Call routing configurations in Huawei MSOFT

1. Description of different tables involved

2. Basic Concepts
 Call Source
 Call source refers to the subscriber or incoming trunk which initiate calls with the
same call process attributes
 The call source name is obtained by checking the subscriber data table or trunk
group table according to the calling subscriber or the incoming trunk group
number.
 Route Selection Source Name (RSSN)
 It defines the category number of the routing policy for outgoing
calls from the call source (local subscribers or incoming trunks).
 Same number prefix having different RSSN can be treated in
different way i.e. can be routed to different routes.
 Definition: ADD CALLSRC, Use: ADD RTANA

3. Basic Concepts
 Route Selection Name (RSN)
 It defines a route selection strategy that the MSOFTX3000 uses to handle an
outgoing call.
 Definition: ADD RTANA, Use: ADD CNACLD
 Combination of RSSN and RSN defines one RT
RSN + RSSN  RN

4. Relation of CALLSRC,
Basic ConceptRSSN, RSN
Incoming Call (BSC)
LAIGCI Table
LAIGCI Table
RSSN = 0
Call Source, RSSN
Call Prefix +
RSSN
CALLSRC
CALLSRC
(RSSN)
(RSSN)
(Call prefix-> RSN)
(Call prefix-> RSN)
Own / Other PLMN
RSSN = 0, 10
RN
Incoming Call
RSSN
+ RSN
Call Source, RSSN
Trunk Group
Trunk Group
Table
Table
Call to selected Route (RN)
CNACLD
CNACLD
RTANA
RTANA
(RSN)
(RSN)
Combination of (RSN, RSSN)
selects a particular Route (RN)
RSN + RSSN  RN

5. Basic Concepts
 Important Features related to RSN, RSSN
1.
2.
3.
Same prefix from different call source (with different RSSN) can be routed to different
route.
Call block from particular call source.
Blocking Transit calls through BL network.

6.  Same Call prefix to different Route
Basic Concepts
 Using different RSSN for different Call source, one particular call prefix
from different call source can be routed to different Routes.
 Use in BL network
Switch: MGKL01
Scenario: One BL subscriber under coverage of Khulna MSC calls a BL
subscriber at MGCT01. The call goes to TGDH01 and TGDH02 on 50-50
load share basis.
But if a GP subscriber of Khulna calls a BL subscriber at MGCT01, the call
is routed 50-50 load share to both Gateways.

7. Basic Concept
Incoming Call
Own PLMN
Trunk Group
Trunk Group
Table
Table
CALLSRN = BSC
TGDH01
TGDH01
TGDH02
TGDH02
RN=BL
RSSN = 0
SRT2
Call Prefix
CALLSRC
CALLSRC
Incoming Call
SRT1
GGDH01
GGDH01
SR
T2
CNACLD
CNACLD
GGDH02
GGDH02
RSSN
+ RSN
RN=PLMN
Trunk Group
Trunk Group
Table
Table
CALLSRN = GPKL01
RN
Other PLMN
SR
T1
 Same Call prefix to different Route
RTANA
RTANA
(RSN)
RSSN = 10
(RSN)
Combination of (RSN, RSSN)
selects a particular Route (RT)
RSN + RSSN  RT
Call Source
RSSN
Call Prefix
RSN
RN
BSC
0
019000207
BL_ROUTE
BL
GPKL01
10
019000207
BL_ROUTE
PLMN

8. Basic Call Block from Particular Call Source
 Concepts

Define the call source with a RSSN which is not used normally,
for example, RSSN=5.
 In Route Analysis table (RTANA), there is no entry for RSSN = 5. So, no Route (RT) is selected
and the call is dropped
As no RT is selected,
Incoming Call
Other PLMN
Trunk Group
Trunk Group
Table
Table
RSSN = 5
CALLSRC
CALLSRC
(RSSN)
(RSSN)
Call Prefix +
RSSN = 5
CNACLD
CNACLD
call is dropped
(Call prefix-> RSN)
(Call prefix-> RSN)
RSSN=5
+ RSN
GPDH01: IAM (Call Prefix)
RTANA
RTANA
(RSN)
(RSN)
No Match for RSSN = 5
So, No Route is selected

9. Transit call: Call from one PLMN is going to another PLMN using BL network
Blocking Transit call
CALLSRN:MGDH07
BL VMSC is
sending 018XX
Call Prefix
018xxxxx
CALLSRC
CALLSRC
CALLSRN:GPDH01
RSSN = 10
AKTEL Route
Route No = 201
CNACLD
CNACLD
AKTEL
RN
Trunk Group
Trunk Group
Table
Table
GP is sending 018XX
A party=017xxx
B party=018xxx
RSSN = 0
RSSN
+ RSN
Trunk Group
Trunk Group
Table
Table
• BL Calls can pass through the
RTANA table
• Call From GP fails to pass
RTANA due to different RSSN
which is not defined in RTANA
RTANA
RTANA
(RSN)
(RSN)
Call Source
RSSN
Call Prefix
RSN
Route
MGDH07
0
018
AKTEL_ROUTE
AKTEL
 If we define RSSN 10 for RSN AKTEL_ROUTE, transit call will pass
to AKTEL
Lesson: Outgoing Routes to other PLMN should only pass RSSN=0

10.  MSRN
MSRN Routes Routes are used to pass MSRN. own PLMN and other PLMN.
 MSRN Routes should be accessible for
 For own PLMN RSSN=0, for Other PLMN RSSN=10.
 Perform RTANA for both RSSN=0 & 10.
BL Subscriber
dials 019XX
I
SR
MGDH07
GP is sending 019XX
A party=017xxx
B party=019xxx
PR
N
HLR
IAM
Route: B
L
MGCT01
 Call from own PLMN and other PLMN
should pass MSRN Routes
 Two entries are required in RTANA
Call Source
RSSN
Call Prefix
RSN
Route
BSC
0
019000207
BL_ROUTE
BL
GPKL01
10
019000207
BL_ROUTE
BL
 If RTANA for RSSC 10 is not defined in MSRN Route, call from Other PLMN to that VMSC fails

11. One BL subscriber from Khulna
Same MSRN to Different MSC: goes directly viaVMSC calls a BL subscriber of
MGCT01. The call Example MGCT01

 But if a GP subscriber of Khulna calls a BL subscriber of
MGCT01, the call is routed 50-50 load share to both Tandem MSC
BL Subscriber
dials 019XX
RSN = BL_ROUTE
Route = MGCT01
SRT = MGCT01
MGKL01
MGCT01
RSN = BL_ROUTE
RSN = BL_ROUTE
Route = PLMN
Route = PLMN
HLR
interrogation
GP subscriber call BL
A party=017xxx
B party=019xxx
SRT=GGDH01
SRT=GGDH02
HLR
GGDH01
GGDH02
Analysis Table
Call Source
RSSN
(BSC)
0
(GP)
10
Call Prefix
RSN
8801900207
BL_ROUTE
Route
Subroute-1
Subroute-2
MGCT01
MGCT01
X
PLMN
TGDH01
TGDH01

12. Basic Concepts
Thanks