tct-3 programmable digital drop-insert e1 multiplexers
TRANSCRIPT
TCT-3
Programmable Digital Drop-Insert
E1 Multiplexers
WEBFIL‘S FLEXI MUX
Chapter 1
Webfil Fleximux Programmable
Digital Drop-Insert E1 Multiplexers
Webfil Fleximux
The Fleximux is a programmable Add/Drop multiplexing equipment
It combines voice and data traffic into a 2.048 Mbps stream. This equipment is manufactured and supplied by
Webfil Limited. The Add/Drop feature of the Fleximux is realized
through the use of a high performance time/space non-blocking cross-connect switch
It has four independently controlled serial time division multiplexed buses.
Conferencing of voice is done through a separate
digital signal processing circuit in digital format.
All the signaling information is handled by a
microcontroller.
Digital Conference is done on any three voice slots in
a separate digital signal processor.
Conference can be three way (full conference) or two
and half way(semi-conference) as required by the
user.
Webfil Fleximux
Basic Flexi-MUX Sub-rack / Front Panel
PS
U
Au
xilia
ry
PS
U
NE
TW
OR
K
INT
ER
FAC
E
Module
T
RIB
UT
AR
Y
Module
Slots for Channel Access Module
TS
1 to
TS
4
TS
5 to
TS
8
TS
9 to
TS
12
TS
13
to
TS
17
TS
18
to
TS
21
TS
22
to
TS
25
TS
26
to
TS
29
TS
30
& T
S 3
1
TS
30
& T
S 3
1
J2
J6
J1
J5
P23
J15
P32 P31 P30 P29 P28 P27 P26 P25 P24
NMS PORT
J13
J16
Port # B
External
Clock
Input
Power
Supply
Socket
Equipment
Earthing
Chl Chl Chl Chl Chl
17 13 9 5 1
to to to to to
20 16 12 8 4
Chl Chl Chl Chl
29 29 25 21
& & to to
30 30 28 24
Basic Flexi-MUX Sub-rack / Rear Panel
Port # A
OUT/75Ω OUT/120Ω IN/75Ω
IN/120
Ω
J10 J9
Port # C
Access to the 2 Mb ports are available from the back plane from the rear side
Separate connectors are available for 75 ohms &
120 ohms impedance matching
The back plane also provided a D-shell 9 pin
connector for interfacing the V-24/RS232 serial link of NMS
NMS can also be accessed from RJ11 jack located
at the front of NIM
Webfil Fleximux
System Architecture of Flexi-MUX
Network
Interface
Module
Tele signal
Inputs (4)
Tele
command
Outputs (2)
Network
Interfac
e RS232C/RJ11
Tributary
Module
Tributary
Port# A Port# B
Power Supply
HSB (1+1)
-48 V, DC
A: Adaptor Modules a. 4W/2W E&M b. Subscriber/Hotline Interface c. Exchange Interface
A
Voice
Interface
Low speed Data
1200-19.2K
V.24/RS232C
High Speed Data
64 Kbps
G.703/V.35/V.36
Broadband Data
nX64 Kbps
V.35/V.36 A A A A
IDSL
64/128 Kbps
“U” Interface
E1 Branching
2.048 Mbps
75/120 Ω
+5V +10V -10V
+80
V
Power Supply Module
The power supply unit operates from -48V supply
The input power is fed through a surge protector
and a filter section to protect the system from
high voltage spikes and lightening Spikes coming
along the power line
The out puts are +5V, ± 10V and +80V
Three outputs are mutually isolated with each other
The card has under-voltage and over-voltage alarm
for both input and output
Network Interface Module (NIM)
The Network Interface Module primarily takes care
of alarm acquisition function
It collects alarms from various internal and external
sources and responds to the queries and
commands issued by the Network Manager through
the ―Super Net‖ Network Management System
The Network Interface module is used for exchange
of information among the Network Manager, the
Tributary Module and the various access modules
interconnected via the back plane.
It has altogether four communication interfaces
for information exchange.
