ZIV SWT User Manual

Making the Smart Grid Real

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ZIV
Antonio Machado,78-80
08840 Viladecans, Barcelona-Spain

Tel.: [phone]
Fax: [phone]
Mail to: [e-mail]

www.zivautomation.com

GIGABIT/FAST ETHERNET SWITCH

TYPE SWT

USER GUIDE

V09 - March 2019

M0SWTA1903Iv09

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

SAFETY SYMBOLS



WARNING OR CAUTION:
This symbol denotes a hazard. Not following the indicated procedure,
operation or alike could mean total or partial breakdown of the
equipment or even injury to the personnel handling it.

NOTE:
Information or important aspects to take into account in a procedure,
operation or alike.

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CONTENTS

Page

1 INTRODUCTION 6

1.1 GENERAL 6

1.2 MAIN CHARACTERISTICS 6

1.3 EQUIPMENT COMPOSITION 10

1.4 TECHNICAL SPECIFICATIONS 11

1.4.1 Switch characteristics 11

1.4.2 Unit interfaces 11

1.4.3 Accessories 12

1.4.4 Equipment management 13

1.4.5 Additional services 13

1.4.6 Certifications 13

1.4.7 Mechanical characteristics 14

1.4.8 Operating conditions 14

1.5 WARNINGS 16

1.5.1 Warnings before installing 16

1.5.2 Equipment safety considerations 17

2 MECHANICAL AND ELECTRICAL CHARACTERISTICS 18

2.1 10/100BASE-TX (RJ-45) PORTS 22

2.2 100BASE-FX (MULTIMODE, MT-RJ) PORTS 24

2.3 100BASE-FX (MULTIMODE, ST or SC) PORTS 24

2.4 100BASE-FX (MULTIMODE, LC) PORTS 25

2.5 100BASE-LX (SINGLEMODE, LC) PORTS 25

2.6 SFP PORTS 26

2.7 SRV PORT 28

2.8 I/O CONNECTOR 29

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Page

3 LED SIGNALLING 30

3.1 SWT WITH FRONT PORTS 30

3.2 SWT WITH REAR PORTS 34

4 ACCESS TO THE EQUIPMENT 37

4.1 CONSOLE 37

4.2 HTTP SERVER 38

5 CONFIGURATION AND MANAGEMENT 40

5.1 GENERAL PARAMETERS 41

5.1.1 Equipment identification 42

5.1.2 Access control 42

5.1.3 Others 43

5.1.4 Syslog 43

5.2 ADMINISTRATION 44

5.3 LAN CONFIGURATION 45

5.4 ETHERNET PORTS CONFIGURATION 46

5.5 VLAN CONFIGURATION 50

5.6 BANDWIDTH LIMIT CONFIGURATION 54

5.7 QoS CONFIGURATION 55

5.8 PORTS MONITORING CONFIGURATION 58

5.9 LLDP CONFIGURATION 61

5.10 SNMP CONFIGURATION 63

5.11 STP PROTOCOL CONFIGURATION 66

5.12 NTP/SNTP CONFIGURATION 70

5.13 MULTICAST CONFIGURATION 72

5.13.1 Static 74

5.13.2 GMRP 75

5.13.3 IGMP 77

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Page

5.14 ACCESS CONFIGURATION 79

5.15 SECURITY CONFIGURATION 81

5.15.1 802.1x 82

5.15.2 MAC list 84

5.16 OTHERS CONFIGURATION 85

5.17 REBOOT 86

5.18 CODE REFLASH 86

5.19 CONFIGURATION FILE 87

5.19.1 Upload (from the PC to the equipment) 88

5.19.2 Download (from the equipment to the PC) 88

5.20 EVENT FILES 89

6 STATISTICS 90

APPENDIX A

BIBLIOGRAPHY AND ABBREVIATIONS 96

APPENDIX B

DATA STRUCTURE IN CLI 101

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1 INTRODUCTION

1.1 GENERAL

SWT is a Gigabit/Fast Ethernet switch intended for big scale LAN deployments where:

port density,
switching performance, and
logical complexity

are the main challenges to surpass.

SWT devices bring the necessary capabilities to implement the automation of electrical
substations according to the IEC 61850 standard.

