C-DOT DSS MAX Bedienungsanleitung
C-DOT NSE
INSTALLATION
AND
USER MANUAL
System
Practices
Section No. 403-305-0717
Draft 03, August 2000
C-DOT DSS MAX
INSTALLATION
AND
USER MANUAL
© 2000, C-DOT
Printed in India
C-DOT DSS MAX
MAINTENANCE ALARMS AND REPORTS
DRAFT 03
AUGUST 2000
BHADRA 2057
SERIES 300 : INSTALLATION
CSP SECTIONNO.403-305-0717
THIS C–DOT SYSTEM PRACTICE REFERS TO THE C–DOT NETWORK SYNCHRONISATION
EQUIPMENT (ABBREVIATED AS C–DOT NSE IN THE REST OF THIS PUBLICATION).
THE INFORMATION IN THIS SYSTEM PRACTICE IS FOR INFORMATION PURPOSES AND IS
SUBJECT TO CHANGE WITHOUT NOTICE.
A COMMENT FORM HAS BEEN INCLUDED AT THE END OF THIS PUBLICATION FOR
READER'S COMMENTS. IF THE FORM HAS BEEN USED, COMMENTS MAY BE ADDRESSED
TO THE DIRECTOR (SYSTEMS ), CENTRE FOR DEVELOPMENT OF TELEMATICS, 39, MAIN
PUSA ROAD, NEW DELHI - 110 005
©2000 BY C–DOT, NEW DELHI.
Table of Contents
Chapter 1. Introduction.....................................................................................................................................5
Chapter 2. Product Description........................................................................................................................6
2.1. System Architecture................................................................................................................6
2.2. Input Clock Selection...............................................................................................................6
2.3. Synchronised Clock Outputs.................................................................................................11
2.4. Check Inputs.........................................................................................................................11
2.5. User Interface Panel..............................................................................................................11
2.6. NSE Terminal Interface........................................................................................................11
Chapter 3. NSE Packaging Details ................................................................................................................12
3.1. General...................................................................................................................................12
3.2. Firmware Details...................................................................................................................12
3.3. Jumper Details for NCP Card...............................................................................................13
3.4. Jumper Details for NIO Card ...............................................................................................14
Chapter 4. NSE Integration with Exchange..................................................................................................15
4.1. Introduction............................................................................................................................15
4.2. NSE Integration with E-10B Exchanges .............................................................................15
4.3. NSE Integration with C-DOT SBMs....................................................................................18
Chapter 5. Slip Monitoring .............................................................................................................................29
5.1. Slip Monitoring in C-DOT DSS.............................................................................................29
Chapter 6. Debugging Aids for NSE ..............................................................................................................34
\\LOTUS\HOME\NSE\WORD\NSEINUSR.DOC July 28, 2000
INSTALLATION AND USER MANUAL 5
Chapter 1.
Introduction
Network Synchronisation Equipment (NSE) has been developed by C-DOT to fulfill
the requirements of synchronising all the level 2 exchanges in the Indian network.
This equipment can be interfaced with E-10B, C-DOT SBM and C-DOT MAX-L
exchanges. The input and output interface of NSE are developed as specified by
ITU-T Rec G.703. Both E-10B and C-DOT MAX-L exchanges accept 2.048 MHz
clocks as specified by G.703/6 Rec. However C-DOT SBMs accept 8.192 MHz clock
which is also supplied by NSE.
This equipment has two modes of operation. Selection of a particular mode of
operation of NSE is jumper selectable and is explained in Chapter 3 of this
document.
a) Level 2 Mode : This mode of NSE is suggested for supplying synchronised
output clock of stability 1E-10/day to exchanges (E-10B and C-DOT MAX-L).
The equipment is named NSE2 in this mode of operation.
b) Level 4 Mode : This mode of NSE is suggested for supplying synchronised
output clock of stability 1E-8/day to exchanges (C-DOT SBMs). The
equipment is named NSE4 in this mode of operation).
It may be noted that the NSE2 and NSE4 are the same equipment except that
NSE2 has two additional level 2 crystal oscillators mounted for level 2 operation.
6 C-DOT NSE
Chapter 2.
Product Description
2.1. SYSTEM ARCHITECTURE
The C-DOT Network Synchronization Equipment (NSE) consists of a PC type
cabinet which houses duplicated controller and PLL (NCP) cards, duplicated
input/output interface (NIO) cards, and one display card, keyboard card and mother
board. It has the provision to mount two oven-controlled crystal oscillator 8 (OCXO)
required for level 2 operation. The controller card has a software controlled digital
Phase Locked Loop (PLL), microprocessor and related memory, output clock
interface and the display and keyboard interface. The NSE input/output card has
the various types of input interfaces to take in the network clock. It extracts clock
from the input digital trunks and provides standard G.703/10 interfaces for the
output clocks.