The network management system is realized
through two serial interfaces, one for external
NMS for interfacing the central supervisory
computer while the other is used for realizing the
NMS through the unused National bits of the 2
MB stream.
Other than these, the tributary unit is
interconnected through a serial link while the
access modules are interfaced through another
serial bus.
Network Interface Module(NIM)
Tributary Module & its functions
The Tributary Module is the heart of the system which
interfaces to the 2 Mbps stream and realizes the add-
drop function of the channel through digital cross-
connect
Extract the master clock (MCLK) of the Network from
the incoming 2 Mbps streams. The node is made
synchronized to the MCLK.
Synchronize the phase of the incoming 2 Mbps streams
and also that of the internal 2 Mb bus for local access.
Cross-connect 64 Kbps digital data along with signaling
data.
Perform PCM summing of Conference channels along with logical summing of corresponding signaling data.
Generate 2 Mbps internal TDM bus for channel units.
Generate 2 Mbps HDB-3 encoded interface signal
complying with ITU-T G.703.
Collect and analyze equipment and line faults and take necessary actions.
Tributary Module & its functions
Control jitter to a limit well below the ITU-T limit
(G.823).
Report to Network Interface module about alarm status of E1 stream & module
Support a communication channel through the use of National bits of TS0 for Network Monitoring and Control.
Tributary Module & its functions
Voice Access Module
The ultimate objective of the Flexi MUX is to add/drop
selective time slots from the time multiplexed 2 Mb
data stream for local access of voice and/or data.
Each access modules accommodates four channels
per card
The following standard interfaces are supported by
the Voice Access Module.
2W/4W E&M Interface
Subscriber Interface
Exchange Interface
Hot Line Interface
Voice Access modules(2W/4W E&M Interface)
For 4W interface circuit, the voice is extended through a
pair of balance line for both transmit and receive.
Separate line transformers are used for this purpose.
The impedance is matched for 600 ohms.
Signaling is provided by separate E and M leads.
M lead provides the incoming signaling which is sensed
by an opto-isolator.
Voice Access modules(2W/4W E&M Interface)
The user‘s equipment normally extends earth or no-
earth which is sensed by the opto-isolator against
the primary -48V.
E-lead provides the outgoing signaling and it
extends earth or no-earth through a transistor
acting as a solid- state switch.
For 2W interface of voice, both the trans and receive
voice is fed to the outgoing transformer working in
hybrid mode.
Subscriber interface is normally used for extending a
voice to the plain old telephone sets (POTS).
In this interface both the signaling and voice is sent
over one pair of wire.
The unit provides talk current from the primary – 48V
source for the operation of the telephone set.
Hook condition and dial pulses are sent by
interrupting the loop current in the handset.
The interface also has built-in ringer to buzz the
phone for incoming calls.
Voice Access modules (Subscriber interface/ Hotline interface)
Mode Jumper Pins
Subs E1, E2, E3, E5 2, 3
E4 3, 4
Hotline E1, E2, E3, E4, E5 1, 2
Hot line is basically subscriber to subscriber interface.
Depending on the off-hook status at one end, the ringer is
activated at the other end. The ringer is automatically
deactivated as soon as the handset is lifted.
After the conversation is over, both the user will have to
comeback to the on-hook condition to enable the ring
again. To make the subscriber work as hotline or vice versa
following jumper settings are to be done.
Voice Access modules (Subscriber interface/ Hotline interface)
This interface is used for interfacing the exchange
side of a subscriber line.
Depending on the hook status of the subscriber,
the exchange interface extends loop to the
exchange.
It basically emulates the function of the telephone
to the exchange and reproduces the voice and
signaling of the telephone set.
It also senses the ring and loop reversal condition
which is sent to the subscriber interface for
reproduction.
Voice Access modules (Exchange Interface)
One 64 Kbps data card caters for two 64 Kbps co-
directional data channel which conforms to ITU-T G703
requirement.
Each channel consists of a general purpose line
interface chip (XR-T6164).
It contains both transmit and receive circuitry to interface
TTL signal either from or to a twisted pair cable in
conjunction with the XR-T6l64,
The XR-T6165 will form a ITU-T G.703 compatible 64
Kbps data adaptation unit, interfacing between 2048
Kbps PCM highway and a variable length twisted pair
cable.