The SWT can be managed locally and remotely, through a console or through a built-in
web server, HTTP or HTTPS, SSH connection and Telnet.

The SWT also supports the SNMPv1, SNMPv2c and SNMPv3 protocols, as well as other
protocols and services such as LLDP, GARP/GMRP, IGMP, NTP/SNTP, TACACS+ and RADIUS.

1.2 MAIN CHARACTERISTICS

Some of the SWT most important features are described below.

❖ Grouping of services and architectures.

Services may be grouped and discriminated, some not being accessible with others,
through the configuration of different VLANs.
Each VLAN is different from the others thanks to a specific identifier, called VID, which is
included in the VLAN tag and specified in the standard IEEE 802.1q. It permits several
VLANs to share resources, either switching equipment such as the SWT, or links
between switching equipment, guaranteeing that each VLAN traffic will remain isolated
from the others.
The standard 802.1q admits three types of frames: untagged frames, tagged frames with
the VLAN ID (VID) identifier and the priority (tagged) or only the priority (priority tagged,
VLAN = 0).
The SWT may adapt to different network architectures, such as: star, double star, ring,
double ring, and linked rings.

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FIGURE 1 Traffic separation

FIGURE 2 Star topology

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FIGURE 3 Rings

❖ Link Aggregation by LAG function.

The Link Aggregation Group (LAG) function allows grouping several links into a single
aggregated link identifier. Figure 3 illustrates an example of link aggregation. From the
point of view of the STP/RSTP protocol, the connection entity is the LAG group identifier.
In this way, the different links that are part of the LAG are not handled individually and are
not considered a loop, and thus it provides the aggregated bandwidth.

Link aggregation can be created for any of the planned interface functions: user (edge,
untag), inter-switch link (trunk or native) and those associated to the Q-in-Q functionality
(access and core). Once the LAG is established, the set of parameters of the interface
selected as Leader determines the behaviour of the group.

❖ Q-in-Q operation.

The SWT includes two functions that provide Q-in-Q operation (double-tagged). In this
operation mode, the frames include the original tag (C-TAG), either generated by the
client equipment or assigned by the switch itself at the moment is received, and a second
tag, the tag of the provider (S-TAG), which will be the tag used in the network of the
service provider.

The 802.1Q tunnels are a useful tool to reuse the identification VID values of the VLAN,
or for transiting data over third-party networks.

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FIGURE 4 Q-in-Q operation

❖ Advanced RSTP implementation

The SWT not only complies with the STP and RSTP protocols for resolving loops in the
network and operation in rings, but it also exceeds the recovery times obtained through
said protocols. Thus, the SWT guarantees recovery times lower than 4 ms per link via the
RSTP standard in case of failure.

❖ Critical services and security.

The different services have their level of importance. For example, sending orders to
open a switch has priority over the traffic from a telephone connection. The SWT has
Quality of Service (QoS), which identifies critical services, guaranteeing that all traffic
receives the appropriate priority.
On the other hand, the SWT implements different security features that prevent
unauthorized access to the traffic system, such as: port disabling, traffic restriction
according to MAC addresses, authentication protocols (TACACS+, RADIUS), etc.

❖ Broadcast traffic limitation.

In order to avoid the network flooding, the SWT establishes maximum volume limits for
different combinations of broadcast, multicast, and flooding messages, in each one of
their ports.

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❖ Multicast traffic.

The SWT has two protocols for adapting the multicast traffic to the desired interfaces.
The protocols are:

o GARP/GMRP (IEEE 802.1D 2004). The GMRP clients request to the SWT the

selective transmission of the multicast traffic desired by each of them.

o IGMP. The SWT manages multicast traffic based on the IGMP messages

exchanged by the client equipment and the multicast routers (IGMP Snooping).
To be operative, the GARP/GMRP protocol must be INACTIVE.

The SWT also establishes the multicast flows in an explicit and manual way.

❖ Port mirroring.

The SWT resends traffic copies of one or more ports to another one, the monitoring port,
being able to establish incoming or outgoing traffic copies in each monitored port in an
independent manner.

1.3 EQUIPMENT COMPOSITION

The SWT is provided in a 19" shelf that is 1 standard unit (s.u.) in height, prepared for rack
mounting.

