Black Box VOE241 User manual

VOE241
Digital VoIP Router
Getting Started Guide
Important
This is a Class A device and is intended for use in a light industrial environment. It is not intended nor approved for use in an industrial
or residential environment.
CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S. 24 hours, 7A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]

Compliance
EMC
•FCC Part 15, Class A
•EN55022, Class A
•EN55024
Safety
•IEC/EN 60950-1
•AS/NZS 60950-1
PSTN Regulatory
•TBR 3
•AS/ACIF S031:2001
Radio and TV Interference
This equipment generates and uses radio frequency energy, and if not installed and used properly—that is, in
strict accordance with the manufacturer's instructions—may cause interference to radio and television recep-
tion. This equipment has been tested and found to comply with the limits for a Class A computing device in
accordance with the specifications in Subpart B of Part 15 of FCC rules, which are designed to provide reason-
able protection from such interference in a commercial installation. However, there is no guarantee that inter-
ference will not occur in a particular installation. If the equipment causes interference to radio or television
reception, which can be determined by disconnecting the cables, try to correct the interference by one or more
of the following measures: moving the computing equipment away from the receiver, re-orienting the receiving
antenna, and/or plugging the receiving equipment into a different AC outlet (such that the computing equip-
ment and receiver are on different branches)
ISDN Compliance
The device identified in this document is approved for connection to the public ISDN telecommunication
network over a BRI/So interface.
CE Notice
We certify that the apparatus identified in this document conforms to the requirements of Council Directive
1999/5/EC on the approximation of the laws of the member states relating to Radio and Telecommunication
Terminal Equipment and the mutual recognition of their conformity.
The safety advice in the documentation accompanying this product shall be obeyed. The conformity to the
above directive is indicated by the CE sign on the device.
Trademarks Used In This Manual
All applied-for and registered trademarks are the property of their respective owners.

Normas Oficiales Mexicanas (NOM)
Electrical Safety Statement
Instrucciones De Seguridad
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea
operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de baño, lavabo,
sótano mojado o cerca de una alberca, etc.
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean recomendados por el
fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabri-
cante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las
instrucciones de operación. Todo otro servicio deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso. La colocación del
aparato eléctrico sobre una cama, sofá, alfombra o superficie similar puede bloquea la ventilación, no se
debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de
calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo
de operación, o como se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea elimi-
nada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados
por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos
donde salen del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo
de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u
orificios de ventilación.

18. Servicio por personal calificado deberá ser provisto cuando:
— A: El cable de poder o el contacto ha sido dañado; o
— B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
— C: El aparato ha sido expuesto a la lluvia; o
— D: El aparato parece no operar normalmente o muestra un cambio en su desempeño; o
— E: El aparato ha sido tirado o su cubierta ha sido dañada.

5
Summary Table of Contents
1General information...................................................................................................................................... 15
2Applications overview.................................................................................................................................... 19
3VOE241 installation...................................................................................................................................... 22
4Initial configuration...................................................................................................................................... 29
ASpecifications ................................................................................................................................................ 40
BCabling ......................................................................................................................................................... 45
CPort pin-outs ................................................................................................................................................ 48
DVOE241 factory configuration ..................................................................................................................... 51
EEnd user license agreement ........................................................................................................................... 61