One NCP card and one NIO card form a self-contained security block. It can work
with the other copy of these two cards in active/standby mode. Output to/from these
cards are connectorised on the motherboard. The user interface panel indicates the
presence and absence of input clocks/trunks and the status of the PLL in the cards
and the general card status. Each controller card provides two ACIA links, one of
which is used for communication with the mate while the other is used to connect a
VT-220 terminal for remote operations.
Fig. 2.1 and Fig. 2.2 show the equipment front panel and back panel details.
2.2. INPUT CLOCK SELECTION
The input reference clock selection can be automatic or manual. On power on or
reset, the NSE comes up in the automatic mode, wherein it selects one of the input
clocks according to a fixed hardwired priority. The order of priority is CLK0, CLK1,
CLK2. If none of clocks are present or available for selection, then the NSE goes
into the free run mode. The operator can override this selection by going to manual
mode and selecting a clock using the keyboard. If the input clock is present, the
LED corresponding to it will glow green. The LED corresponding to the selected
reference blinks once in 2 seconds (1Hz Freq.).
It may be noted that a clock used as Reference to NSE shall always be taken from a
higher level exchange.
PRODUCT DESCRIPTION
INSTALLATION AND USER MANUAL 7
FRONT VIEW OF NSE
FIG. 2.1
LED PANEL
TEST KEYS FUNCTION KEYS
COPY Ø
TEST
5
Frc Card
Frc Clk
Mode
ACK
6
Select
2
1
Copy 1
Copy 0
Copy 0 Pwr
4
3
Copy 1
Copy 0
MONITORING LED's
FUNCTION KEYS
COPY 1
Target Sys Sts
COPY 0
Sys 1
Sys 0
Sys 2
COPY 1
Sys 0
Sys 1
Sys 2
Frc Card
Frc Clk
Select
Mode
12
3
Copy 1 Pwr
4
BEEPER LOCK & KEY
\DESIGN\NSE-IUM\NSEUMFV
Chapter 2
8 C-DOT NSE
J3 J4 J5 J6 J13
J12
J11
J10
NIO C0
NSE C1
c
b
a
a
b
c
a
c
b
c
a
b
COPY 0 COPY 1
ON ON
FUSE 2A FUSE 2A
REAR VIEW OF NSE
FIG. 2.2
a
cbca
bca
bca
b
J14
J7 J9
J8 J15 J16
NSE C0
NIO C1
a
c
b
c
b
a
b
c
a
c
b
a
W3W4W5
W1 W2
123
SYNC
G.703/10 CLOCK OUTPUTS (FOR E-10B AND MAX-L)
REF_TRK
J20 J19 J18 J17
REF_CLK2 REF_CLK0 8M_2_C0 2M 8M_1_C0 8M_0_C0
TEST_CLK 8M_2_C1 8M_1_C1 8M_0_C1
-48V INPUT RS232 INTERFACE J3, J4, J10 = G.703/10, 2.048 MHz 75 INPUTS
J6 = 2.048 MHz TTL CLOCK OUTPUT
J5, J7, J9, J12, J14, J16 = CLOCK OUTPUTS FOR C-DOT SBM EXCHAMGES
REF_CLK1
FOR DEBUGGING ONLY
SYNC OUTPUT FOR C-DOT SBMs
CHECK INPUTS
J17: PIN No. 2 OF BOTTOM MOST
CONNECTOR BLOCK (ONE INPUT)
J18: PIN No. 2 & 6 OF BOTTOM MOST
CONNECTOR BLOCK (TWO INPUTS)
G.703
J18: CHECK (MONITORING) TRUNKS
J17: POSITION 1,2,3 = REFERENCE TRUNKS
\DESIGN\NSE-IUM\NSEUMRV
PRODUCT DESCRIPTION
INSTALLATION AND USER MANUAL 9
L
FIG. 2.3
NSE POWER CABLE CONNECTIONS
\DESIGN\NSE-IUM\NSEUMPWR
Chapter 2
10 C-DOT NSE
59
6
1114
13 25
9P DTYPE CONN. FEM. 25P DTYPE CONN. FEM.
CONNECTOR AT NSE END
(RS232 INTERFACE)
CONNECTOR AT TERMINAL END
FIG. 2.4
NSE TERMINAL (RS232) CONNECTOR DETAIL
\DESIGN\NSE-IUM\NSEUMRS2
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