It includes a serial maintenance interface (DCE mode) and an I/O connector (see section

2.8), and can include 4 Gigabit Ethernet SFP bays and up to 32 ports, front or rear.

The SWT has a 4-block mechanical structure for the installation of the ports. See in section

1.4.2, Equipment interfaces, the types of blocks available and their requirements.

The main power supply may be isolated DC or multirange (VDC and VAC). The SWT may
include an isolated DC or multirange (VDC and VAC) redundant power-supply option and, in
the front port model, a PoE power-supply option for the direct connection of IP devices
(IEEE 802.3 af) in the first four electrical ports (1 to 4).

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1.4 TECHNICAL SPECIFICATIONS

1.4.1 Switch characteristics

➢ Full Duplex Wired Speed switching core.

➢ Port speed automatic detection.

➢ STP and RSTP for resolving loops in the network and operation in rings.

➢ Multiple VLANs management (250 simultaneously).

➢ QoS:

•

the SWT can use the priority fields included in the IEEE 802.1p tag,

•

as well as the DSCP identifier included in the IP header.

➢ Broadcast and Multicast (Broadcast Storm Control) traffic limitation.

➢ MAC access control lists and 802.1x user authentication.

➢ Q-in-Q operation (double-tagged).

➢ Link aggregation by LAG function, static, according to IEEE 802.1ad.

➢ Port mirroring.

➢ Links in VLAN Native mode.

➢ Interoperability with IEDs (Intelligent Electronic Device) that complies with the

IEC 61850 requirements.

1.4.2 Unit interfaces

➢ Up to 32 ports, front or rear.

The chassis has a mechanical structure

of up to four blocks

for the installation of the

ports. The type of blocks to be combined are the following:

•

Block of 8 ports type

10/100Base-Tx

with

RJ-45

connector.

•

Block of 8 ports type

10/100Base-Tx

with

RJ-45

connector and

PoE

in the first four

ports (always front). One block of this type as maximum.

•

Block of 4 or 8 ports type

100Base-Fx multimode

(1300 nm) with

MT-RJ

connector.

•

Block of 2 or 4 ports type

100Base-Fx multimode

(1300 nm) with ST connector.

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•

Block of 4 or 8 ports type

100Base-Fx multimode

(1300 nm) with LC connector.

•

Block of 4 or 8 ports type

100Base-Lx singlemode

(1300 nm) with

LC SM

connector.

•

Block of 2 or 4 ports type

100Base-Fx multimode

(1300 nm) with SC connector.

The blocks must be installed consecutively, from left to right, without leaving empty
slots.
If there are electrical ports, they must always be in the first position.

If only fiber optic ports are used, a maximum of 24 ports are supported.
No port blocks with 4 connectors MT-RJ, 2 connectors ST, 2 connectors SC or
4 connectors LC (LC SM) should be installed in the first position.

➢ 1 service console (DCE mode).
➢ 4 Gigabit Ethernet SFP bays (see section 1.4.3, Accessories), front or rear.
➢ 1 I/O connector with one digital input and output that can be managed via SNMP.

The digital output can be configured as an alarm.

1.4.3 Accessories

➢ Gigabit/Fast Ethernet SFP modules.

The following list corresponds to verified modules, which comply with the temperature criteria.

•

SFP 1000BaseT (4CZ07980001)
type of connector: RJ-45

•

SFP 1000BaseSx (4CZ07980002)
type of connector: LC
type of fiber: multimode
wavelength: 850 nm
typical maximum distance: 550 m

•

SFP 1000BaseZx (4CZ07980004)
type of connector: LC
type of fiber: singlemode
wavelength: 1530 nm
typical maximum distance: 80 km

•

SFP 1000BaseLx (4CZ07980005)
type of connector: LC
type of fiber: singlemode
wavelength: 1310 nm
typical maximum distance: 10 km

•

SFP 100BaseEx (4CZ07980008)
type of connector: LC
type of fiber: singlemode
wavelength: 1310 nm
typical maximum distance: 40 km

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•

SFP 100BaseFx (4CZ07980006)
type of connector: LC
type of fiber: singlemode
wavelength: 1310 nm
typical maximum distance: 10 km

•

SFP 100BaseFx (4CZ07980007)

type of connector: LC
type of fiber: multimode
wavelength: 1310 nm
typical maximum distance: 2 km

➢ Optical fiber pigtails.

