Alcatel Canada 24T28A01D22C 7390 24 GHz Co-Pol RBS User Manual BS Manual pages 285 to 302

Alcatel Canada Inc 7390 24 GHz Co-Pol RBS BS Manual pages 285 to 302

BS Manual pages 285 to 302

3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 285/302
286
Appendix 5 – Correspondence between commercial
codes and industrial codes relating to the BS
Installation item Commercial code Industrial code Comments
DBS basic configuration
Rack 22 U 9900CAB001 3CC 10067 AAxx
DBS installation items
Power S. cable POWCAB0001 77096649 15 m 3x10 mm2
Distributor Panel
16x2 Mbits/s
9900XXI416 3CC 08061 AAxx
2x3CC 11236 AAxx 75 Ohms / 1.6 /
5.6
9900XXI416 3CC 08061 ABxx
2x3CC 11237 AAxx 75 Ohms / BNC
9900XXI416 3CC 10316 ABxx
2x3CC 11238 AAxx 120 Ohms - EMC
RBS installation items
Grounding cable
(20 meters) 9900XXC502 3CC 08166 AAxx
(per meter)
Consummable 9900UXT002 3CC 06503 AAxx
50 Ohms coaxial cable
(50 meters) 9900UXI202 50 m of
1AC 001100022
Coaxial connector 9900UXI203 2 x 1AB 095530021 (x2)
Grounding kit 9900UXI204 1AB 128500002
114 mm tube (2 meters) SUPOUTD001 3CC 04658 AExx
2 pole-mounting fastening kit
(1+1) 9900UXI104 3CC 11681 AAxx
Self supporting mast 114 mm
(1.5 meter) SUPMAST001 3CC 05148 AAxx
Cable tray cablofil (6 m) INFRA00003 3CC 07580 AAxx
Cable tray PVC (4 m) INFRA00004 3CC 06511 AAxx
Cable tray CES (12 m) INFRA00005 3CC 06759 AAxx
Gaine Capri (12 m) INFRA00006 3CC 06512 AAxx
Cable LDF 4-50 9900WVG001 77 096 434 50 Ohms (10 m)
N Connector kit 9900UXX022 77 096 433 N male right,
1 for each cable
LDF4-50
286/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
286
Installation item Commercial code Industrial code Comments
Jumper 9900WVG004 3CC 09514 AAAA N male bented/
Nmale right (3 m)
Jumper 9900WVG005 3CC 09514 ABAA N female bented/
N male right (3 m)
RBS installation tools
Tool kit 9900UXT103 3CC 08409 AAxx
PC 9900LT
Laptop PC French
(incl. Ethernet module) 9900LTH001 3CC 10939 AAxx
Desktop PC French
(incl. Ethernet module) 9900LTH002 3CC 10626 AAxx
Laptop PC English
(incl. Ethernet module) 9900LTH001 3CC 11200 AAxx
Desktop PC English
(incl. Ethernet module) 9900LTH002 3CC 11201 AAxx
NFS Server software
LT application software
CDROM
Embedded software
package CDROM
CDROM User Manual
2.1 of 2.2.a
9900LTS001
1AH 00845 AAxx
3CC 12142 AAxx
3CC 12012 AAxx
3CC 12144 AAxx
3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 287/302
292
Appendix 6 – Error messages and corrective actions
The tables below list the main error messages when operating 7390 LT.
The purpose of this chapter is to give, for each message, an additional information and to suggest one
or more corrective actions. However, various causes may originate malfunction and it may occur and
derive one from another; thus the corrective action suggested may not be the only solution. Furthermore,
the operator is, in some cases, free to take initiative to solve the problem, considering that
troubleshooting should take into account the configuration context.
Whenever the malfunction is not fixed, please contact TAC (see page 3).
A.6.1 – Error messages for 7390LT software
A.6.2 – NT management error messages
Message Definition Corrective actions
Error in craft.ini file 7390LT software can not be laun-
ched, its configuration file contains
errors. The errored parameter name
is displayed on the screen.
The solution requires an
intervention at the craft.ini file
level. Only qualified personnel
should intervene.
For this purpose, please contact
the TAC (see page 3).