Data Access modules (64 Kbps (G.703) data interface)
The Low Speed Data Module is primarily meant for
extending asynchronous low speed RS232C data
circuits through the flexi mux.
The module works in bit transparent mode and
acts as a data pipe irrespective of the data.
It can also work in synchronous mode in which
case the incoming and outgoing data will have to
be synchronized to the clock signal provided by
the module (contra directional data).
Data Access modules
(Low speed digital data module)
Each time slot of the 2 MB frame provides a bit rate of
64Kbps.Low speed data channels can very well be
accommodated into such a high bit rate channel. However, for better utilization of the information
bandwidth a V.110 sub-multiplexing format is used to
support multiple low speed data on a single time slot.
This module supports baud rate ranging from 600
baud to 19.2K baud. The no. of bits of a time slot
required is Up to 4800 baud
9600 baud
19.2K baud
1 bit
2 bits
4 bits
Time slots TS30 and TS31 are extended to slots
12&13 slots of sub rack
Data Access modules
(Low speed digital data module)
It creates a third tributary by cross connecting the required time slots from Trib-A or Trib-B to Trib-C.
By this module it is possible to create a spur link by diverting the required time slots without dropping channels at voice/data level.
All the NMS functions are available in spur link
Access modules / E1 branching module
Digital Subscriber Line Module
It is designed to provide ISDN basic rate access (2B+D) at U-interface
NX64 data Module
Designed to extend the WAN-based data network or video conferencing circuits through primary mux.
It works in synchronous mode with V.35 interface
with clock slaved from data communication equipment.
The module supports configuration from 64Kbps
(N=1) up to 1920Kbps(N=30)
Access modules
Webfil Super net Management System (WSMS) Version
4.0, is a window based network management system
(NMS)
Designed to configure and control FLEXIMUX Equipment.
It can process information, in real time mode, received
from all fleximux equipments connected in a network.
With the help of this software, one can also monitor health
of a particular equipment and network.
Network management & Supervision
Programmable Features
Configuration of different Access Module as per
Interface and requirement
Assignment of Channel Cross-connect table
Configuration of channel assignment for various
alarm conditions
Designation of external alarm as major/minor alarm
Network management & Supervision
Monitoring Features
All recommended Tributary and system related alarms
Link performance with G.821 analysis
External Supervisory alarm status
Equipment temperature and input voltage
Diagnostic Features
Loop back facilities both at entire and fractional E1 level
Bypass facilities both at entire and fractional E1 level
Milli-Watt Tone (1KHz) Injection
Integrity of interface module in the equipment
Network management & Supervision
Real time monitoring of network.
Execution of various Diagnostics &Tele commands
Configuration of Card Type & Parameters.
Configuration of Timeslots.
Status & Alarm history logging.
Viewing of logged data with specified query.
Performance monitoring of equipment and network.
Basic functions of WEBFIL
SUPERNET MANAGEMENT SYSTEM
The various information/command downloaded from the Network Management System (NMS)
Channel Cross-connect table
Interface Configuration table
Status Response command
Diagnostic command
Alarm History Upload command
Global Time-set command
The cross-connect table defines the configuration
of the multiplexer at a particular site.
It determines which of the 30 channels from the 2
MB bus to be dropped and which channels to be
passed through or which channels to be stopped.
The table also defines which are the channels to
be operated in conferencing mode.
The tables downloaded from the network manager
is stored in non-erasable Electrical Erasable Prom
(EEPROM).
Cross-connect table
Main
2M
Main
2M
Local
Main 2M
Main 2M
Local
Main 2M
Main 2M
Local
A
C
B A
C
B A B
Main 2M
Main 2M
Local
M ain 2M
Main 2M
Local
A
C
B A
C
B
onnCe
Cross-connect table Linear (point to point)
Conference Semi-Conference
Linear (point to point) Linear (point to point)
Six cross-connect tables are there to take care of the various conditions of the network.