•

Flat RJ45 STP CAT6 cable, 3m length (4GL03000141).

•

Multimode fiber MTRJ-MTRJ, 2m length (4CZ05000010).

•

Multimode fiber MTRJ-SC, 2m length (4CZ05000011).

•

Multimode fiber MTRJ-ST, 2m length (4CZ05000012).

•

Multimode fiber MTRJ-LC, 2m length (4CZ05000013).

•

Multimode fiber LC-LC, 2m length (4CZ05000014).

•

Singlemode fiber LC-LC, 2m length (4CZ05000015).

1.4.4 Equipment management

➢

Local and remote access through a built-in web server, HTTP or HTTPS, SSH
connection and Telnet.

1.4.5 Additional services

➢ SNMP agent (SNMPv1, SNMPv2c y SNMPv3).

➢ NTP server, and NTP/SNTP client.

➢ TACACS+ client.

➢ RADIUS client.

➢ GARP/GMRP (IEEE 802.1D 2004).

➢ IGMP snooping.
➢ LLDP (IEEE 802.1AB 2016).

1.4.6 Certifications

➢ CE.

➢ Designed for industrial applications.

➢ Designed for Electrical Substations.

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1.4.7 Mechanical characteristics

➢ Mechanical enclosure: shelf that is 19" wide and 1 standard unit (s.u.) high.

➢ Dimensions: Height: 44 mm; Width: 445 mm ; Depth: 283 mm.

See FIGURE 5.

➢ Weight: 3.4 kg

➢ IP protection level: IP 2xB

➢ Material: Grey (RAL 7024) zinc-plating iron.

For more mechanical details, see chapter 2, Mechanical and electrical characteristics.

1.4.8 Operating conditions

➢ Power supply: 36-72 Vdc or multirange (80-360 Vdc, 80-260 Vac).

Redundant power-supply option and, in front port model, PoE
power-supply option in the first four electrical ports (1 to 4).

DC operation is protected by diode against polarity inversion.
Multirange model is also protected against polarity inversion.

➢ Consumption: Maximum consumption at 48 Vdc: 40 W.

Maximum PoE consumption to be distributed between electrical
ports P1 to P4: 12 W.

➢ Temperature range: from -25ºC to +70ºC

➢ Relative humidity: not greater than 95%, in accordance with IEC 721-3-3 class 3K5

(climatogram 3K5).

➢ Electrical safety: in accordance with EN 60950 standard.

➢ R.F. emissions: in accordance with EN 55022 standard.

➢ Dielectric strength: in accordance with EN 60255-5 standard.

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➢ Electromagnetic compatibility.

•

Electrostatic discharge immunity test:

in accordance with EN 61000-4-2 standard.

•

Radiated, radio-frequency, electromagnetic field immunity test:

in accordance with EN 61000-4-3 standard.

•

Electrical fast transient/burst immunity test:

in accordance with EN 61000-4-4 standard.

•

Surge immunity test:

in accordance with EN 61000-4-5 standard.

•

Immunity to conducted disturbances, induced by radio-frequency fields:

in accordance with EN 61000-4-6 standard.

•

Power frequency magnetic field immunity test:

in accordance with EN 61000-4-8 standard.

•

Damped oscillatory magnetic field immunity test:

in accordance with EN 61000-4-10 standard.

•

Harmonics and interharmonics including mains signalling at a.c. power port, low

frequency immunity tests:
in accordance with EN 61000-4-13 standard.

•

Damped oscillatory wave immunity test:

in accordance with EN 61000-4-18 standard.

•

Voltage dips, short interruptions and voltage variations immunity tests:

in accordance with EN 61000-4-11 standard.

•

Voltage dips, short interruptions and voltage variations on d.c. input power port

immunity tests:
in accordance with EN 61000-4-29 standard.

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1.5 WARNINGS

1.5.1 Warnings before installing

1. The installation of the SWT in Electrical Substations or Secondary
Substations is generically subject to the fulfilment of all the safety measures
and prevention of risks established for this type of work by the electricity
company that will use these devices and the Safety standards (EN 50110).

