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Document Number: 64-0260-02
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Dialogic® 1000 and 2000 Media Gateway Series User’s Guide – September 200713
Dialogic Corporation
Contents
14Dialogic® 1000 and 2000 Media Gateway Series User’s Guide – September 2007
Dialogic Corporation
Revision History
This revision history summarizes the changes made in each published version of this document.
Document No.Publication DateDescription of Revisions
64-0260-02September 2007Updated to support Version 5.1 SU2 Software.
Added new DMG1004LS model.
Added note to say H.323 is only supported in Version 5.1 SU1 Software or earlier.
Chapter 3, “Parameter Reference” added new parameter in Serial Protocol
Parameters section for MCI Message Type.
Chapter 3, “Parameter Reference” added new parameters in Gateway Advanced
Group section for RTP Source IP Address Validation, RTP Source UDP Port
Validation, SNMP Community Name, SNMP System Name, SNMP System Contact,
SNMP System Location, and Telnet Server Enabled.
Chapter 3, “Parameter Reference” added new parameter in Session Initiation
Protocol (SIP) Parameters section for DNS Translation of Phone Numbers.
Chapter 5, “Dial Plan” added ability to manipulate Redirecting Party in the CPID
(Number) Manipulation section.
64-0260-01April 2007Updated to support Version 5.1 SU1 Software.
Global Updates: Changed product names and links from Intel to Dialogic.
The document number and title have been updated with new naming conventions.
The products previously known as Intel NetStructure PBX-IP Media Gateway (PIMG)
and T1/E1-IP Media Gateway (TIMG) are now Dialogic
(DMG1000) and Dialogic
changes, refer to New Product Naming Conventions.
Updated notes to say LAN2 is only supported in Version 5.1 SU1 Software or later.
Chapter 3, “Parameter Reference” added new parameters Client IP Address, Client
Subnet Mask, IP Management Interface, Ethernet Interface, Destination Address,
Destination Mask, Gateway Address, Call Progress Filter SNR in dB (DMG2000
Only), and Call Progress Filter Two Tones Max Twist in dB (DMG2000 Only).
Chapter 5, “Dial Plan” added new chapter.
Chapter 8, “Unit Status” added Section 8.5.1, “SNMP Agent”, on page 184,
Section 8.5.2, “Supported MIBs”, on page 185, and Section 8.5.3, “SNMP Alarms”,
on page 187.
Chapter 9, “Diagnostics” added Section 9.1, “VoIP Interface Test”, on page 195,
Section 9.2, “PBX/PSTN Interface Test”, on page 199, and Section 9.3, “PBX Self
Verification Test”, on page 203.
®
2000 Media Gateway (DMG2000). For more product name
®
1000 Media Gateway
C73213-002
Rev 01
November 2006Updated to support Version 5.1 Software.
Chapter 1, “Overview” added information about the DMG2120DTI model and added
"Security" section.
Chapter 3, “Parameter Reference” added various new parameters and added
"Security Parameters" section.
Chapter 7, “Data Security” added new chapter.
Removed the PBX configuration chapters from the User’s Guide.
C73213-001
Rev 01
Dialogic® 1000 and 2000 Media Gateway Series User’s Guide – September 200715
Dialogic Corporation
April 2006Initial version of document to support Version 5.0 Software.
Revision History
16Dialogic® 1000 and 2000 Media Gateway Series User’s Guide – September 2007
Dialogic Corporation
About This Publication
The following topics provide information about this guide:
• Purpose
• Intended Audience
• How to Use This Publication
• Related Information
Purpose
This document provides information about installing, configuring, operating, and maintaining the
Dialogic
®
Media Gateway.
Intended Audience
This information is intended for:
• Distributors
• System Integrators
• Value Added Resellers (VARs)
• Original Equipment Manufacturers (OEMs)
How to Use This Publication
This information is organized as follows:
• Chapter 1, “Overview” provides a description of the product and discusses call routing,
address translation, and the Web interface.
• Chapter 2, “Configuring the Media Gateway” provides procedures for configuring and
upgrading the Media Gateway.
• Chapter 3, “Parameter Reference” lists the Media Gateway parameters that can be configured
from the Web interface.
• Chapter 4, “Working with Call Progress Tones” describes how to view, edit, learn, and
validate call progress tones from the Web interface.
• Chapter 5, “Dial Plan” describes a set of rules used to define the characteristics of a call routed
through the Media Gateway.