Cross-connect table for normal operation
Alternate cross-connect table when A-tributary is
having major alarm. (Faulty – A)
Alternate cross-connect table when B-tributary is
having major alarm. (Faulty – B)
Modified cross-connect table when A-tributary
receives a remote alarm.(Remote – A)
Modified cross-connect table when B-tributary
receives a remote alarm.(Remote – B)
Digital Bypass.
Cross-Connect table
Normal configuration with monitoring and
master clock selection from End Terminal:
1 2 3
A D/I B A D/I B B ET A
A ET B
4 2 2
D/I A B D/I A B
3 3
D/I
A B D/I A B
1 1
A B ET ET A
4 4
A ET B ET A B
Clock (Internal)
NMS(Master &
internal)
Clock (Extracted)
Tributary ―A‖ master
NMS (Slave&
internal)
Clock (Extracted)
Tributary “A” master
NMS (Slave& internal)
Clock (Extracted)
Tributary ―A‖ master
NMS (Slave&
internal)
E1 Link
Normal configuration monitoring and master
clock selection from Drop/Insert Terminal:
2 1 3
AA DD//II BB
AA DD//II BB BB ETET AA AA ETET BB
4
ET ET D/I D/I A A B A B A B
Clock (Extracted)
Tributary “A” master
NMS (Slave& internal)
Clock (Internal)
NMS (Master&
internal)
Clock (Extracted)
Tributary “B” master
NMS (Slave& internal)
Clock (Extracted)
Tributary “A” master
NMS (Slave& internal)
E1 Link
Protected configuration of Flexi MUX Terminal with
monitoring and master clock selection from Any Terminal:
1 2 3 4
A D/I B A D/I B B ET A
A ET B
2 2
D/I A B D/I A B
3 3
D/I
A B D/I A B
1 1
A B ET ET A
4 4
A ET B ET A B
Clock (Internal)
NMS (Master&
internal)
Clock (Extracted)
Tributary ―A‖
master
Clock (Extracted)
Tributary ―A‖
master
Clock (Extracted)
Tributary ―A‖
master NMS (Slave& internal) NMS (Slave& internal) NMS (Slave&
internal)
Protected Network Configuration of Flexi MUX
Terminal with SDH systems
1
B ET A A D/I B
3
A D/I B
4
A ET B
SD
H
AD
M
SD
H
AD
M
SD
H
AD
M
SD
H
AD
M
E
1
Clock (Internal)
NMS (Master& internal) MUX set as Protected
E/T
Clock (Extracted)
Tributary ―A‖ master
Clock (Extracted)
Tributary “A” master
NMS (Slave& internal) NMS (Slave&
internal)
Clock (Extracted)
Tributary ―A‖ master NMS (Slave& internal)
MUX set as Protected
E/T
E
1 E
1
E
1
P
1
P
2
STM # N Optical Link
2 P1 P2 P1 P
2 P
1
P
2
NM
S
Protected Network Configuration of Flexi MUX
Terminal with SDH systems
1
B ET A A D/I B
3
D/I A B
4
A ET B
SD
H
AD
M
SD
H
AD
M
SD
H
AD
M
SD
H
AD
M
E
1
STM # N Optical Link 2
Port # B)
NMS (Master& internal
MUX set as D/I Mode
enabling Port # B
Clock (Extracted)
Tributary ―A‖ master NMS (Slave&
internal)
Clock (Internal)
Tributary ―A‖ master NMS (Slave&
internal)
Clock (Extracted)
Tributary ―A‖ master NMS (Slave&
internal)
MUX set as D/I Mode
enabling Port # B
E
1 E
1
E
1
P
1
P
2 P1 P2
P1
P
2 P
1
P
2
NMS Clock (Extracted
from
E1
Link
E1
Branching
Link
NM
S
Typical Network Configuration of Flexi MUX Terminal
E1
Ring
E1 Branch
NM
S
Typical Network Configuration of Flexi MUX Terminal
Various alarm information in NIM card
Tributary alarms (both for Tributary A & B):
i) RXF (2 Mb loss) – major alarm
ii)
iii)
iv)
v)
vi)
LOS (loss of sync.) – major alarm
RMA (Remote multi-frame alarm) – minor
BER (Bit error rate) alarm – major alarm
RA (Remote alarm) – minor alarm
System related alarms:
i)CNFG (Configuration error)
NMS :- When NMS is connected to the network, this
LED blinks.