2. In order to install and handle the SWT the following points must be
complied with:

- Only qualified personnel appointed by the electricity company that owns
the installation should carry out the installation and handling of the SWT.

- The environment in which it is to operate should be suitable for the SWT,
fulfilling all the conditions indicated in section 1.4.8.

3. ZIV will not accept responsibility for any injury to persons, installations or third
parties, caused by the non-fulfilment of points 1 and 2.





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1.5.2 Equipment safety considerations

1. There are two power-supply models:

- 48 Vdc, isolated

- Multirange Vdc/Vac.
When using the multirange power supply the earth connection must be made
before connecting any other power-supply cable.
In the isolated 48 Vdc model this connection is not compulsory but it is
strongly advisable.

2. ZIV will not accept responsibility for any injury to persons or third parties,
caused by the non-fulfilment of point 1.

1. The terminal contains components sensitive to static electricity, the following
must be observed when handling it:

- Personnel appointed to carry out the installation and maintenance of the
switch SWT must be free of static electricity. An anti-static wristband and/or
heel connected to earth should be worn.

- The room housing the SWT must be free of elements that can generate
static electricity. If the floor of the room is covered with a carpet, make sure
that it is anti-static.

2. ZIV will not accept responsibility for any damage to the equipment caused by
the non-fulfilment of point 1.







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2 MECHANICAL AND ELECTRICAL CHARACTERISTICS

The diverse elements comprising the Gigabit/Fast Ethernet switch type SWT are supplied
in a shelf that is 19" wide and 1 standard unit (s.u.) high, which is prepared for rack
mounting.

FIGURE 5 shows the general dimensions in mm of the SWT, as well as the position of the
fastening holes.

FIGURE 5 General dimensions in mm of the SWT

The SWT is powered with a nominal voltage of 48 VDC (isolated) or allows DC and AC
supply-voltage operation (80-360 Vdc, 80-260 Vac), through the connector shown in
FIGURE 6.

The female connector supplied with the equipment is suitable for rigid or flexible conductors
of up to 2.5 mm2.

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FIGURE 6 Location of the main power-supply connector (PS 1) and secondary power-supply

connector (PS 2)

a) Rear view of shelf with front ports

b) Rear view of shelf with rear ports

In the SWT front port model, the first four 10/100Base-Tx ports, identified as ports 1 to 4,
admit the PoE power-supply option, which is performed through the connector shown in
FIGURE 7. The PoE interfaces provide power supply to the client equipment using their
own Ethernet cable, for example, IP telephones (IEEE 802.3 af).

The SWT may include two power-supply sources: main (PS 1) and alternative (PS 2)
and, in front port model, the PoE power supply (PoE PS).

FIGURE 7 Location of the PoE power-supply connector (PoE PS) in shelf with front ports

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An earth connection is available (see FIGURE 8). When using the multirange
model, this connection must be made before connecting any other power-supply
cable.

In the isolated 48 Vdc model this connection is not compulsory but it is strongly
advisable.

FIGURE 8 Location of the earth connection

The SWT may have 4 Gigabit Ethernet SFP bays and up to 32 ports, front or rear.

The SWT has a 4-block mechanical structure for the installation of the ports. See in section

1.4.2, Equipment interfaces, the types of blocks available and their requirements.

FIGURE 9 shows an example of a front view of the SWT with 4 Gigabit Ethernet SFP bays
and with 26 Fast Ethernet front ports, the first 16 in 10/100Base-Tx (RJ-45) configuration,
the following 8 in 100Base-Fx (multimode, MT-RJ) configuration and the last 2 in 100Base­Fx (multimode, ST) configuration.

FIGURE 10 shows an example of a rear view of the SWT with 4 Gigabit Ethernet SFP bays
and with 24 Fast Ethernet rear ports, the first 16 in 100Base-Fx (multimode, MT-RJ)
configuration and the last 8 in 100Base-Fx (multimode, ST) configuration.

The electrical characteristics of the connectors and their use are indicated in sections 2.1 to

2.8.