6
Table of Contents
Summary Table of Contents ........................................................................................................................... 5
Table of Contents ........................................................................................................................................... 6
List of Figures ................................................................................................................................................. 9
List of Tables ................................................................................................................................................ 10
About this guide ........................................................................................................................................... 11
Audience............................................................................................................................................................... 11
Structure............................................................................................................................................................... 11
Precautions ........................................................................................................................................................... 12
Safety when working with electricity ...............................................................................................................12
.......................................................................................................................................................................13
General observations .......................................................................................................................................13
Typographical conventions used in this document................................................................................................ 14
General conventions .......................................................................................................................................14
1General information...................................................................................................................................... 15
VOE241 overview .................................................................................................................................................16
VOE241 rear panel .........................................................................................................................................17
VOE241 front panel .......................................................................................................................................18
2Applications overview.................................................................................................................................... 19
Introduction..........................................................................................................................................................20
Application—Multi-service ISDN Internet telephony IAD ...................................................................................20
Application—ISDN home or telecommuter connectivity......................................................................................21
3VOE241 installation...................................................................................................................................... 22
Planning the installation........................................................................................................................................23
Site log ............................................................................................................................................................23
Network information ......................................................................................................................................23
Network Diagram ...........................................................................................................................................23
IP related information .....................................................................................................................................24
Software tools .................................................................................................................................................24
Power source ...................................................................................................................................................24
Location and mounting requirements .............................................................................................................24
Installing the gateway router..................................................................................................................................24
Placing the VOE241 .......................................................................................................................................24
Installing cables ...............................................................................................................................................25
Connecting ISDN terminals and NT to the VOE241’s ISDN BRI ports ..................................................25
Connecting the 10/100Base-T Ethernet LAN and WAN cables ................................................................25
Connecting the power supply ....................................................................................................................26
External S-Bus power supply .....................................................................................................................27
4Initial configuration...................................................................................................................................... 29
Introduction..........................................................................................................................................................30

7
VOE241 Getting Started Guide Table of Contents
1. Power up the VOE241......................................................................................................................................30
2. Set your PC to DHCP.......................................................................................................................................30
3. Connect the PC to the VOE241 LAN Port.......................................................................................................32
Open the configuration interface ....................................................................................................................32
4. Get Started ........................................................................................................................................................33
Accessing the Internet .....................................................................................................................................35
Connecting a PC and logging in .....................................................................................................................35
Bootloader.............................................................................................................................................................36
Start Bootloader ..............................................................................................................................................36
Start-up with factory configuration .................................................................................................................37
Load a new application image (VOE Firmware) via TFTP ..............................................................................37
ASpecifications ................................................................................................................................................ 40
DSP.......................................................................................................................................................................41
Voice connectivity .................................................................................................................................................41
Data connectivity ..................................................................................................................................................41
Voice processing (signalling dependent).................................................................................................................41
Fax and modem support........................................................................................................................................42
Voice signalling .....................................................................................................................................................42
Voice routing—session router................................................................................................................................42
IP services..............................................................................................................................................................42
Management .........................................................................................................................................................43
Operating environment .........................................................................................................................................43
Operating temperature ....................................................................................................................................43
Operating humidity ........................................................................................................................................43
System...................................................................................................................................................................43
Dimensions ...........................................................................................................................................................43
Weight and power dissipation ...............................................................................................................................44
BCabling ......................................................................................................................................................... 45
Introduction..........................................................................................................................................................46
Ethernet ................................................................................................................................................................46
ISDN BRI.............................................................................................................................................................47
CPort pin-outs ................................................................................................................................................ 48
Introduction..........................................................................................................................................................49
Ethernet ................................................................................................................................................................49
ISDN BRI 0/1 Phone (NT/Net) port....................................................................................................................49
ISDN BRI 0/0 Line (TE/Usr) port........................................................................................................................50
DVOE241 factory configuration ..................................................................................................................... 51
Introduction..........................................................................................................................................................52
EEnd user license agreement ........................................................................................................................... 61
End User License Agreement.................................................................................................................................62
1. Definitions ..................................................................................................................................................62
2. Title ............................................................................................................................................................62

8
VOE241 Getting Started Guide Table of Contents
3. Term ...........................................................................................................................................................62
4. Grant of License ..........................................................................................................................................62
5. Warranty ....................................................................................................................................................62
6. Termination ................................................................................................................................................63
7. Other licenses .............................................................................................................................................63

