GENERAL
VMUX is a highly versatile and programmable PCM multiplexer
based on multiple microprocessors. The Mux comes with a Network Management
Terminal (NMT) through which all the programming and control features of
VMUX are accessible.
VMUX comes with a non-volatile NVRAM whose contents define the
running configuration of the Mux as well as control its operating behaviour
during its run time. The NVRAM comes pre-configured to certain default settings
from the factory, which configures it to a typical operating environment. From
the NMT the user can see these values as well as alter them to suit the
specific requirements of the Mux at site.
Once properly programmed, NMT is not required for day to day
operation of Mux as the Mux automatically scans the hardware and network lines for
alarm and abnormal conditions and takes appropriate alternate actions defined
by the user. A number of LED indicators on the VMUX cards as well as on the
bay also continuously display the Mux status at all times. NMT can however be
used to display detailed network status, to run diagnostics and to make further
changes to the Mux programming if required.
6.2 SETTING UP NMT
Opening screen displays PUNCOM Versatile Multiplexer, VMUX &
the current software version. After pressing the ‘Enter’ main menu screen is
displayed which is as follows.
1. Status
2. Routing Tables
3. Conference Set up
4. Hardware Set up
5. User Options
6. Maintenance
7. Administrative Login
8.
Administrative Logout
9.
Diagnostics
Enter your selection (1
to 9)
After the user enters his selection other menus are displayed to the
user to solicit further selections from him and/or display him the information.
This Main Menu and all other menus displayed to the user are given in Appendix
A of this manual.
The various user options and functions related to setting up the
hardware environment of VMX-0100 and are detailed below.
STATUS (USER SELECTION 1)
This menu further displays the following options:
(i) System Status:
This user option displays the system status, which includes bypass
status, no. of major alarms, no. of minor alarms & sync. Source etc.
(ii) Trunk Status:
This screen displays trunk enable/disable status, loopback status,
major/minor alarms present.
(iii) Channel status:
This screen displays each channel’s status, its settings & alarm
status pertaining to the channel.
ROUTING
TABLES (USER SELECTION 2)
CONFERENCE
SETUP (USER SELECTION 3)
HARDWARE SET UP
(USER SELECTION 4)
A further user screen 4.0 is displayed in response to user selection
4. Under this selection following options are available:
( i ) Configure Trunk
(User Screen 4.1)
This screen allows enabling/disabling of the selected PCM trunk,
framing format, CRC enable/disable & line impedance etc.
(ii) Configure Slot
(User Screen 4.2)
This screen allows the user to configure a particular slot for a
required user interface. If auto-learn mode is executed, the system
automatically configures itself for the given card. User can keep maximum 40
physical ports configured as either VF and Data. During run time the system
detects the type of card actually present in the system and activates the
required programming.
(iii) Channel Configuration
(User Screen 4.3)
This screen allows user to
configure a particular channel for specific type. In this screen the specific
parameters of a particular channel of already configured slot, can be selected.
(iv) Erase Hardware Set up (User Screen 4.4)
This option can only be activated by administrative user and
initialises the entire hardware to default configuration.
Under user options, the user programs following items:
(i) Set Time (User Screen 5.1)
In this screen the
user can change current Time, Date & Day.
(ii) Edit Password (User Screen 5.2)
Password editing is
however allowed only if user gives his level’s password.
(iii) Power-up Routing Table (User Screen
5.3)
VMX-0100 maintains upto 4 routing tables any of which can be active
at a time. This entry defines the routing table number, which shall be
activated at power on. It is also possible to activate the last active routing
table at power on.
(vi) Time of Day reconfiguration (user
screen 5.4)
Through this screen upto five events (time of day and date) can be
specified at which specified routing table numbers shall be brought into
activation.
(vii) Select sync source Priorities (User
Screen 5.5)
Through this screen the network sync clocks and their priorities are
defined. The highest priority clock is automatically selected.
(viii) Major/Minor alarm Settings (User Screen
5.6)
This screen allows the user to define each possible alarm in the
system as either major / minor / none. It also allows user to define thresholds
for the alarms.
MAINTAINANCE (USER SELECTION 6)
Through this menu the user is provided with several options, which
can be used for the fault finding or the routine maintenance. Under user options,
the user programs following items:
(i) Display Hardware (User Screen 6.1)
This screen displays all the configured & the actually present
cards in the system.