An error occured when
opening the Data Base 7390LT can not retrieve its data
base files. Make sure the .mdb files are ins-
talled in the database directory. If
not, install again 7390LT (see
Appendix A.2).
Info model version com-
patible When connecting to a BS, the data
base versions differ on agent and
manager side: e.g.: the 7390LT is
version 2.1 whereas the base sta-
tion is version 2.0.
Perform download of the appro-
priate software version (see §
7.3.10).
Message Definition Corrective actions
Error when declaring the
new NT Declaring the new NT is denied. Make sure that:
.the serial number is valid,
(preceded by 4 dashes then CU
follow-up by 1 dashe)
.the associated AMD board
configuration is fully carried out.
An NT with this index
already exists The NT identification number ente-
red is already assigned to another
NT.
Assign a free number. Contact
the scheduler.
Waiting NT characteris-
tics This message displays a system
status and shows no anomaly. At
the end of the NT creation, the sys-
tem is waiting for information about
it.
Please, wait until the relevant
information is transmitted.
Error at the reception of
SNMP message: Error
when destroying the NT.
The NT destroy control is denied,
one of its ports being used by an IP
cross-connection or leased lines
(LL).
Delete all IP or LL cross-connec-
tions that use the NT ports
before initiating the NT destroy
control.
288/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
292
A.6.3 – Error messages for communication between BS and 7390LT
A.6.4 – Error message linked with client services
A.6.4.1 – Error messages linked with E1 leased lines
Message Definition Corrective actions
An error occured at the
BS connection: Error
when declaring the
manager
Declaring the manager is denied. Make sure that no other LT
session is active (see section
4.3.1).
Connection failure: NE
not found The communication establishment
with BS at the IP level failed. .Check the IP level link with BS.
.Check if the cable fits to your
network configuration (crossed or
no Pc-DBS ethernet cable).
TIMEOUT on request No answer to SNMP request when
timeout expired. One of the causes
may be a communication
interruption between the BS and the
PC on which 7390 LT is installed.
This interruption may be brief. If this
problem is persistent, the message
"The connection with the NE has
been lost. The Craft will be re-
initialized" comes to confirm a
permanent cut.
If the interruption is brief, the
malfunction will disappear
without any intervention being
required. In case of a permanent
cut, refer to the following mes-
sage: "The connection with the
NE has been lost. The Craft will
be re-initialized".
The connection with the
NE has been lost. The
Craft will be re-initialized
Permanent cut of communication
between the BS and the PC on
which 7390LT is installed.
Start again the 7390LT. If the
problem persists, check all ele-
ments involved in the connection
between BS and PC.
Message Definition Corrective actions
Already involved in ano-
ther cross-connection Creation control for a leased line
denied, assigned TSs being already
used by other cross-connections.
Try to create another leased line
using available TSs.
A cross-connection
exists on the TNT port
N°xxx
Creation control for a leased line
denied, another line using the port
N°xxx of the TNT.
Try to create another leased line
using available TNT port (see the
cross-connections list in section
4.11.4.1).
A cross-connection
exists on the NT port
N°xxx
Creation control for a leased line
denied, another line using the port
N°xxx of the NT.
Try to create another leased line
using available NT port (see the
cross-connections list in section
4.11.4.1).
Error when creating the
cross-connection: not
enough downstream
resources allocated.
Creation control for a leased line
denied because of a lack of resour-
ces for the upstream communica-
tion.
Check the upstream channel
traffic using the supervision (see
section 4.7).
Error when creating the
cross-connection: not
enough upstream resour-
ces allocated.
Creation control for a leased line
denied because of a lack of resour-
ces for the downstream communi-
cation.
Check the allocation with the
scheduler.
3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 289/302
292
A.6.4.2 – Error messages linked with IP "cross-connection"
A.6.4.3 – Error messages linked with circuit emulation
The selected ports must
be configured identically
before selecting a TS
(Time Slot).
Creation control for a leased line
denied because the selected ports
have a different configuration.
Check the configuration of the NT
and TNT ports (see section
4.11.1.3). Perform any relevant
modification.
E1 slots must be conse-
cutive Creation control for a leased line
denied because the time slots num-
bers are not consecutive.
Assign contiguous numbers to
time slots (TS).
