sample product information booklet
DESCRIPTION
Network Loop Switch informationTRANSCRIPT
Net workLoop Switch
In for ma tion Book let
Part Num ber 8860009-00Re vi sion B
070799
©Copy right 1999, Tadiran Mi cro wave Net works. Printed in USA. All rights re served.
©Copy right 1999, Tadiran Mi cro wave Net works. Printed in USA. All rights re served.
NOTES
SAFETY PRECAUTIONS
DO NOT attempt to install equipment if you do not have installation experience.Tadiran Microwave Networks is not liable for personal injury caused by improperinstallation, nor does the equipment warranty cover equipment damaged by im-proper installation.
PERSONAL SAFETY
For your own safety, please observe the following precautions when working withmicrowave equipment.
The standard 48-Vdc supply voltage is not normally considered life-threatening,however, your physical reaction to accidental contact with that voltage could causeinjury.
EQUIPMENT SAFETY
Remove the power-supply input fuse from the front-panel before removing anyother cable, or cover. A replacement fuse must have the same voltage and amper-age rating as the original fuse as specified in this handbook.
After installation, be sure to secure the any cables to a structure to prevent tripping.
Be sure to follow all applicable building, electrical, and fire codes. Consider con-duit installation as a minimum.
SAFETY CONVENTIONS
The following caution and warning symbols are used in this booklet:
CAUTION indicates a hazardous situation that, if not avoided, could result in minoror moderate injury. Caution may also be used to indicate unsafe practices or risks ofproperty damage.
WARNING indicates a potential hazardous situation that, if not avoided, could resultin death or serious injury.
CAUTION
WARNING
Tadiran Microwave Networks released the original issue of this booklet, P/N 8860009-00, December 1998. The table belowshows revision history.
Pages Changed Date
Revision History
Table of ContentsProduct Description 1
Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Main Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Application 5
Installation 6
ESD Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Address and Communications Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
To Connect Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8To Connect Network Management Data (Network Mode only) . . . . . . . 9To Connect RS232 Signals (DCC Mode only) . . . . . . . . . . . . . . . . . . . 10To Connect VF and DCC Signals (Network and DCC Modes) . . . . . . 10To Verify Your Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Specifications 12
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical & Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Tadiran Microwave Networks Table of ContentsNetwork Loop Switch
061799 8860009-00 Page vii
Tadiran Microwave Networks Table of ContentsNetwork Loop Switch
Page viii 061799 8860009-00
Network Loop Switch
1. Product Description
The Network Loop Switch (NLS) lets customers with networks of CM microwave radios
protect the non-telco channels of those radios. Non-telco channels include network
management data, orderwire, and digital clear channels. The NLS can be configured to
operate in one of two modes: network mode or DCC mode. Network mode protects
network management data as well as orderwire and the digital clear channels. DCC mode
protects the orderwire and the digital clear channels.
In network mode, radios within the loop must use an omni-directional (4-port) Network
Management Unit (NMU) module. Network traffic is unidirectional on radios that have
an NMU with the three-port bridge. Depending on a radio’s configuration, master or
slave, the NMU routes network traffic differently from its east and west ports. This
arrangement does not work well for looped networks since each terminal must
dynamically change its configuration to match condition changes of the loop (open or
closed). The omni-directional NMU eliminates the master-slave design for one suitable to
looped network architecture.
The DCC mode works for radio networks that do not use the NMU. This mode protects
one digital clear channel (DCC) and the orderwire while one DCC becomes the loop
control line. The control line is the port that senses path activity as the next paragraph
describes.
The Network Loop Switch operates as a path detection device and switching point. Each
unit has separate ports for the east and west radio terminals. Detection of identical
network activity on both network ports indicates a looped path. When the NLS detects no
activity on one port it closes the loop to create a path around a failed link. When the NLS
does not detect activity on either side it generates its own pulse on the path to check the
path condition.
8860009-00 052199 Page 1
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PIN_PADSTACK PIN_PADSTACK PIN_PADSTACK PIN_PADSTACK PIN_PADSTACK PIN_PADSTACK PIN_PADSTACK PIN_PADSTACK PIN_PADSTACK
+20-60V PWR
+ -
PW
RFUSE- CH1
TX
/RX
AC
TIV
E CH2
NETWORK
RS-485VF2VF1 RS-232
NETWORK LOOP SWITCH
RS-232 VF2
NETWORK
RS-485 VF1 CH2 CH1
Figure 1. Network Loop Switch (P/N 8000492-00) Front Panel
The NLS closes normally-open (NO) relays to connect east to west communications
paths of the orderwire and data channels and bridges the line drivers and receivers on the
network data channel should the data stop.