BYP :- When the MUX is bypassed by NMS
command, this LED glows.
LED
STATUS
RED
AIS (Alarm indication signal/all ones) – major alarm
RED
AMBER
RED
AMBER
RED
GREEN
AMBER
RED
VARIOUS ALARM INFORMATION IN TRIBUTARY MODULE
TAF: Tributary A failure – loss of 2 Mb signal from A side
TBF: Tributary B failure – loss of 2 Mb signal from B side
INT CLK: Equipment is running in Internal Clock mode
DIG BYP: NMS has activated the digital bypass command
LPBK A: The Tributary A loopback command is activated through
NMS
LPBK B: The Tributary B loopback command is activated through
NMS
Indication Diagnosis Remarks
PSUOK-green steady Input and output voltages are
OK
PSU ERR — yellow steady
Any of the output voltages
has under voltage.
Power supply card maybe
faulty.
Shutdown — red steady
Power supply is shutdown
due to input under voltage or
overvoltage or output over-
voltage.
Line over-voltage or
under- voltage condition
may have occurred.
Otherwise, any short
circuit on the o/p side.
ALARMS
Power Supply card
NIM & TRIBUTARY CARD Indications Diagnosis Remarks
Sys OK –
green steady
Sys OK -
green steady
Indicates that there is no
alarm in the link
A Port
RXF - red
steady
TAF — red
steady
2 Mb loss in A-port.
If the alarm RXF goes off on
loopback, it indicates a failure in
the transmission side.
If the cable connection is OK, then
problem may be with Tributary
card.
AIS - red
steady All ones in A-port. Transmission link failure.
LOS—red
steady
LOS indicates a frame or
multiframe loss.
If the alarm RXF goes off on
Loopback, it indicates a failure in
the transmission side. Otherwise
If
the cable connection is OK, the
problem may be with tributary card.
BER—red
steady
Steady glow of BER
alarm indicates bit error
of more than 1 error bit
in 1000 bits
Probable cause lies with link
performance. If link is OK, then
problem may be with Tributary card.
BER - red
blinking
Blinking BER indicates
bit error greater than
1X10-6 but less than
1X10-3
Probable cause lies with link
performance. If link is OK, then
problem may be with Tributary card.
RA - amber Remote Alarm. Far end problem.
RMA -
amber
steady
Remote Multiframe
Alarm indicates a MF
loss.
Far end multiframe loss. If RMA comes
with RA then adjacent station problem.
B Port
Same alarm,
indication and
diagnosis as A—Port
CNFG alarm blinks when there
Card parameter not
properly configured or
downloaded.
is mismatch between the types
CNYG — red blinking of cards actually plugged in our
MUX and configuration
programmed from NMS.
NIM & TRIBUTARY CARD
Indication Diagnosis Remarks
INT/EXT clock – amber
steady
INT/EXT clock LED glows when system runs with its own clock or external clock and remains off when it extracts from another.
DIG BYP – amber steady
DIG BYP LED glows when DIG BYP
command is executed from NMS.
LPBK A – amber steady
LPBK A glows steadily when local
loopback A command is executed from
NMS and blinks when remote loopback
A command is given.
LPBK B – steady
LPBK B glows steadily when local loopback B command is executed from NMS and blinks when remote loopback B command is given.
NIM & TRIBUTARY CARD
Connecting FLEXIMUX to your NMS (desktop/laptop)
Installation NMs software in your PC
Webfil Supernet management System To
The NMS Startup Screen appears
The Main Menu System :
Setup Equipment Monitor Control History
Help
Qui
t Yes
No Equipment
Local
Network
Single Equipment
All Equipment
Equipment Status
G821 Status
List
Activate/De-activate
Legend Setup
Cross connect Card
parameter
Show
Change Password
User Account
Network Download Clock
Edit Network
Default Settings
Terminal
Global
Description of Menu & Functionality
Creating network in NMS
.