Time out on creating the
leased line Creating the leased line did not suc-
ceed at the time out. Carry out data downloading (see
section 4.4.1).
Time out on deleting the
selected leased line Deleting the selected leased line did
not succeed at the time out. Carry out data downloading (see
section 4.4.1).
Error when deleting the
Cross-connection: the
cross-connection on
leased line is not locked
Creation control for a cross-connec-
tion on leased line denied because
it is liable to route traffic.
Lock the cross-connection before
triggering the deletion control
(see § 4.11.4.5).
Message Definition Corrective actions
Error when creating the
Cross-connection:
Down Resource Pro-
blem.
Creation control for an IP cross-con-
nection denied because of a lack of
upstream resources.
Check upstream traffic using the
supervision (see section 4.7).
Error when creating the
Cross-connection:
Up Resource Problem.
Creation control for an IP cross-con-
nection denied because of a lack of
down-stream resources.
Check allocation with the
scheduler.
Error when creating the
Cross-connection: Ether-
net Port already involved.
Creation control for an IP cross-con-
nection denied because the NT
Ethernet port is already used.
see the IP cross-connection list
that displays the used ports (see
section 4.12.2.1). Carry out any
relevant modification.
Error when creating the
Cross-connection:
ATM Port Value error.
Creation control for an IP cross-con-
nection denied because one of the
following values is false: either
"VCL Vpi" or "VCL Vci".
Assign a value within the range of
the possible values (see section
4.12.2.3).
Error creating the cross-
co : ATM Medium type is
not configured
Configure the ATM medium type
(see section 4.9.1).
Message Definition Corrective actions
CES link configuration
failed Creation control for an CES denied
because the TNT port is unlocked. lock TNT port (see section
4.11.1.4)
Message Definition Corrective actions
290/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
292
A.6.5 – Download error messages
A.6.6 – Error message at backup / restore
A.6.7 – Error messages for radio management
A.6.7.1 – Error messages linked to the radio configuration
A.6.7.2 – Radio Resources Manager (RRM)
Message Definition Corrective actions
Software download done
with problems detected. An error occurred during data down-
load. .Check the NFS server status is
operational,
.Chek hardware description for
the BS boards.
.Check the exported directory
has been added to the omni-NFS
server during a session with
adminis-trator rights.
Package commit done
with problems. An error occurred during referen-
cing. Check for any current board
alarms. If so, rectify the problem
in all cases (whether or not the
card presented an alarm) carry
out again a complete download.
Message Definition Corrective actions
Error when transfering
the sRam File NFS server problem (directory not
recognized by the server) Export the directory in R/W to the
NFS server.
Message Definition Corrective actions
Error when setting the
radiolink characteristics The modification of the radio link
characteristics displayed cannot be
taken into account.
Before modifying the bandwidth,
suppress the NTs linked to this
radio link (see 4.6.3)
Message Definition Corrective actions
Bad static Value down-
stream Inconsistency between the services
already created and the modified
static zone in the downstream
- Cancel the modification
- Update the static zone with a
value compatible with the static
services already created
Bad static Value ups-
tream Inconsistency between the services
already created and the modified
static zone in the upstream (x from
1 to 4)
- Cancel the modification
- Update the static zone with a
value compatible with the static
services already created
Bad dynamic max Value
downstream Inconsistency between the services
already created and the modified
dynamic zone in the downstream.
Update the dynamic zone with a
value compatible with the
dynamic service already created
and the overbooking factor limit
3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 291/302
292
A.6.8 – ASAP error messages
A.6.9 – Miscellaneous error messages
Bad dynamic Value ups-
tream x Inconsistency between the services
already created and the modified
dynamic zone in the upstream.
Update the dynamic zone with a
value compatible with the
dynamic service already created
and the overbooking factor limit
Bad dynamic max Value
upstream x (x from 1 to 4) Update over booking factor limit
with a value compatible with the
dynamic services created and
the dynamic zone.
Message Definition Corrective actions
Error removing ASAP The ASAP cannot be removed
because at least one NT is attached
to the ASAP table.
Before removing, the ASAP table
has to be deleted for each NT
attached to the table.
Message Definition Corrective actions
Error when destroying
the board Board deletion control denied. The corrective action is related to
the type of board:
.AMD board: make sure that no
NT is associated with the board.
