BHARAT SANCHAR NIGAM LIMITED

OFFICE OF THE CHIEF GENERAL MANAGER, T&D CIRCLE, SANCHAR VIKAS BHAVAN,

JABALPUR-482001 (MP)

 

A/T TEST SCHEDULE OF CorDECT WLL SYSTEM

(approved vide TD/SPC-6177/Vol.I  Dated 08.11.2001)

Part I    Pre-Switch On Tests

 

Sl.No.

TEST ITEM

REFERENCE/

REMARKS

1

Raised Floor & False Ceiling (where provided)

As per standard procedure

2

Layout & Floor Plan

As per approved document

3

Lighting & Power Outlets

As per T&D Circle Test Schedule

4

Check of Earthing System including CBS

Limit: DIU=0.5 & CBS=2.0 ohms

5

Automatic fire alarm

T&D Circle Test Schedule on Fire

6

Air-conditioning Plant

T&D Circle Test Schedule on A/C

7

Engine Alternator

T&D Circle Test Schedule on E/A

8

Power Plant & Batteries

T&D Circle Test Schedule on P/P

9

L.A.R.

As per approved layout

10

Cable Laying & Termination

As per  drawing

11

Power cable distribution

As per drawing

12

Check for DIU-CBS pairs:

a) Foreign potential, Loop Resistance &

    Insulation Resistance

b) Availability of protective devices

As per recommended value by Supplier

13

Hardware Conformity Check & LEQ

As per P.O. & Packing List

14

Check of Documentation

As per document List

15

Check of Spares

As per P.O.

 

The following documents are also to be submitted by Installation Authority:

 

1.           Q.A. test report

2.           SACFA clearance with tower height

3.           Approved Coverage plan  along-with CBS locations in map

4.           Approved junction/routing plan

 

Part II – Post Switch On Tests

 

Sl.No.

TEST ITEM

REFERENCE/REMARKS

1

Tertiary Power Supply Check

As per A/T Sheet

2

Software Confirmity

As per supplier document

3

Status of Power fail Alarm for CBS & check of alarms for the 3 pairs of the DIU-CBS

As per A/T sheet

4

Check of redundancy of units

As per A/T Sheet

5

Diagnostic check(status verification)

As per A/T Sheet

6

Back-up & Re-generation

As per A/T Sheet

7

Tones & announcements

As per A/T Sheet

8

Clock check

As per A/T Sheet

9

Functional Checks & Facilities (Subs+Switching):

-Malicious Call Observation

-Wake-up call

-Absent subs service(optional)

-Do not Disturb (optional)

-Call restriction:

      i/c only line

      o/g only line

      o/g call restriction – subs controlled

      o/g call restriction – Admn. Controlled

-3 party conference

-Third party enquiry (optional)

-Hot Line:

      immediate / delayed

-Call waiting

-Call forwarding:

      unconditional

      busy

      no reply

-Hunt group (optional)

-DTMF Tone (IN & IVRS access)

-CCB (optional)

-Priority Lines

-Closed User Group (optional)

-Changed Number, Non-payment(i/c    

 allowed), Non-payment  (i/c & o/g bar)

-Ring back service

-G-3 FAX working (9.6 Kbps)

-Data/Internet call through PC (9.6 Kbps)

-Home Meter

-Non-metered line(incoming calls)

NOTE: Some new facilities like ANALOG CLIP,HOWLERTONE,DISTINCTIVE RINGING, etc.,may be available in newer versions. Check for these new facilities,if available, at site. If 70 Kbps Data/Internet support is provided, these should be tested separately with NIB.                                   

As per document

 

Verify correct metering for Emergency, Local, STD, ISD, IN, INMARSAT, 000 calls. Also, check for proper tones/ announcements, as applicable including busy ,WLL power off & out of coverage conditions

 

 

10

Traffic Observation with:

       No dialing

       Partial dialing

       Incorrect dialing

       Busy subs

 

 

As per A/T Sheet

11

Charging management:

- Bulk billing & AMA

As per A/T sheet(confirm correct reading in Billing Centre)

12

Password management

As per A/T sheet

13

Calendar management

As per A/T sheet

14

CBS Tests:

-BER tests on 3 pairs(minimum 15 minutes)

-Creation/deletion

-Working of CBS even after failure of two 

  pairs

-Diversion of calls to another CBS on failing 

 of one CBS

-Proper alarm indication on trying of 13th

 call from a particular CBS

 

 

 

 

 

As per A/T sheet

15

Exchange data check:

-Subscriber data

-Charging data

-Routing data(verifying all working Levels against Class)

 

 

As per approved document

16

Inter-working Tests:

-Junction Testing

-Dialing of all levels

-Check of Emergency Services

-Check of special services

-Level Check for :

 WLL-WLL,

 WLL-PSTN /ISDN/GSM,

 PSTN/ISDN/GSM-WLL

 

 

 

As per approved routing plan

17

Transmission Tests:

    -Base Station check (on 2 Spare CBS)

(with one Antennae, with the 2nd Antennae

  and Diversity)

    -Subs Access Unit (on 5 Wall Set)

 

-As per Annexure I

-To be conducted on first two A/T

  sites for particular make.

