSP Ring-λ 1 MSP Ring-λ 2
larkana
Dadu
Kotri
Thatta
Karachi(pak/cap)
Hyderabad Qazi Ahmed
Khairpur
Hyderabad
Karachi(pak/cap)
Besides MSP and SNCP, Huawei also can provide Dual-node
HEC DWDM PROJECT Commercial in Confidence PAGE 17 OF 18
19. interconnection(DNI). The DNI network topology protection scheme
effectively enhances the reliability of inter-ring services. The DNI realizes the
protection of services between two rings, which are networked by the
equipment from different vendors and adopt different protection schemes.
HEC DWDM PROJECT Commercial in Confidence PAGE 18 OF 18