.TNT board: make sure that no
port is used either by a leased
line or as a potential source of
synchronization.
.NT board: make sure that no
port is used either by a leased
line or by an IP cross-connection.
Error when modifying the
TNT board The modification of the TNT board
characteristics cannot be taken into
account.
All circuit emulation services
must be suppressed before
modifying the configuration of a
TNT board.
Error when updating the
BS In BS’s local network screen one
parameter is not correct. - Check that BS’s IP address is a
real IP address.
- Check that Ethernet and ATM
networks are different.
Error when setting syn-
chro parameters Synchronization configuration is not
allowed. Check that the reserved chan-
nels are configured (see § 4.11).
Error when enabling/
disabling E1 traffic on a
TNT port
Enabling/disabling is not allowed. If the TNT port is used for system
synchronization, the TNT port
cannot be locked.
Message Definition Corrective actions
292/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
292
PAGE INTENTIONALLY LEFT BLANK
3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 293/302
298
Appendix 7 – Pole mounting 9900UXI101
A.7.1 – Definition
Figure 61 – Definition of 7390BS outdoor equipment
Figure 62 – Dimensions of the RBS on pole mounting (99UXI101)
Sectored
antenna
Transceiver
Tube ou pole
RBS/DBS connection cable
Mechanical pole
mounting
(9900UXI101)
RBS
288.2 238
689.3
503.4
294/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
298
A.7.2 – Installation of the RBS mechanical support on a wall or flat
surface
Considerations:
–If attaching the support using wall plug and bolt, select the fixing elements with respect to the
mounting surface.
–The surface chosen should not be subject to vibrations (e.g., avoid mounting on machine hou-
sing).
Figure 63 – Direct wall mounting
Figure 64 – Wall mounting option with mounting plate 9900UXI101
130
160
130
160
300
100 150
300
25
20
150
R6
Thickness 5 mm.
3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 295/302
298
Stages
1. Select the installation location.
2. Drill 4 holes according to the dimensions given in Figure 63 – Direct wall mounting.
3. Insert 4 wall plugs.
4. Install and secure the wall support using 4 x M10 screws with washers.
A.7.3 – Installation and orientation of the mechanical system
(9900UXI101)
Considerations
–Installation can be carried out on an existing or newly installed tube or pole.
–The external diameter of the tube or pole is maximum 114 mm in standard configuration.
Note: Other tube diameters may be used depending on the loads to be supported: minimum diameter
76 mm and maximum 114 mm.
–The tube or pole along with the U-bolts must be clean and (apart from threads) grease-free.
–Wall mounting possible with or without wall plate: see Figure 63 – Direct wall mounting and Figure
64 – Wall mounting option with mounting plate 9900UXI101.
Stages (Figure 65 – Installation and orientation of the mechanical system 9900UXI101)
1. On the pole mounting (ref. 1), loosen the four "bearing" locking screws (ref. 6) and the coarse
"bearing" locking screw (ref. 7) to facilitate the subsequent RBS unit mounting.
2. Fit the pole mounting (ref. 1) on the tube or pole (ref. 2) using the U-bolts (ref. 3). Secure it using flat
washers, "grower" washers, nuts and lock-nuts (ref. 4).
3. Roughly orientate the bearing of the pole mounting in the desired topographical direction. The
bearing turnbuckle (ref. 8) should remain in mid-position. Use the "top" marking of the antenna and
a compass, then tighten the U-bolts (ref. 3). U-bolt tightening torque = 3daN.m.
4. Roughly orientate the elevation of the antenna support by loosening the "elevation" locking screw
(ref. 9). The elevation turnbuckle (ref. 5) should remain in mid-position; pivot the antenna support
through the vertical to adjust, then tighten the "elevation" locking screw (ref. 9).
IMPORTANT: THIS MUST NOT DEPART FROM ± 1° TO THE VERTICAL FOR
THE PURPOSE OF POLARISATION
USE BOLT SIZE M10 (MINIMUM 10 mm DIAMETER). CHECK RELEVANT LOCAL
REGULATIONS BEFORE INSTALLING.
VERTICALITY OF THE BEARING: ± 0.5 ° FOR STANDARD ANTENNAS.