To
monit
Cli
Monitoring of network status la UIPMENT
pment
Maintenance &trouble shooting of network
1.First, select Equipment
Address from the Dropdown
List.
2.Click one of the Control
Command options
and follow on screen
message if any.
3.Click OK and Yes to
confirm.
From the popup screen :
1. Select equipment address :
Maintenance &trouble shooting of network VVIiewing Equipment History :
PUNCOM V-MUX - 0100
Chapter 2
Primary E1 Add/Drop Multiplexer VMX - 0100
PCM1
(2
Mbps)
30 TS
PCM2
(2
Mbps)
30 TS
40 ports
(only 30 usable)
Block diagram of Puncom VMUX - 0100
PUNCOM VMUX 0100
VMX-0100 is 2 Mbps, 30 Channel, highly flexible Add/
Drop Multiplexer with following features:
Provides 40 Voice/data ports.
Supports ISDN compatible U interface port. Supports Nx64 (V.35/G.703) Sync data with ‗N‘ max = 30
Provides 10 Three Party Plus 8 Four Party
Conferences.
VMX - 0100 Features
Provides a variety of fully programmable voice &
data ports.
Fully programmable Locally and Remotely through
NMS.
Synchronization to different user selectable Clock
Sources.
Line cards are slot Independent.
Compliant to all relevant ITU-T recommendations
VMX - 0100 Features
VMX-0100 shelf has 14 slots.
First 4 slots are called reserved slots and these slots
are used for placing power supply & control cards.
Remaining 10 slots (from slot no. 5 to 14) are called
universal slots & these universal slots are used for
placing the user interface cards.
Slot 1 Power Supply (PSU) Card #1
Slot 2 Power Supply (PSU) Card #2 Redundant
Slot 3 TME Card
Slot 4 Loop Protection (LPC) Card (Optional)
Slot 5-14 User Interface Cards (Line Cards)
VMX – 0100 Shelf Arrangement
Front View of VMX-0100
Rear view of VMX-0100
Rear View of VMX-0100
An 8-position DIP switch has been provided on the
motherboard to set the equipment ID.
With 8 positions maximum of 256 ( 28 ) IDs can be
set.
This ID is required for the NMS operation & forms
the address of the NMS basic frame.
E.g. ID of Mux = 101, the equivalent binary code is
(01100101), accordingly DIP switch position is
changed.
Equipment ID
PSU (Power Supply Unit)
Power Supply in the VMX-0100 is DC-DC converter
based on SMPS technology.
Redundant PSU placed in slot no.2
Also generates the 75V rms, 25Hz. ring signal
required for the FXS card.
The input output specifications are as under:
Input:
-36 V to -72V (-48V nominal)
Output:
+5V
+12V
-12V
PWR
O/P FAIL
OFF
ON
- 48V
- 48V
RET
+ 5V
GND
+ 12V
- 12V
PSU
ITEM DESCRIPTION
ON/OFF
SWITCH
Turns the power ON/OFF.
UP Position OFF,
Down Position ON. Power Green LED glows when –
48V input is present.
Output
Fail
LED
Red LED lights when any
of the output voltages i.e.
+5V, +12V or –12V fail.
Monitoring
points
Monitoring points for
input -48V, -48V return,
+5V, Ground, +12V & -
12V
PSU (Power Supply Unit)
HEALTH LED
P1 LOCAL ALARM LED
P2 LOCAL ALARM LED
P1 REMOTE ALARM LED P2
REMOTE ALARM LED CLOCK
ALARM LED
TEST MODE LED NMS POLL TX
LED NMS POLL RX LED
NMT RS-232 CONNECTOR
NMS RS-232 CONNECTOR
NMS ETHERNET CONNECTOR
HEALTH
P1 LCL P2 LCL P1
RMT P2 RMT
CLOCK TES
T
TD NMS
RD NMS
NMS
NMT
NMS
TME
TME (Two Megabit Ethernet) Card
Main controller card
2 Mb generation
Conference piggy on this
card
NVRAM (for storing
programming)
NMS / NMT interface
Clock generation
Item LED
Status LED Function
HEALTH Blinking (Green/Red)
ON Red
Card is working OK.