The Network Loop Switch fits into one rack space (1RU, 1.75 inch) of a telco equipment
rack with front-panel access to all connections. Two connections for each data type are
provided. The voice frequency (VF) orderwire connects on four-pin RJ-11 jacks. The
RS-422 digital clear channel (DCC, 19.2-kbps asynchronous data) also connects on
four-pin RJ-11 jacks. In the DCC mode, DCC number 1 connects to the RS-232
connectors (see Figure 7).
NMS data connects on the RS-485 or RS-232 connectors. RS-485 connects with the
standard RS-485 cable assembly; that is RJ-12 modular jacks and 4- or 6-wire twisted
pair. RS-232 network communication interfaces with DB-9 connectors and a 1-to-1 serial
cable. DC power, ±20 to 60 Vdc, connects through two-pin power plugs.
Network Loop Switch Product Description
Page 2 8860009-00 061799
Item Description
PWRJ7 and J8. Two-pin power connectors. Use one connector for non-protected systems, both forredundancy protected systems. Input power range is 19 to 56 Vdc at 5 watts or more. Polarity is userselectable (W1, W2).
FUSE F1. Main power fuse is a 125V, 0.75 ampere telecommunications type fuse.
PWR LED Green; indicates unit has main power.
ACTIVE LED Yellow; lights when the relays energize and create a path.
TX/RX LED Green; lights when the internal microprocessor is transmitting or receiving data.
RS-232NETWORK
J3 and J6. RS-232 connection of Network Management System (NMS) data. DB-9 female connector.RS232-type straight through connection; one connector for each path.
RS-485NETWORK
J1 and J2. RJ-12 6-position jack for NMS data connection at RS-485 levels.
VF1/2 (A/B)J13 - VF1a and J14 - VF1b. RJ-11 four-position jack for connection of the orderwire.
J15 - VF2a and J16 - VF2b.
CH1/2 (A/B)J9 - CH1a and J12 - CH1b. RJ-11 four-position jack for connection of the 19.2 kbps data channel.
J10 - CH2a and J11 - CH2b.
Table-A. Front-Panel Features
The Network Data Converter has two major sub-assembles: the housing and the main
(Network Loop) card.
1.1. Housing
The Network Loop Switch has all status indicators, power and signal connectors, and the
power fuse on the front panel. Table A lists all front-panel features and connections.
1.2. Main Card
Table B and Figure 2 describes features of the Network Loop card.
Tadiran Microwave Networks Product Description
8860009-00 061799 Page 3
Item Description
W1, W2Input voltage polarity setting. Set shorting plugs over jumper pins as the card silkscreen shows forpositive or negative input voltage (see Figure 2).
S1Sets unique NLS address. Ping messages are based on the network element address. Each NLS in abranch must use a unique address. Set S1 of each NLS to a different decimal value. This valuebecomes the address. ROCKER 1 IS THE LEAST SIGNIFICANT BIT AND ON = 1, OFF = 0
S2
Sets network data channel communications. ON = 1, OFF = 0Decimal value Baud Data Bits Parity Stop Bits
0 19200 8 ODD 1 (default setting)
1 9600 8 NONE 1
2 19200 8 ODD 2
3-127 19200 8 ODD 1
J7, J8DC power inputs. Connect to one or both from an SP unit. Connect both inputs from the main andstandby side of a protected interface for protected power.
F1 Line fuse. Uses a 125V, 0.25 amp. telecommunications-type fuse.
J3, J6 DB9 female connectors for RS232 connection of NMS data.
J1, J2 RJ-12 jacks for RS-485 connection of NMS data.
CR1, CR2, CR3 LED indicators for power, status, and activity.
J13, J14 RJ-11 jacks for connection of VF channel 1.
J15, J16 RJ-11 jacks for connection of VF channel 2.
J9, J11 RJ-11 jacks for connection of digital clear channel 1.
J10, J12 RJ-11 jacks for connection of digital clear channel 2.