± 0,25 ° FOR LARGE GAIN ANTENNAS.
NEVER INSTALL THE BEARING AXIS HORIZONTALLY; THE RBS UNITS MUST
BE ABOVE THE POLE MOUNTING AND NOT PROJECT LATERALLY.
296/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
298
Figure 65 – Installation and orientation of the mechanical system 9900UXI101
A.7.4 – Antenna alignment
A.7.4.1 – Mechanical adjustments and deflection characteristics
The mechanical adjustment mechanisms are shown in Figure 66 – Antenna alignment adjustment
mechanisms :
Figure 66 – Antenna alignment adjustment mechanisms
Deflection characteristics:
–The total deflection is: bearing = 270°, elevation = ± 25°; these values are obtained with the tur-
nbuckles set to "maximum".
–The deflection obtained with the turnbuckles is: elevation = ± 9° bearing = ± 9°.
A.7.4.2 – Alignment adjustment procedure
2
4
7
3
8
9
6
5
1
Coarse elevation (tilt) locking screw
Coarse bearing
locking screw
Bearing locking
screw
Bearing turn-
buckle
Ground connection hole
Elevation (tilt) turn-
buckle Elevation (tilt)
locking screw
3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 297/302
298
Stages
1. Using a control system (graduated level or inclinometer) positioned on the straight part of the
antenna (Figure 67 – Checking antenna positioning), ensure that it is perfectly horizontal (tilt 0°).
2. Make a bearing alignment in the direction intended by the radio planners (compass, "TopoChaix",
etc.).
3. To avoid obstacles during installation, the "bearing" turnbuckle may be mechanically reversed on the
pole-mounting. However, the bearing axis must remain vertical.
4. Tighten the "coarse" bearing locking screw. Turn the bearing turn-buckle. Tighten the four bearing
front screws (alternate diagonal tightening) torque of 1.5m daN.
5. Check that the rough elevation screw is locked to a torque of 1.5m daN.
6. Using the "fine" elevation adjustment on the pole mounting (site elevation turnbuckle), set the tilt
angle intended by the radio planners (e.g., tilt down 5°). Check this value with the control system
(graduated level, inclinometer, "TopoChaix", etc.) positioned on the straight horizontal part of the
antenna or the pole mounting.
Note: to minimize the unscrewing of the elevation turnbuckle, make careful use of the "coarse" adjust-
ment in the first stage. The turnbuckle must remain in the mid-position (*"85mm center dis-
tance). Never exceed a center distance of 94 mm.
7. Secure the two "elevation" side locking screws. Tighten completely the screws to lock the assembly
in position, to a torque of 3 mdaN. Finish the operation by tightening the turnbuckle counter-screws
to a reference torque of 2 mdaN. This ends the antenna alignment.
8. Check the bearing and elevation of the antenna once the assembly has been firmly secured. If a shift
is noted, repeat the adjustement(s) in question.
Figure 67 – Checking antenna positioning
298/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
298
A.7.5 – Grounding of the outdoor equipment
Grounding of the outdoor equipment consists of:
–connecting the grounding of the RBS Unit with the pole-mounting grounding,
–connecting the coupled RBS unit and pole-mounting grounding to the earthing system.
Considerations
–For grounding the RBS unit, a green/yellow cable with insulating sheath must be used. The mini-
mum cross-section of the conducting wire is 16 mm2 .
–On the pole-mounting assembly, the ground terminal comprises two tapped holes at the rear of
the metal cast supporting the RBS (see Figure 68 – Grounding the outdoor equipment on
9900UXI101 pole mounting). According to the installation, choose the most suitably positioned
tapped hole. The grounding screw screws on in one of the two nuts inserted into the metal cast.
When changing the grounding position block the nut to avoid loosing it.
Stages
1. Crimp a terminal lug (ref. 16-6 CT) at each end of the cable linking the RBS unit ground and pole-
mounting ground connections.
2. Screw one of the grounding cable lugs into the tapped hole on the front of the RBS unit (see Figure
68 – Grounding the outdoor equipment on 9900UXI101 pole mounting). Use an M6 screw.