(ii) Loopbacks (User Screen 6.2)
This user option
further provides the option for:
·
System Bypass
·
Loopback Trunk
·
Loopback Channel
The various loopbacks can be initiated for the desired period of the
time.
(iii) Display Alarm History (User Screen 6.3)
User can see the 100 entries deep alarm log file, which provides the
Alarm, Alarm Type, Alarm Generation Time, Alarm Clearing Time etc.
(iv) Erase Alarm log
(User Screen 6.4)
This option can only be activated by administrative user and
initialises the entire alarm log.
(iv) G821 Statistics
(User Screen 6.5)
This option allows the user to see the G.821 Statistics for past 24
Hrs. & current Hr. for both the trunks. It also provides the option to
restart G.821 statistics.
ADMINISTRATIVE
LOGIN (USER SELECTION 7)
There are three different levels of of login, which provides
different privileges to the users. These levels are:
·
Level 0 (User Mode): The system automatically logs in the user mode, when VT-100 is
connected to it. In this mode the user can view the settings along-with the
system status. In this mode the user is not allowed to change the programming.
·
Level 1 (Supervisory Mode): To modify/update settings, user has to login in
supervisory mode. The entry to supervisor mode is protected by passwords, which
the user must enter correctly to be able to login in supervisor mode. In supervisory
mode only those settings can be changed which do not disturb the traffic. These
include VF gains etc. The default password is 123 and can be changed to other
codes by the user.
·
Level 2 (Administrative
Mode): The administrative level password gives
access to modification of all operational parameters and settings. The default setting of the password is 1234
and can be changed to other codes by the user.
Once changed, the new passwords can only be used and must be
remembered by the user. In case of accidental loss of level 2 password code,
only way to get back to 1234 code is by loading default settings wherein the
entire hardware is re-initialised.
ADMINISTRATIVE LOG
OFF (USER SELECTION 8)
Log off command is used to log off from the supervisory/administrative
mode. The system also automatically logs off if no Keyboard entry from NMT is
received for five minutes. This is to safeguard against the supervisor
accidentally leaving the terminal logged in supervisor mode.
DEFAULT SETTINGS
FOR USER INTERFACE CARDS
(i) For VF Interfaces
|
Card Type
|
Port Type
|
Tx dBr
|
Rx dBr (dB)
|
|
E&M
|
4W E & M
|
-3.5
|
-3.5
|
|
FXO
|
FXO
|
0
|
-2.0
|
|
FXS
|
FXS
|
0
|
-2.0
|
(ii) 64
Kbps G.703 Data Interface
|
Card Type
|
Port Type
|
|
G703 Card
|
64 Kbps G.703 Co-directional I/F
|
(ii) Low Bit Rate Data Interface
|
Card Type
|
Port Type
|
|
UDT Card
|
9600 baud V.24, async Data
|
Other Settings:
No. of Data bits: 8
No. of stop bits: 1
Parity: Disabled
Handshaking: Disabled
(iii) N * 64 High Speed Synchronous Data
Interface
|
Card Type
|
Port Type
|
|
N * 64 Kbps Card
|
N = 1 to 30, V.11/ V.35, Synchronous
|
Other Settings:
Handshaking: Disabled
Clock Mode: Sync Internal
(iv) ISDN Digital Subscriber Line Interface
|
Card Type
|
Port Type
|
|
UIF Card
|
LT
|
Other Settings:
Line rate: 64 / 128 Kbps
(v) N*64, G.703 / Fractional E1 interface
|
Card Type
|
Port Type
|
|
FE1 Card
|
N = 1 to 30, Bit rate of
2048+ 50 ppm
|
Other Settings:
Termination Impedance : 75 Ohm
NMS Working : Disable
DEFAULT SETTINGS
FOR CLOCKS
|
Priority 1
|
PCM1
|
|
Priority 2
|
PCM2
|
|
Priority 3
|
DCLK
|
|
Priority 4
|
EXT. 2M
|
|
Priority 5
|
INT. 2M
|
DEFAULT SETTINGS
MISCELLANEOUS
(i) Passwords:
Level 0 (User)
: No Password
Level 1 (Supervisory) :
123
Level 2
(Administrative) : 1234
(ii) Time of Day event:
None Selected
(iii) PCM Trunk Settings
PCM 1 Framing Format - Standard
Signalling
Format - CAS
CRC4 Enabled
PCM2 Framing Format - Standard
Signalling
Format - CAS
CRC4 Enabled