9
List of Figures
1 VOE241 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2 VOE241 rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3 VOE241 front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4 Internet telephony IAD application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5 ISDN home or branch office application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 Router front panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7 Model VOE241 external 40-VDC power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8 Displaying the Network Connections window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9 Displaying the Internet Properties (TCP/IP) Properties window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10 Connecting the VOE241 to the network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11 Login window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12 Main GUI elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
13 WAN page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
14 Typical Ethernet straight-through cable diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
15 Connecting an ISDN device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

10
List of Tables
1 General conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2 Rear panel ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3 VOE241 LED definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4 Sample site log entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5 PM-BRI-EXT S-Bus 40V power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6 VOE241 weight and maximum power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7 RJ-45 socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8 RJ-45 socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9 RJ-45 socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

11
About this guide
This guide describes the VOE241 hardware, installation and basic configuration.
Audience
This guide is intended for the following users:
•Operators
•Installers
•Maintenance technicians
Structure
This guide contains the following chapters and appendices:
•Chapter 1 on page 15 provides information about router features and capabilities
•Chapter 2 on page 19 contains an overview describing router operation and applications
•Chapter 3 on page 22 provides hardware installation procedures
•Chapter 4 on page 29 provides initial procedures for configuring the VOE241 router
•Appendix A on page 40 contains specifications for the routers
•Appendix B on page 45 provides cable recommendations
•Appendix C on page 48 describes the router’s ports and pin-outs
•Appendix D on page 51 lists the factory configuration settings for VOE241
•Appendix E on page 61 provides license information that describes acceptable usage of the software pro-
vided with the VOE241
For best results, read the contents of this guide before you install the router.

12
VOE241 Getting Started Guide About this guide
Precautions
Notes, cautions, and warnings, which have the following meanings, are used throughout this guide to help you
become aware of potential problems. Warnings are intended to prevent safety hazards that could result in per-
sonal injury. Cautions are intended to prevent situations that could result in property damage or
impaired functioning.
Note
A note presents additional information or interesting sidelights.
Safety when working with electricity
The alert symbol and IMPORTANT heading calls attention to
important information.
The alert symbol and CAUTION heading indicate a potential haz-
ard. Strictly follow the instructions to avoid property damage.
The shock hazard symbol and CAUTION heading indicate a
potential electric shock hazard. Strictly follow the instructions to
avoid property damage caused by electric shock.
The alert symbol and WARNING heading indicate a potential safety hazard.
Strictly follow the warning instructions to avoid personal injury.
The shock hazard symbol and WARNING heading indicate a potential electric
shock hazard. Strictly follow the warning instructions to avoid injury caused
by electric shock.
This device contains no user serviceable parts. The equipment shall be
returned to Black Box for repairs, or repaired by qualified service personnel.
The external power adaptor shall be a listed limited power source that incor-
porates a disconnect device and shall be positioned within easy reach of the
operator. The mains outlet shall be within 10 feet (3 meters) of the device,
shall be easily accessible, and protected by a circuit breaker.
IMPORTANT
CAUTION
CAUTION
WARNING
WARNING
WARNING
WARNING

13
VOE241 Getting Started Guide About this guide
General observations
•Clean the case with a soft slightly moist anti-static cloth
•Place the unit on a flat surface and ensure free air circulation
•Avoid exposing the unit to direct sunlight and other heat sources
•Protect the unit from moisture, vapors, and corrosive liquids
Ensure that the power cable used with this devise meets all applicable stan-
dards for the country in which it is to be installed, and that it is connected to
a wall outlet which has earth ground.
Hazardous network voltages are present in WAN ports regardless of whether
power to the unit is ON or OFF. To avoid electric shock, use caution when near
WAN ports. When detaching the cables, detach the end away from the device
first.
Do not work on the system or connect or disconnect cables during periods of
lightning activity.
Do not work on the system unless telephone network cables are disconnected
in order to prevent contact with telephone line voltages.
In accordance with the requirements of council directive 2002/96/EC on
Waste of Electrical and Electronic Equipment (WEEE), ensure that at end-of-life
you separate this product from other waste and scrap and deliver to the WEEE
collection system in your country for recycling.
WARNING
CAUTION
WARNING
CAUTION
WARNING
WARNING
WARNING