3. Crimp a lug (ref. 16-6 CT) on to the grounding cable of the pole-mounting and RBS assembly.
4. Connect both grounding cables to the one of the holes on the support back panel.
Figure 68 – Grounding the outdoor equipment on 9900UXI101 pole mounting
Screw for grounding RBS unit
Screw for grounding
Grounding cable between RBS
and pole-mounting
pole-mounting
Grounding cable of the RBS and
pole-mounting assembly
3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 299/302
300
Appendix 8 – Using the DALLET system by SOFRER
for 1 m & 1.5 m high mast on rooftop
Recommendations according to Snow and Wind Rules NV 65 are only indications and
should be verified according to the sites.
Feet weight : about 50 Kg for each DALLET.
7 DALLET
BEFORE ANY USE, VERIFY THE RULES APPLICABLE LOCALLY AND
COMPUTE ACCORDING TO THE REGULATIONS.
Zones 1, 2 and 3
300/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
300
PAGE INTENTIONALLY LEFT BLANK
3CC12424AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 301/302
302
Appendix 9 – List of abbreviations
MNEMONIC ENGLISH MNEMONIC ENGLISH
AAL ATM Adaptation Layer FEC Forward Error Correction
AIS Alarm Indication Signal HDB3 High Density Binary 3 code
(3rd order)
AL Alarm IBS Intermediate frequency Base Station
AMD ATM Modulator Demodulator ICS Identifier Change Status
ANT ATM Network Termination I2C or IIC Inter Integrated Circuit
ASAP Alarm Severity Assignment Profile ID IDentifier
ATM Asynchronous Transfer Mode IEC International Electrotechnical
Commission
AT Attend alarm on LT IM Information Model
AVC Attribute Value Change IP Internet Protocol
BER Bit Error Rate ISDN Integrated Services Digital Network
BNC Bayonet-locking Connector ITU International Telecommunication
Union
BS Base Station LAIS Line Alarm Indication Signal
CBR Constant Bite Rate LAN Local Area Network
CCIR International radio consultative
comitee LED Light Emitting Diode
CEPT Conference of European Post and
Telecommunications administrations LMDS Local Multipoint Distribution Service
CPL Coupler LMFA Loss of MultiFrame Alignment
CRC Cyclic Redundancy Check LOF Loss Of Frame
DBS Digital Base Station LOP Loss Of Pointer
EMC ElectroMagnetic Compatibility LOPC Loss Of Polling Cell
EPROM Electronically Programmable
Read-Only Memory LORF Loss Of Radio Frame
ETSI European Telecommunications
Standards Institute LOS Loss Of Signal
ETH Ethernet LRDI Line Remote Defect Indicator
FAS Frame Alignment Signal LT Local Terminal
302/302 Issue 01 - April 2001 - Draft 04 3CC12424AAAA TQ BJA 01
302
END OF DOCUMENT
MNEMONIC ENGLISH MNEMONIC ENGLISH
MAC Medium Access Control RBS Radio of Base Station
Mbps Mega Bit Per Second RDI Remote Defect Indication
MIB Management Information Base REI Remote Error Indication
MMI Man Machine Interface RF Radio Frequency
MSC Message Sequence Chart RIT Radio Installation Tool
MUX Multiplexer RRM Radio Resource Management
NE Network Element RT Radio Terminal
NFS Network File System SC State Change
NIT Network Installation Tool SDH Synchonous Digital Hierarchy
NRZ Non return to zero SMD Surface Mounted Device
NSM Network Service Management SNMP Simple Network Management
Protocol
NT Network Terminal SNTP Simple Network Time Protocol
OC Object Creation STP Shielded Twisted Pair
OD Object Deletion TAC Technical Assistance Center
OOF Out Of Frame TCP Transmission Control Protocol
OS Operation System TDM Time Division Multiplex
PAIS Path Alarm Indication Signal TE Transaction End
PC Personal Computer TNT TDM Network Termination
PCR Peak Cell Rate TS Terminal Station
PDH Plesiochronous Digital Hierarchy UNI User Network Interface
PLL Phase Locked Loop VPI Virtual Path Identifier
PSU Power Supply Unit VCI Virtual Channel Identifier
PVC Permanent Virtual Circuit WAN Wide Area Network
QAM Quadrature amplitude Modulation VoIP Voice over IP
RAI Remote Alarm Indicator

Navigation menu