Table B. Network Data Loop Switch Card Features
Network Loop Switch Product Description
Page 4 8860009-00 061799
CE
B
Q21
J8
J9
1
J17
C43
6
95
1
J3
J12
J11
CE
B
Q3
J14
A
C
CR2
1
J7
F1
U13
J10
U11
J16
J13
D6
U12
PIN_PADSTACK PIN_PADSTACK PIN_PADSTACK
1
J5 1
11
11
J2
SW
1
T1
1U
2
31
W2
4
1 2
3
Y2
SG
Q4
1
U8
RP
2
RP
1
1U
9
U14
U10
U15
6
95
1
J6
U6
U3
U5
D1
11
11
1J15
U4
CE
B
Q5
412 3
Y1
NO CNC -
+
K1
NO CNC -
+K2
F2
U17
T2
T3
1
15
9
8
NO CNC -
+
K3
J4
BE
CQ1
J1
A
C
CR3
A
C
CR
4
A
C
CR
5
A
C
CR1
31
W1
S2
S1
TP1
D7
4 123
Y3
-IN
GA
TE
OU
T
GA
TE
IN
+IN
1+
OU
T5
+S
EN
SE
TR
IM
-SE
NS
E
-OU
T-I
N
GA
TE
OU
T
GA
TE
IN
+IN
1+
OU
T5
+S
EN
SE
TR
IM
-SE
NS
E
-OU
T-I
N
GA
TE
OU
T
GA
TE
IN
+IN
1+
OU
T5
+S
EN
SE
TR
IM
-SE
NS
E
-OU
T-I
N
GA
TE
OU
T
GA
TE
IN
+IN
1+
OU
T5
+S
EN
SE
TR
IM
-SE
NS
E
-OU
T
NO
NC
C -+
C NC
NO
NO
NO
C
-+
CNC
NO
INP
UT
PO
LA
RIT
YJU
MP
ER
S"-
"IN
PU
T"+
"IN
PU
T
11
22
33
11
22
33
W2
W2
W1
W1
1
59
4 268
+-
-
1
59
4 268
+-
1
59
4 268
+-
1
59
4 268
TA
DIR
AN
MIC
RO
WA
VE
NE
TW
OR
KS
S/N
++
NE
TW
OR
KL
OO
PS
WIT
CH
NO
NC C - C NC
NO
50
00
49
2-0
0R
EV
**
*
* *
*
*
*
*
*
**
*
**
**
*
**
"-"INPUT "+" INPUT
INPUT POLARITY JUMPERS
31W231W1
11 W2
2 32 3
W1 11
2 32 3
W1W2
S112345678
OF
F
& S2
Figure 2. Network Loop Card
Position 1
2. Application
The following illustration shows the NLS in a network. The NLS is required at a single
point in each loop and supports multiple loops of a branch. Each unit must have a unique
NLS address within the same branch.
Each branch can have no more than 250 network elements, and each loop can be no
larger than 100 terminals.
The Network Loop Switch introduces no delay through its voice and data channel and
11 milliseconds delay through the network/control ports.
Tadiran Microwave Networks Application
8860009-00 061799 Page 5
Normally
Open
Normally
Open
Normally
Open
NLS NLS
NLS
Figure 3. NLS Locations In a Network Branch
3. Installation
First decide whether the NLS will operate in Network mode or DCC mode.
In Network mode, the Network Loop Switch protects network data on radios that use the
omni-directional network management unit (NMU) and software. Upgrade also includes
a reworked ACU and a reworked SCU. Figure 5 shows an example network and the
installations involved at its sites.
Note: Hardware rework is not a field procedure. Return boards that need rework to the
depot.
In the DCC mode—that is, the radios do not use the NMU—connect the radio DCC 1
port as Figure 7 shows. The radio must have a service channel unit (SCU). Set the DCC
switch (S1) of the radio SCU as Table C lists. Connect DCC 2 as Figure 9 shows.
Network Loop Switch Installation
Page 6 8860009-00 061799
NMU Software change.
Software and hardware changes.
OMC
NLS
Figure 4. Types of Installations
NA
Nor
mal
mod
e
1Sto
pbi
t
1Par
itybi
t
8-bi
t dat
a
19.2
kbau
d
1 2 3 4 5 6 7 8
x 0 0 1 1 0 0 0
ON = 1, OFF = 0
Table C. Setting for S1 on SCU when using DCC Mode
3.1. ESD Notice
Observe all electrostatic discharge precautions. Do all bench work at static-safe
workbenches. Don a wrist strap and connect its ground clip or plug to a grounded surface
when working on the Network Loop Switch.