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FIGURE 9 Front view of the SWT shelf with 26 Fast Ethernet front ports and 4 SFP bays

FIGURE 10 Rear view of the SWT shelf with 24 Fast Ethernet rear ports and 4 SFP bays

As is shown in FIGURE 11, there is a maintenance connector, identified as SRV, at the
right of the SWT, for accessing the equipment through a console, and an I/O connector.

FIGURE 11 Location of the SRV maintenance connector and the I/O connector

a) Front view of shelf with front ports

b) Rear view of shelf with rear ports

The electrical characteristics of the I/O connector are indicated in section 2.8.

The electrical characteristics of the maintenance connector and its use are indicated in
section 2.7, SRV port. The connector has a protective cap.

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2.1 10/100BASE-TX (RJ-45) PORTS

The cable used to connect a 10/100Base-Tx port should be an unshielded twisted 4 pair
category five cable (UTP-5) with 8-pin RJ-45 connectors. The cable length should not be
more than 100 m.

The UTP-5 cable is made up of eight copper wires that form the four twisted pairs, covered
in different coloured insulating material. FIGURE 12 shows the colour of the wires that
make up each one of the pairs, according to ANSI/TIA/EIA-568-A standard.

FIGURE 12 Unshielded twisted pair category five cable (UTP-5) with RJ-45 connector according to

ANSI/TIA/EIA-568-A standard

FIGURE 13 shows the use of each one of the pins of the RJ-45 connector, as well as the
pair it belongs to according to ANSI/TIA/EIA-568-A standard, in the 10/100Base-Tx LAN
interface.

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FIGURE 13 Signals of the RJ-45 connector in the 10/100Base-Tx LAN interface

Pair 1 is used for the VDCPoE+ connection, and pair 4 is used for the VDCPoE­connection in the ports that admit the PoE power-supply option, electrical ports 1 to 4.

Straight-through cables must be used, see FIGURE 14, where the 4 pairs correspond at
both ends of the cable.

FIGURE 14 Straight-through cable

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2.2 100BASE-FX (MULTIMODE, MT-RJ) PORTS

In each 100Base-Fx port of this type, it should have an MT-RJ type connector. The cable
required to make the connection should be a fiber optic cable made up of two multimode
optical fibers, one to transmit data and the other to receive it. Each of the fibers should be
125 μm in diameter. The core and the cladding of the fiber are included in this diameter, as
can be seen in FIGURE 15. The core can be 50 μm or 62.5 μm in diameter. The
wavelength used should be 1300 nm (multimode). The cable length should not be more
than 2 km.

FIGURE 15 shows the most important input and output optical power characteristics
according to the type of multimode fiber used.

All the MT-RJ type connectors have a protective cap.

FIGURE 15 Multimode optical fiber

2.3 100BASE-FX (MULTIMODE, ST or SC) PORTS

In each 100Base-Fx port of this type, it should have a ST or SC type connector. The cable
required to make the connection should be a fiber optic cable made up of two multimode
optical fibers, one to transmit data and the other to receive it. Each of the fibers should be
125 μm in diameter. The core and the cladding of the fiber are included in this diameter, as
can be seen in FIGURE 15. The core can be 50 μm or 62.5 μm in diameter. The
wavelength used should be 1300 nm (multimode). The cable length should not be more
than 2 km.

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FIGURE 15 shows the most important input and output optical power characteristics
according to the type of multimode fiber used.

All the ST or SC type connectors have a protective cap.

2.4 100BASE-FX (MULTIMODE, LC) PORTS

In each 100Base-Fx port of this type, it should have a LC type connector. The cable
required to make the connection should be a fiber optic cable made up of two multimode
optical fibers, one to transmit data and the other to receive it. Each of the fibers should be
125 μm in diameter. The core and the cladding of the fiber are included in this diameter, as
can be seen in FIGURE 15. The core can be 50 μm or 62.5 μm in diameter. The
wavelength used should be 1300 nm (multimode). The cable length should not be more
than 2 km.

FIGURE 15 shows the most important input and output optical power characteristics
according to the type of multimode fiber used.

All the LC type connectors have a protective cap.