 

18

Coverage Check

 

As per Annexure II

19

Service Quality

As per Annexure III

.

20

General Inspection

As per T&D Circle procedure

 

******   END  *******

 

ANNEXURE – I

TRANSMISSION TESTS

 

A.                     COMPACT BASE STATION (CBS)

1.          Measurement of Power at Antennae Port

Carrier Fqy.

With One Ant.

With 2nd Ant.

Diversity

Limits

Channels 0~9

Power at

odd

Power at even

Power at

odd

Power at even

Power at

odd

Power at even

+19

to

         +25 dbM

 

2.            Transmit Frequency Offset Measurement

Chl.no.& fqy.

With One Ant.

With 2nd Ant.

Diversity

Limits

Channels 0~9

Fqy. offset

at

odd

Fqy. offset

at

even

Fqy. offset

at

odd

Fqy. offset

at

even

 Fqy. offset

at

odd

Fqy. offset

at

even

+/-

         50 KHZ

 

 3.           Transmission Burst   

RF Carrier

With One Ant.

Power ramp matching

With 2nd Ant.

Power ramp matching
Diversity

Power ramp matching

Limits

Chls.

0~9

 

 

 

Yes/no

   4.             RF Carrier Modulation 

Channels

Data pattern

00001111/FIG 31 /01010101    With One Ant.

Data pattern 00001111/FIG 31 /01010101    

 With 2nd Ant.

Data pattern 00001111/FIG 31 /01010101   

with Diversity

Limits

0~9

+ve

-ve

+ve

-ve

+ve

-ve

+/- 259~ 403/

+/- 202~ 403/

+/- 202~ 403

    KHZ

 

 

B.   SUBSCRIBER ACCESS UNIT (SAU)

 

1.      Measurement of Power at Antennae Port

Carrier frequency

Power Measured

Limits

0~9

 

+ 19 ~ + 25 dBm

 

2.      Transmit Frequency Ofset Measurement

Chl. No./ Carrier fqy

frequency Measured

Limits

0~9

 

+/- 50 KHZ

 

3.      Transmission Burst

Carrier frequency

Power Ramp Matching

Limits

0~9

 

Yes/no

 

               4.   RF Carrier Modulation        

Channels

Data pattern

00001111

With One Ant.

Data pattern FIG.31

With 2nd Ant.

Data pattern 01010101

with Diversity

Limits

0~9

 

+ve

 

-ve

 

+ve

 

-ve

 

+ve

 

-ve

+/- 259~ 403/

+/- 202~ 403/

+/- 202~ 403

    KHZ

 

ANNEXURE - II

 

COVERAGE TESTS

 

Mark 0.5 Km,1.0 Km,1.5 Km, 2.0 Km, 3.0 Km, 4.0 Km and 5.0 Km circle in map from CBS Mast. Take four readings at periphery of each circle covering different directions. In case of multiple CBSs on the same Mast/Pole/Tower, pre-program one Wall Set with each CBS. A proper mix of different types of calls of  WLL-WLL, WLL-PSTN and PSTN-WLL calls should be made during the coverage and the readings should be recorded in the format given below:

 

Location of Mast/Pillar No.

CBS No.

Test location

Distance

(in Kms)

No. of Beeps

Wall Set Antennae Height

Type of   

   Call

 

Speech quality

Remarks

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                  Coverage during A/T should be at least for 90% of the Planned Coverage area WITH 99% call success rate(ie. Max 10% planned area is allowed for black spot + partial coverage). In case no Planned Coverage Document is available, the results should be intimated to User for decision.

 

Annexure III

 

ACCEPTANCE TESTING PROCEDURE FOR CONDUCTION OF SERVICE QUALITY OF corDECT WLL SYSTEM

 

a)                   Equipments Required

1.                   CBS 3 numbers

2.                   Wall Set 24 numbers

3.                   Splitter 3 numbers

4.                   Attenuator 40~60 dB, six numbers

5.                   RF cables for connection ,33 numbers

 

b)                   Physical Connectivity

 

-            connect the CBSs to the BUIC boards through three pair copper cables

-            connect a dummy load to one of the antennae ports of the CBS

-            From the second antennae port of the CBS, through RF cable, connect to the splitter.