3.2. Unpacking
Upon receipt, and before unpacking anything, inspect the container and report any
damage to the delivering carrier. Forward a copy of any damage claim to Tadiran
Microwave Networks, Customer Service (281-263-6501).
Unpack the equipment carefully to avoid damage. Check the packing material to ensure
no parts or accessories remain in the shipping container. Inspect the unit for damage
before discarding the shipping containers or packing material, you must show this to the
carrier when filing a damage claim. As with damage noted before unpacking, send a copy
of the claim to Customer Service.
3.3. Address and Communications Setup
If several NLS units are needed in a network branch, set S1on the Network Loop card
(Table B, page 3 and Figure 2, page 4) so each NLS address is unique. The decimal value
created by the rocker positions create the address. Rocker 1 sets the least significant bit
so, for example, rockers 1, 2, and 3 set to 1 is address 7.
Set the baud rates on the NMS channels using S2. Default settings are rockers 1 to 8 off
(decimal 0––19.2 kbaud, 8 bits, odd parity, and one stop bit). Setting S2 rocker 1 on and
rockers 2 to 8 off, decimal 1, results in 9600 baud, 8 bits, no parity, one stop bit.
3.4. Mounting
Mount the Network Loop Switch in a relay rack no further than 30.48 meters (100 feet)
from its associated radios. The Network (P4) connection uses the RS-485 standard tested
to 30.48 meters (100 feet).
3.5. Cabling
This section first describes how to connect DC power to the Network Loop Switch
(NLS). And since the NLS monitors data from either the RS-485 or the RS-232 radio
port, sections 3.4.2 and 3.4.3 discuss how to connect data.
Tadiran Microwave Networks Installation
8860009-00 061799 Page 7
�������
3.5.1. To Connect Power
Use this procedure and Figure 6 to wire main power to the Network Loop Switch.
1. Check polarity of the site power supply with a voltmeter (±20 to 60 Vdc).
2. Turn off the main or battery power.
3. Measure resistance between rack ground and the main power-supply
terminals to ensure they are not shorted.
4. Set W1/W2 (Figure 2) to the polarity of site power. Factory default is
negative fused.
5. Attach two 22 to 16 AWG conductors from the main power source to the
two-position power plug. At the power plug, insert each conductor to the
plug contact clamps and tighten the recessed screws on top of the connector.
Observe negative and positive voltage leads and input pins. The power
connector is a Phoenix Contact flange plug, GMSTB 2,5/7,62 type (P/N
3024077-02).
6 Insert the power plug into one of the two PWR connectors on the front
panel. Wire both power connectors for redundancy protected systems – one
side to main power, the other to standby power.
7. Finish cabling before applying power.
Network Loop Switch Installation
Page 8 8860009-00 061799
+V
+V
-V
-V
J7
J8
DCPOWER
+
-
OPTIONALCONNECTION
SINGLE POWER SOURCE
+V
+V
-V
-V
J7
J8
DCPOWER
DCPOWER
+
+
-
-
PROTECTED POWER SOURCE
ACTIV
EFUSE .75A++PWR
- -
POW
ER
STA
TUS
Network Loop Switch
TOP VIEW
POWER LEADS
TO FRONT PANEL
SIDE VIEW
TO FRONT PANEL
pwrwire.cdr
Figure 5. Power Connection
3.5.2. To Connect Network Management Data (Network Mode only)
The NLS terminates the cascaded network data connection (RS-485 chain) between it and
the adjoining radio. To make a cable assembly crimp six-position RJ-12 modular
connectors, such as AMP 5-641337-3, on each end of six-conductor telephone cable as
Figure 7 shows. Pin 1 on the modular jacks of the NLS is on the left.
Connect one end of the cable to the RS485 IN port of the interface. Connect the other end
of the cable to the RS-485 Network port on the Network Loop Switch.
Tadiran Microwave Networks Installation
8860009-00 061799 Page 9
654321
654321
654321
654321
654321
654321
654321
654321
654321
654321
654321
654321
654321
654321
X
X
R-R+T+T-
XT-
R-X
R+T+
R-X
R+
T-T+
X
R+R-
T-T+
X
X
RadioAccess Panel
RadioAccess Panel
RadioAccess Panel
RadioAccess Panel
RadioAccess Panel
RadioAccess Panel
RadioAccess Panel
RadioAccess Panel
RadioAccess Panel
West
Non-directional
4-Port
Configuration
Non-directional
4-Port
Configuration
Non-directional
4-Port
Configuration
Non-directional
4-Port
Configuration
Non-directional
4-Port
Configuration
InvertedCable
InvertedCable
RadioAccess Panel
WestWest West
Notes: “ ” denotes optional wire.