2.5 100BASE-LX (SINGLEMODE, LC) PORTS

In each 100Base-Lx port of this type, it should have a LC singlemode type connector. The
cable required to make the connection should be a fiber optic cable made up of two
singlemode optical fibers, one to transmit data and the other to receive it. Each of the fibers
should be 125 μm in diameter. The core and the cladding of the fiber are included in this
diameter. The core is 9 μm in diameter. The wavelength used should be 1300 nm
(singlemode). The cable length should not be more than 10 km.

The most important input and output optical power characteristics are:

Input optical power

Output optical power

Minimum

Maximum

Minimum

Maximum

-25 dBm

-8 dBm

-15 dBm

-8 dBm

All the LC singlemode type connectors have a protective cap.

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2.6 SFP PORTS

The bays available in the front plate of the equipment admit the installation of SFP (Small
Form Factor Pluggable) modules, which provide optic Gigabit Ethernet interfaces to the
switch; the characteristics of the fiber optic to be used, as well as the type of connector, will
depend on the SFP model used. See the available modules in section 1.4.3, Accessories.

Bays have a protective cap.

FIGURE 16 SFP modules

Inserting procedure of an SFP module

The inserting procedure of an SFP module is the following:

1. Remove the protective packaging of the SFP module.

2. Check that the SFP module is the correct one for your network configuration.

3. Hold the module between your thumb and forefinger.

4. Insert the module into the corresponding SFP slot on the front panel of the equipment.

5. Remove the protective caps from the optical ends of the module.

6. Insert the fibers, in the optical ends of the module, keeping in mind the TX and RX data
transmission directions (see FIGURE 16).

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Removing procedure of an SFP module

The removing procedure of an SFP module is the following:

1. Disconnect the optical fiber from the connector of the SFP module.

2. Pull down the transceiver security lever.

3. Whilst the security lever down, remove the port from the module (if the SFP does not

slide out of the slot easily, make a slight oscillating motion from one side to another,
while firmly pulling the SFP outward).

FIGURE 17 Removing an SFP transceiver

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2.7 SRV PORT

The electrical characteristics of the maintenance connector and its use are indicated below.
The connector has a protective cap.

FIGURE 18 Location of the SRV maintenance connector

Pin

RS-232

2

RD 3 TD

5

GND

SRV CONNECTOR (DCE mode)

Interface type

ITU-T V.24/V.28 (EIA RS-232)

Connector

DB9 female

Data

Asynchronous

Speed

115200 bit/s

Protocol

CLI (system console)

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2.8 I/O CONNECTOR

The I/O connector input and output are galvanically isolated, and can be managed via
SNMP. The pin-out and the main physical characteristics of the connector are indicated
below.

FIGURE 19 Location of the I/O connector

Pin

Use

1

Output -

2

Output +

3

Not connected

4

Input -

5

Input +

INPUT (pin 4 & 5)

OUTPUT (pin 1 & 2)

Input Inactive

In. Voltage < 8 Vdc

(between pins 4 & 5)

Output Active

Impedance <26 Ω

(between pins 1 & 2)

Input Active

In. Voltage > 10 Vdc

(between pins 4 & 5)

Output Inactive

Impedance> 500 MΩ

(between pins 1 & 2)

Max. voltage

250 Vdc

Protected against

overvoltages >270 Vdc

Max. voltage

250 Vdc

Protected against

overvoltages >270 Vdc
No Vac can be applied

Max. DC current draw

12 mA

Max. DC current

150 mA

Polarity

Pin 4 is the reference

for INPUT- and pin 5

for INPUT+

Protected against wrong

polarities

Polarity

Pin 1 connected to

OUTPUT-- and pin 2 to

OUTPUT+

Switching time ON/OFF

1 ms

Switching time

ON/OFF

2 ms

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3 LED SIGNALLING

The SWT has two basic LEDs (SRV and ON) and several specific LEDs associated with
the Fast Ethernet ports and SFP modules.

The location and identification of the LEDs according to the model are indicated in the
following sections.

3.1 SWT WITH FRONT PORTS

FIGURE 20 shows a front view of the SWT with front ports, showing the detail of the
different LEDs. They are described below.

FIGURE 20 LEDs in the SWT with front ports

Basic LEDs

Srv LED

Amber. It flashes when there is emission or reception
activity by the SRV serial service interface.

On LED

Red. It is permanently lit when the equipment is powered
with an external power-supply voltage.