Card hardware has gone faulty.
P1 LCL ON
Fast Blinking
Fast Blinking
Fast Blinking
Slow Blinking
Slow Blinking
PCM1 Loss of Signal
PCM1 Frame Sync. Loss
PCM1 Multi-frame Sync. Loss
PCM1 CRC Frame Sync. Loss
PCM1 error rate > E103
PCM1 error rate > E106
P2 LCL ON
Fast Blinking
Fast Blinking
Fast Blinking
Slow Blinking
Slow Blinking
PCM2 Loss of Signal
PCM2 Frame Sync. Loss
PCM2 Multi-frame Sync. Loss
PCM2 CRC Frame Sync. Loss
PCM2 error rate > E103
PCM2 error rate > E106
LED indications on TME card
P1 RMT ON
Slow Blinking
Slow Blinking
Slow Blinking
PCM1 Receive AIS (All 1s)
PCM1 Receive Remote FSL
PCM1 Receive Remote MFSL
PCM1 Receive AIS in TS16
P2 RMT ON
Slow Blinking
Slow Blinking
Slow Blinking
PCM2 Receive AIS (All 1s)
PCM2 Receive Remote FSL
PCM2 Receive Remote MFSL
PCM2 Receive AIS in TS16
CLOCK Blinking
ON
Slips
Selected Clock Fail
TEST ON
Card in diagnostics or Loop back Mode
TD NMS Blinking NMS Polls Transmitted
RD NMS Blinking NMS Polls Received
LED indications on TME card
NMS Ethernet
Connector
RJ-45 Connector for connection to NMS on LAN.
NMT
Connector
DB9 female, for
connection to NMT.
Connector pin allocation
is described in this
section later. This port
is configured as DCE.
NMT
Connector
NMS RS-232
Connector
DB9 female, for
connection to PC-Based
NMS, Connector Pin
allocation is described in
this section later. This
port is configured as
DCE.
NMS RS-232
Connector
LED indications on TME card
Three cards for all VF Interfaces:
E&M 2W/4W
Exchange Interface (FXO)
Hot Line / Subscriber Interface (FXS)
All VF ports are programmable for gain setting and
interface selection.
Remote and Local loop backs for easy network
diagnosis.
Line cards (VF Interfaces)
Omnibus Voice Circuits are defined as the circuits
(in the network) where all the participants can
listen and talk simultaneously.
Although as a protocol/ for intelligible
communications only one person talks at a time.
Omnibus Voice Circuits are Implemented by
using conferencing facility in individual
multiplexers.
Omnibus Voice Circuit (Using E & M card )
MUX
3-Party Conferencing 4-Party Conferencing
MUX
+ +
MUX
MUX
+
Omnibus Circuits using PD MUX Conferencing
DTMF selective signaling is used to ring any
particular station or a group.
Remote stations can call the controller using voice
calling.
As the signal gets added at every station, local
cable noise is also added to the conference.
Poor cabling or very long-links can cause DTMF
signaling to fail, and render the circuit useless.
Omnibus circuits should be preferably setup on 4
wire basis as even small echo due to poor return
loss on 2 wire devices can cause DTMF signaling
to fail.
General Features of Omnibus Circuits
4 Wire E&M Trunk And FXO-FXS
Remote Subscriber Extension Applications
MUX MUX MUX
4W
E&M
4W
E&M
FXS E&M FXO E&M
Exchange A Exchange B
GDT card (G.703 Data card): This card provides 4 channels of G703
Data interface for 64 Kbps data
applications like PRS, UTS
DAC card (Data Acquisition card):
This Card has the features of
System voltages monitoring like PSU
voltage.
8 auxiliary dry contacts for controlling 8
tasks.
6 analogue inputs for monitoring the
environmental parameters like
temperature.