The NLS is always configured in the West Non-directional pinout.Pin 1 of the NLS modular connectors is on the left.
Typical RS-485 NMS Connections on RJ-11 Jacks
T+ T+
OUT OUT
R+T+T-
XX
Special
Adapter
Cable
X
T- T-
IN IN
West
R+
X
R-
R- R-
GND GND
GND GNDGND GND
Standard
InvertingCable
T-T+
Special
Adapter
Cable
3 3
X
X
R+
X
T+
5 5
T-
West
West West
X XR-
X
R+ R+
Network Loop Switch
Network Loop Switch
Network Loop Switch
RS232 NETWORKDCC1 DCC1
DCC MODE
R-
West
2 2
SpecialAdapterCable
X
X
R-R+T+T-
XT-
R-X
R+T+
T-X
T+
R-R+
X
R+R-
T-T+
X
X
East
Network Loop Switch
StandardThroughCable
StandardInvertedCable
WestWest West
Network Loop Switch
4-Port NMU
with early
version or
4/8/12DS1
front panel
4-Port NMU
with early
version or
4/8/12DS1
front panel654321
R+R-
T-T+
X
X
654321
R+R-
T-T+
X
X
4-Port NMU
with early
version or
4/8/12DS1
front panel
Radio
without
NMU
Radio
without
NMU
T-
OUT OUT
XT+
4 4
R-R+
3 3
X
IN IN2 21 1
Figure 6. Network Loop Switch Cabling
3.5.3. To Connect RS232 Signals (DCC Mode only)
Wire conductors to the input and output connectors with a DB-9 male connector
(Figure 8) to fit front-panel connector labeled RS-232 Network. Leave unused pins open.
In the DCC mode, connect DCC1 to the RS232 connector as Figure 7 shows and connect
DCC2 to the RJ connector as Figure 9 shows.
3.5.4. To Connect VF and DCC Signals (Network and DCC Modes)
Crimp four-position RJ-11 modular connectors on each end of a four-conductor telephone
cable in straight-through pinning. Connect NLS VF1/2 to radio VF1/2 and NLS CH1/2 to
radio CH1/2 (Figure 9). In the DCC mode, connect DCC1 (the control channel) to the
RS232 Network (DB9) connector as Figure 7 shows and connect DCC2 using this figure.
Network Loop Switch Installation
Page 10 8860009-00 061799
Pin 1 2 3 4 5 6 7 8 9
Signal NCRXD
IN
TXD
OUTNC GND NC NC NC NC
Figure 7. RS232 Network Connection
Pin 1 2 3 4
VF Signal IN TIP IN RING OUT TIP OUT RING
DCC Signal RS423 IN * * RS423 OUT
* Straight connection to the alternate jack
Figure 8. Modular VF and DCC jacks
Pin 1
3.5.5. To Verify Your Installation
Testing the NLS in a network requires two people: one person at a local site and one at a
remote location—for this discussion local site is the location of observation. Do this test,
if possible, during idle or slow traffic periods.
To test an existing looped configuration with live data:
� Pull the SCU at the remote site. On systems using the orderwire function,
pull the SCU from the terminal that does not have the orderwire card. If
DCC and orderwire communication is not affected so the NLS works.
� Pull the ACU card, which includes the NMU daughter card. The Telescan
NMS should only lose communication to the terminal without the ACU so
the NLS works.
The same functions can also be verified by pulling the cables connecting the two
terminals at the remote site to verify NMS, DCC, and orderwire functions.
To test the NLS on an inactive network:
� Pull the Multiplexer at one remote terminal, which effectively breaks all path
communication. In a hot-standby radio pull both A- and B-side multiplexers.
Any NMS, DCC, orderwire and customer payload proceeds through the network so the
NLS works
Tadiran Microwave Networks Installation
8860009-00 061799 Page 11
4. Specifications
4.1. Environmental
Operating temperature 0 to 55 °C (ambient)
Storage temperature -40 to 125°C
Humidity 0 to 95% (non-condensing)
Rain and dust IP55 spec.
Altitude limits 5000 m
4.2. Electrical & Safety
The NLS meets or exceeds
ETS 300 385 (EMC)
IEC 802-2 (ESD)
Network Loop Switch Specifications
Page 12 8860009-00 061799