-            The Splitter is then connected to two Attenuators, each capable of  connecting four Wall Sets.

-            The wall Set connectivity is again through RF cables.

-            Physically loop two PMIC boards.

 

( Please refer to the Physical Connectivity diagram )

 

c)                   Set-up procedure

 

-            Disable all other CBSs and PMIC boards which are not being utilized in

service Quality

 

-            The PSTN loop back call is simulated with looping two PIMC boards. Here, all the ports of one PIMC is configured as R2MF Outgoing and all the ports of the other PIMC board is configured as R2MF Incoming.

 

-            A fictitious Route Code is programmed with ROD=2 so that wall Sets can make loop back calls:

eg: XX-YYYY-ZZZ; where,

XX    =  Fictitious code

YYYY =  Exchange code

ZZZ  =  Subs number

 

-            In each CBS, four Wall Sets are programmed to make Outgoing calls while the other four Wall Sets are programmed to make Incoming calls

 

-            As the Wall Sets themselves generate traffic, they are programmed to traffic mode with the following settings:

 

Call Hold Time        = 5 seconds

Time between calls = 2 seconds

 

       -       Here the fixed mode calling pattern is only possible; i.e., one calling  

number will call the same called number. Hence after the first 25,000 calls, the traffic may be stopped and the calling/called numbers swapped for the subsequent 25,000 calls.

 

-                      During the second test cycle, all active/std-by copies may be interchanged.

-                       

 

d)                  Obsevations to be taken during Service Quality test

 

-                      Initial & Final meter reading by sys-print-bulk command

 

-                      Measurement of traffic observation for selected numbers  by command:

Sys-init-trafdata

Sys-measure-traffic

 

-                      Flush traffic data every half-hour to file by sys-flush-trafdata

 

-                      Diagnostic test by sys-test-card-status

 

-                      Tracing of call/path by :

Sys-config-tracer

Sys-sys-set-tracer

 

-                      put command in calendar by sys-add-in-job-cal

 

-                      Congestion report printout by sys-print-congrept

 

-                      Display commands by:

disdect-broadcast-attribute

disdect-freq-info

disdect-ipei-info

disdect-mm-info

dispstn-traffic

 

-                      Print flushed traffic log file by sys-print-file,log

 

-                      System card status by sys-print-cardstatus

 

-                      Route code verification by sys-print-routcode

 

e)                  Fault Limit

 

-                      A total of 50,000 calls are to be run with permitted failure max. 15 calls.

 

NOTE:

 

            The Service Quality Test may also be carried out without Splitter and Attenuator and with permissible failure  max. 200 out of 20,000 calls.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Copy Of  BSNL Letter No. 22-3/2001-RD/WLL/AT  Dated 12.10.2001

Endorsed  to all Vide No.TD/SPC-6177  Dated 22.10.2001

 

Bharat Sanchar Nigam Limited

(A Government of  India Enterprises)

Sanchar Bhavan,20,Ashoka Road

New Delhi -110001

 

No. 22-3/2001-RD/WLL/A/T                                          Oct. 12, 2001

 

To,

CGM ( T & D )

BSNL

Jabalpur

 

                            Sub:- A/T Schedule for  600 K   Rural WLL  Systems

               

 

                      Based on the detailed discussions held in the meeting by DDG(RN) with representatives of Vendors, TEC, QA and AT , the following decissions have been  taken .

 

1.              Receiver   Sensitivity , RF Frequency Accuracy, Spurious Emission Tests and  Full Band Operation in the field for A/T purposes may not be carried out  as these tests have  already been carried out  during QA Testing for all the systems and results are not likely to change.

 

2.              As part of RF Engineering and Network   Planning to be carried out by the vendor , A/T  will check the Digital map prepared by the vendor showing the predictable coverage with actual parameters using Reverse Link.

 

 

3.              In view of meeting commissioning schedule, A/T of  Rural  WLL systems may be  carried out in two phases, Equipment A/T  and Coverage A/T. The  system  may be deemed to be commissioned after completion of equipment A/T and loaded followed by coverage A/T. Coverage A/T for  I & II Phase systems should be completed by January 2002 and March 2002 respectively.

4.              Where ever physical coverage is less than 90% of predictable coverage area, approval of BSNL headquarter is required to be obtained.

 

5.              It is also requested that suitable arrangements may be made to complete Equipment A/T of the system within 15 days of its offer. All circles have been instructed to extend necessary help to A/T  team for completion of A/T.

              

Sd/-

(RAJIV GUPTA)

Jt.DDG(GP)

 

 

 

 

 

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