14
VOE241 Getting Started Guide About this guide
Typographical conventions used in this document
This section describes the typographical conventions and terms used in this guide.
General conventions
The procedures described in this manual use the following text conventions:
Table 1. General conventions
Convention Meaning
Garamond blue type
Indicates a cross-reference hyperlink that points to a figure, graphic, table, or sec-
tion heading. Clicking on the hyperlink jumps you to the reference. When you
have finished reviewing the reference, click on the Go to Previous View
button in the Adobe® Acrobat® Reader toolbar to return to your starting point.
Futura bold type Commands and keywords are in boldface font.
Futura bold-italic type Parts of commands, which are related to elements already named by the user, are
in boldface italic font.
Italicized Futura type Variables for which you supply values are in italic font
Futura type Indicates the names of fields or windows.
Garamond bold type Indicates the names of command buttons that execute an action.
< > Angle brackets indicate function and keyboard keys, such as <SHIFT>, <CTRL>,
<C>, and so on.
[ ] Elements in square brackets are optional.
{a | b | c} Alternative but required keywords are grouped in braces ({ }) and are separated
by vertical bars ( | )
blue screen Information you enter is in blue screen font.
screen Terminal sessions and information the system displays are in screen font .
node The leading IP address or nodename of a VOE241 is substituted with node in
boldface italic font.
VOE The leading VOE on a command line represents the nodename of the VOE241
# An hash sign at the beginning of a line indicates a comment line.

15
Chapter 1 General information
Chapter contents
VOE241 overview .................................................................................................................................................16
VOE241 rear panel .........................................................................................................................................17
VOE241 front panel .......................................................................................................................................18

VOE241 overview 16
VOE241 Getting Started Guide 1 • General information
VOE241 overview
The VOE241 ISDN Small Office/Home Office (SoHo) Gateway-Router (see figure 1) combines Ethernet
switching, IP routing, VPN/Security, and Quality of Service with high-quality Voice over IP (VoIP) delivered
on an ISDN S
0
(S/T) Basic Rate Interface (BRI). This combination allows you to leverage low-cost Internet
Telephony on existing ISDN Phones and PBX equipment for complete SoHo and branch office voice and data
connectivity.
Figure 1. VOE241
The VOE241 is equipped with a 10/100Base-T Ethernet WAN port and an integrated 4-port 10/100Base-T
Ethernet switch.
The VOE241 Gateway-Router performs the following major functions:
•Two channels of Voice over IP and local voice switching via 2 ISDN BRI S
0
ports, one NT port for connec-
tion to ISDN terminal equipment and one TE port for connection to the ISDN network/switch.
•A fallback cut-through relay between the two ISDN BRI ports electrically connects the NT and TE port
in case of power failure and enables life-line calls to the public ISDN network (PSTN-supplied ISDN
line must be used).
•Standard compliant VoIP in accordance with SIP or H.323 protocols.
•Internet access and IP Routing with IP Quality of Service (QoS) support for mixed voice and data traffic.