Other Interface Cards
Use of LPC and 2 E1s at every station
for all time-slots protection
Switching in LPC in case of failure of E1/ OFC cut
between terminal station and immediate next station
Switching in LPC in case of failure of E1/ OFC cut
between two intermediate stations
In case of multiple cable cuts in a single protected section,
the stations on either side of the isolated section (section
isolated by two cable faults) get directly connected.
Multiple Cuts Scenario:
Isolation and overreach problems
Configuration of PD MUX using NMS Software
Set laptop / PC‘s (in which NMS software is
installed) IP address as 10.X.Y.Z (where X,Y, Z can
be any number from 1 to 255), Subnet mask as
255.0.0.0 & no default gateway.
Mux IP address is 10.10.10.1 We can access Mux
locally through this IP on any internet browser.
Set MUX ID & add this ID on NMS
User name is ―web‖ & password is ―web‖ too
There are 4 routing tables to store programming. By
default Routing table no. 1 is active.
There are 5 types of clocks - PCM 1, PCM 2,
internal, external & data.
Network Layout
Configuring a Location
Configuring Alarms
Troubleshooting chart for Puncom’s Mux
Alarm Condition Possible Cause Action Suggested
PSU‘s ―PWR‖ LED
ON
& ―O/P FAIL‖ LED off
Normal condition of the card No action required.
PSU‘s ―PWR‖ LED off The power cable for the PSU on the
motherboard is not connected /
corresponding MCB on BTP is off.
Connect the power cable / switch on
the MCB / check the connections on
BTP.
PSU‘s ―O/P FAIL‖
LED
red
One or more of the PSU‘s output
has failed Replace the PSU.
TME‘s ―Health‖ LED
blinking Red-Green &
all other LEDs off
(except TDNMS
blinking)
Normal condition of the card No action required.
TME‘s ―Health‖
LED red
permanently
TME has gone faulty
Replace TME & program
accordingly.
P1 / P2 ―Local‖ LED
ON
Problem in STM See the Rx port of STM. If it‘s red, the
fibre has broken or cross connects not
configured in STM. Check STM / fibre.
Mux has hanged Reset the Mux by switching it OFF & then
ON & wait for few minutes. The alarm
should go. If it doesn‘t go to next step.
Wiring between Mux & STM (via DDF)
has become loose or has broken up.
Check wiring between Mux & STM.
Correct it, if found loose. Still problem
persists, change TME card.
P1 / P2 ―Remote‖ LED
glows
Problem at remote site i.e. next station
to which P1 / P2 (as the case may be)
is connected or fiber break.
Check other station for faults / rectify fibre
break.
P1 / P2 ―Local‖ LED
blinking
Errors at the local site Wiring may be loose between STM & Mux
P1 / P2 ―Remote‖ LED
blinking
Errors at the remote site Wiring may be loose between STM & Mux
on the other site to which P1/P2 is
connected.
Clock LED blinking /
permanently glowing
Blinking implies slips & permanently
glowing means clock has failed
Check clock settings through NMS.
Settings may be wrong or primary clock
has failed
Test LED glowing
Card in diagnostics or Loop back Mode
Remove the loopback 1
Troubleshooting
TDNMS LED blinking NMS is working No action required
LPC Health LED green LPC is working ok No action required
LPC
glows ―P
1
fail‖ LED P1 has broken & system is working on
protection if TME is normal
Correct the primary link connected to P1
as early as possible. (If TME is normal)
LPC
glows ―P
2
fail‖ LED P2 has broken & system is working on
protection if TME is normal
Correct the primary link connected to P2
as early as possible. (If TME is normal)
Health LED of any line
card like
E&M,FXO,FXS blinking
Card‘s hardware is OK but it is not
configured by main TME card
Configure the card through NMS
Health LED of any line
card like
E&M,FXO,FXS green
Card is working OK No action required
Health LED of any line
card like
E&M,FXO,FXS red
Card has gone faulty Replace the card
Test LED of any line
card like E&M,FXO,FXS green
The respective port is in loopback
mode
Remove the loopback through NMS for
normal working of the port
Troubleshooting
Thank you