Circle
Andhra Pradesh
Karnataka
Kerala
Tamilnadu
Chennai
Total
No. of SSAs
migrated
14
17
1
17
0
49
No. of SSAs to be
migrated
8
2
10
0
1
21
Intec Mediation System
Validating the fields as per the CDR
structure
Identifying the call scenarios including
special numbers
Filter based on business requirements
Salient Features
Identifying difference services viz.
CENTREX, ISDN etc
Detecting error CDRs and reprocessing
after error rectification
Generating output as per the
downstream applications requirements
Administration
C
D
O
T
E
W
S
D
5
E
S
S
W
L
L
Configuration
Alarms & Logs
Reports
Monitoring
Mediation
E
1
0
B
O
C
B
A
X
E
C
O
L
L
E
C
T
I
O
N
Collection
Conversion
Config
Validate
Filter
Dup-check
Aggregate
Correct
Distribution
Scripts
D
i
s
t
r
i
b
u
t
i
o
n
Comverse Billing
Intec IOBAS
Neural
Fraud Management
Connectiva
Revenue Assurance System
G1 Enterprise Reporting
Online Collection of CDR files from Switches
Mediation System
FTP
FTP
FTP
Packetware
CES
MTE
FTP
FTAM /
X.25
CMISE
CDOT
E10B
OCB
EWSD
5ESS
AXE10
WLL
CES : Compact Embedded System (A intermediate device to connect to CDOT switch)
MTE : Magnetic Tape Emulator (A intermediate device to connect to E10B switch)
FTAM: File Transfer Access Management (A secured network protocol)
CMISE: Common Management Information Service Element (a secured protocol)
Collection of CDR Files from C-DOT Switch
 The main CDOT switch (MBM) which contains Central Module will
generate CDRs and dump into IOP within predefined intervals.
 CES (Compact Embedded System) device connects to the IOP and collects
the CDRS in to CES box buffer (256 MB storage capacity).
 Unlike MTE box which is directly connected to the E10 B switch, CES box
will be connected to the IOP only.
 CES box is nothing but a PC with Linux operating system having NIC card
assigned an IP address.
 For installing CES devices separate software to be installed in IOP and
CES attached PC.
Collection of CDR files from C-DOT Switch
Collection of CDR Files from E-10B Switch
• The control and Memory cards in E10B switch will generate CDRs and write
on to magnetic tape drive.
• At present these CDR files are collected off line into a exchange PC.
• A device called MTE box was installed by replacing the Magnetic Tape writer
for storing the CDR files.
• The data bus cable which is connected to Magnetic Tape Drive is bi-passed and
connected to MTE i.e. MTE is directly connected to E10B switch.
• File server (PC)
• IP for ftp
• MTE also requires an additional PC ( file server) with an application software
called “ADRS Charlie” loaded in it for collecting the CDR stream and making
the CDR files in regular intervals.
Collection of CDR files from E-10B Switch
Collection of CDR Files from OCB Switch
 The protocol implemented in OCB switches is CMISE which is
proprietary protocol of Alcatel.
 A third party application called Packetware is used as intermediate
application in a separate server, where in CDR data will be provided
(pushed) by the OCB switches.
 The CDR data will be written in the Packetware server in a regular
intervals (say 1 hour) and the CDR files will be collected from this
server to Mediation server using ftp protocol.
CMISE Common Management Information Service Element
CMIP common Management Information Protocol
(or)
Collection of CDR files from OCB Switch
Process Flow
N
E
CDR File
Transform
stage1
Duplicate
check
Aggregate
Transform
stage2
Billing
output
Filter
Step1 :- CDR file will be collected from the switch in a scheduled interval of time.
Step2 :- CDR file will be read as per encoding rules and CDR structure.
Step3 :- Filtration of CDRs will be done here as per business rules, such as
incoming calls, prepaid calls etc.
Step4 :- Duplicate CDR check follows.
Step5:- Aggregation of partial CDRs (if available) will be done.
Step6:- Apply the billing requirements and generate the CDRs in billing format.
CDR Processing
CDR Type
CDR Length in
Bytes
Block
Size
Bytes
Alcatel
Binary
42
2052
48
36
AXE-10
Ericsson
ASCII
190
2048
10
11
3
5ESS
AT&T
(USA)
ASCII
126/127
2000
15
110/95
4
E10B
Alcatel
Binary
26
2048
78
20
5
CDOT MAX-L,
CDOT MAXXL
CDOT
Binary
38bytes-2219,
36bytes-2216
No
No
No
6
OCB 283
Variable
Alcatel
Binary
Variable (~80bytes)
7
EWSD
Siemens
Binary
Variable (~80bytes)
8
WLL
ZTE
Binary
Variable ASN1
S.
No.
Name of the
Switch
Company
1
OCB 283
fixed
2
Records/ Dummy
Block
Bytes
CDR Processing
 Validating the CDR fields, error CDR detection & error CDR re-processing.
 Duplicate CDRs detection.
 Filtering the certain CDRs as per the business requirements.
 Incoming calls
 Transit calls (Calls transferred between two or more switches)
 FLPP outgoing calls
 ITC Outgoing calls
 Supplementary service CDRs (123,124,114,115,118,119)
 (Password registration, Local, STD, ISD barring provisioning by customer)
 Fillers (Some additional characters incorporated purposefully by Switch
in order to make the CDR structure / block to obey certain rules in size/
length)
 Other toll free CDRs are not filtered and providing to billing with free
CDR usage ID (1004).
CDR Processing
 Aggregation of long duration calls (Partial CDRs aggregation).
 Splitting of CDRs (in Broad Band IPDRs)
 Detection of all types of call scenarios.
 Local (PSTN, Centrex, ISDN.. etc)
 STD (PSTN, Centrex, ISDN.. etc)
 ISD (PSTN, Centrex, ISDN.. etc)
 Centrex
 CUG (by look up) etc.
CDR Processing
Special number calls:




Announcements
TOLL Free
Toll numbers (full charge to customers)
Toll numbers (partially charged to customers)
Special numbers like :
 Police
 Call centers
 Ambulance
 Hospital
 Help line (Crisis)
 Kisan Help line …. Etc
Coordination Mechanism
The Mediation Portal can be accessed on the
following link s for various zones
North:
http://10.202.215.24:8081/nmediation/
West:
http://10.193.212.253:8081/wmediation/
South:
http://10.196.215.41:8081/smediation/
East:
http://10.199.215.48:8081/emediation/
Recon Mechanism Between Switch & Mediation

Time Gap Analysis Reports

Indicating the Unacceptable Time gap between any two CDRs

Switches are categorized into 3 different categories

Acceptable Time gaps (busy Hour / Slack Hours) are defined for each
category.
Time Gap Analysis Configuration
CATEGORY
BUSY_HOURS
SLACK_HOURS
REMARKS
08:00 to 22:00 hrs
22:00 to 08:00 hrs
Category-1
2 Mins
15 Mins
High Traffic switch
Category-2
5 Mins
30 Mins
Medium Traffic Switch
Category-3
10 Mins
60 Mins
Low Traffic Switch
Recon Mechanism Between Switch & Mediation
Sequence Number Verification
• Either CDR sequence number or file sequence number / Time stamp continuity
CDR Sequence Number Verification
• Possible in EWSD, E10B, AXE & ZTE
• Even if time gap is present, if CDR sequence is continuous, there is no need to
alert the switch in-charges
File (BLOCK) Sequence Number Verification
• File sequence number is used in 5ESS & ZTE
• BLOCK sequence number is used in OCB
File Count Verification
• Used in CDOT Exchanges, where file transfer rate is one file per hour
Recon Mechanism Between Mediation & Billing
File Verification
• The number of files sent by mediation are verified with the number
of files received by the billing system & are reconciled
• Number of records in each file forwarded by Mediation are being
verified at billing end
Mediation Errors
Field Errors
Structural Errors
Non numeric calling
number (“A” number)
Errors in CDR format
Wrong dates / time
stamp in the CDR’s
Deviation from defined
format
Errors while writing
onto disk at the Switch
Mediation Reports
 Daily on-line CDR files status report for each SSA – switch wise
 Time – gap detection report for all switches
 CDR sequence check report for EWSD, E10B, WLL switches
 Block sequence check report for OCB
 File sequence check report for 5ESS and WLL switches
Problems in collection of CDR files
Escalation mechanism (SMS)
2 days SDE
1 dayJTO
Problem in CDR Collection
3 days DE
4 daysDGM
Problems in collection of CDR files
Escalation mechanism (SM docket)
CDR File collection problem
Ticket is raised by TCS on HCL
Action by TCS to
restore
Verification
by TCS w.r.t.
Mediaton
Status
Remedial
action by HCL
Closing the docket by
TCS after verification
CDR File collection OK
Thank You