VOE241 overview 17
VOE241 Getting Started Guide 1 • General information
VOE241 rear panel
The VOE241 is a compact VoIP Gateway Router that supports two VoIP calls on two ISDN BRI ports (see
figure 2). The VOE241 rear panel ports are described in table 2.
Figure 2. VOE241 rear panel
Table 2. Rear panel ports
Port Description
WAN ETH 0/0
Auto-MDX Fast-Ethernet port, RJ-45 (see
figure 2
), connects the unit to an Ethernet WAN
device (for example, a cable modem, DSL modem, or fiber modem).
LAN (ETH 0/1) 1–4
Switched Auto-MDX Fast-Ethernet ports, RJ-45 (see
figure 2
), connect the unit to an Ether-
net LAN (for example, a PC, printer, or wireless bridge).
Line (BRI 0/0)
ISDN BRI TE (Usr) port, RJ-45
S0(S/T)-interface (see figure 2), connects the unit to an
ISDN NT. Point-to-point or point-to-multipoint configurable.
Phone (BRI 0/1) ISDN BRI NT (Net) port, RJ-45 S0(S/T)-interface (see figure 2), connects the unit to
an ISDN phone or PBX trunk-port. Point-to-point or point-to-multipoint configurable.
5V DC, 1.0A The Model VOE241 has a 5V DC power input (see figure 2).
Reset The reset button (see figure 2) has three functions:
•Restart the unit with the current startup configuration—Press (for less than 1 second)
and release the Reset button to restart the unit with the current startup configuration.
•Restart the unit with factory default configuration—Press the Reset button for
5 seconds until the Power LED (see figure 3 on page 18) starts blinking to restart
the unit with factory default configuration.
•Restart the unit in bootloader mode (to be used only by trained VOE241 techni-
cians)—Starting with the unit powered off, press and hold the Reset button as you
apply power to the unit. Release the Reset button when the Power LED starts blink-
ing so the unit will enter bootloader mode.

VOE241 overview 18
VOE241 Getting Started Guide 1 • General information
Figure 3. VOE241 front panel
VOE241 front panel
Figure 3 shows VOE241 LEDs, the LED definitions are listed in table 3.
Table 3. VOE241 LED definitions
LED Description
Note If an error occurs, all LEDs will flash once per second.
Power When lit, indicates power is applied and the unit is in normal operation. Off indi-
cates no power applied. Flashes once per second during boot (startup).
VoIP Link •On indicates the gateway is registered to an H.323 gatekeeper/SIP server, or,
in the case of direct routing, has at least one active VoIP connection.
•Off indicates the unit is not configured or registered, or has no active direct-
routed VoIP connection.
•Flashing green indicates that the unit is attempting to register or has failed
to register.
BRI (Phone and Line) Off indicates no active calls. Blinking when one or two B-channels are connected.
Ethernet
(LAN 1–4 and WAN)•On when the Ethernet connection on the corresponding port has a
link indication.
•Flashes when data is received or transmitted at the corresponding Ethernet port.
Digital VoIP Router
Digital VoIP Router

19
Chapter 2 Applications overview
Chapter contents
Introduction..........................................................................................................................................................20
Application—Multi-service ISDN Internet telephony IAD ...................................................................................20
Application—ISDN home or telecommuter connectivity......................................................................................21

Introduction 20
VOE241 Getting Started Guide 2 • Applications overview
Introduction
Black Box’s VOE241 VoIP Media Gateway Routers deliver the features you need for advanced multiservice
voice and data network applications. They combine high quality voice-over-IP with powerful quality of service
routing functions to build professional and reliable VoIP and data networks. This chapter describes typical
applications for which this VOE241 is uniquely suited.
Note Detailed configuration information for the applications can be found on the
CD-ROM that was included with your VOE241 device or online from the
Black Box webserver at www.blackbox.com.
Application—Multi-service ISDN Internet telephony IAD
The VOE241 with two ISDN BRI ports can be used to make and receive calls to and from the public ISDN
network and Internet Telephony services on any ISDN Terminal (Phone or PBX) (see figure 4). Using individ-
ually configurable routing tables, an outbound call can be directed to the local PSTN connection or to an
Internet telephony service provider (ISTP). Inbound calls from the Internet and the PSTN can ring the same
phone.
Figure 4. Internet telephony IAD application
Broadband network connectivity integrates with any fixed IP, DHCP or PPPoE service. An integrated 10/100
Ethernet LAN switch, with advanced routing features such as NAT, Firewall/ACL, DynDNS as well as
optional IPSec VPN, fulfills the requirements of demanding network users.
Quality of Service (QoS) features complete the offering with advanced voice prioritization and traffic manage-
ment. Black Box ’s patent-pending DownStreamQoS™ ensures voice without interruptions even over best-
effort Internet connections.