• Chapter 6, “Media Gateway Parsers” describes the Media Gateway in-band Type I (on-hook)
and Type II (off-hook) integration parsers for analog units, and the display parser for digital
Dialogic® 1000 and 2000 Media Gateway Series User’s Guide — September 200717
Dialogic Corporation
About This Publication
units. These parsers allow the user to define the meaning of either the in-band/on-hook
integration strings or display strings received from the telephony network.
• Chapter 7, “Data Security” provides information about configuring security on the Media
Gateway for HTTP, call control, and voice.
• Chapter 8, “Unit Status” describes the various types of status information that may be obtained
about the Media Gateway.
• Chapter 9, “Diagnostics” provides information about using diagnostic logging, running the
PBX self test, and using the various terminal commands to perform diagnostics on the Media
Gateway.
Note: The products previously known as Intel NetStructure PBX-Media Gateway and T1/E1-Media
Gateway are now Dialogic
Gateway (DMG2000). For more product name changes, refer to New Product Naming
Conventions.
New Product Naming Conventions
PBX-IP Media GatewayDialogic
PIMGDMG1000
PIMG40LSDMG1004LS
PIMG80LSDMG1008LS
PIMG80DNIDMG1008DNI
PIMG80MTLDNIDMG1008MTLDNI
PIMG80RLMDNIDMG1008RLMDNI
T1/E1-IP Media GatewayDialogic
TIMGDMG2000
TIMG300DTIDMG2030DTI
TIMG600DTIDMG2060DTI
TIMG1200DTIDMG2120DTI
®
1000 Media Gateway (DMG1000) and Dialogic® 2000 Media
Previous NameNew Name
®
1000 Media Gateway
(DMG1000)
®
2000 Media Gateway
(DMG2000)
Related Information
For additional information related to the Dialogic® 1000 Media Gateway (DMG1000) and
Dialogic
18Dialogic® 1000 and 2000 Media Gateway Series User’s Guide — September 2007
®
2000 Media Gateway (DMG2000) products, see the following:
• Dialogic® 1000 and 2000 Media Gateway Series Getting Started Guide for information about
installing, cabling, and initializing the product prior to performing configuration and operation
tasks.
• Dialogic® Media Gateway Installation and Configuration Integration Notes for details on
typical installation and configuration of Media Gateway when used to interface between PBX
and unified messaging application. Available at:
http://www.dialogic.com/support/helpweb/mg/integration.htm
The Media Gateway is a telephony gateway appliance that connects to phone lines through its
telephony interface and connects to a LAN via a 10 BaseT or 100 BaseT Ethernet connector.
NOTE: Throughout this document, the term Media Gateway addresses information that applies to
both the DMG1000 and DMG2000 products. The term DMG1000 applies only to
information relating to the DMG1000 product and the term DMG2000 applies only to
information relating to the DMG2000 product.
1
The Media Gateway provides an inexpensive bridge between a legacy PBX or public switched
telephone network (PSTN) and a managed packet network. This device converts signals from
circuit switched equipment into either H.323 or Session Initiation Protocol (SIP) standard protocol
for transmission over a local area network (LAN) or wide area network (WAN) to communications
devices such as IP phones, wireless phones, and IP servers in almost any location.
Note: H.323 is only supported in Version 5.1 SU1 Software or earlier.
The DMG1000 is available in the following models:
• DMG1008MTLDNI - Supports phone emulation mode for Mitel digital PBXs.
• DMG1008DNI - Supports phone emulation mode for a number of digital PBXs, including
Avaya, Nortel, NEC, and Siemens.
• DMG1008RLMDNI - Supports phone emulation mode for Rolm 8000 and 9751 switches.
• DMG1008LS, DMG1004LS - Supports phone emulation mode for analog interfaces.
The DMG2000 is available in the following models:
• DMG2030DTI - Supports phone emulation mode for a single T1 or E1 interface.
• DMG2060DTI - Supports phone emulation mode for two T1 or E1 interfaces.
• DMG2120DTI - Supports phone emulation mode for four T1 or E1 interfaces.
Note: The Item Market Name on the Media Gateway may vary slightly, depending on the version.
Dialogic® 1000 and 2000 Media Gateway Series User’s Guide — September 200721
Dialogic Corporation
Overview
Depending on the model, the Media Gateway can be configured for the following operating mode:
• Phone Emulating
1.1.1Phone Emulating
In the Phone Emulating mode, the Media Gateway operates as a telephony gateway appliance that
emulates:
• up to eight station sets (DMG1000 models)
• up to 24 station sets (single T1 DMG2000 model)
• up to 48 station sets (dual T1 DMG2000 model)
• up to 96 station sets (quad T1 DMG2000 model)
• up to 30 station sets (single E1 DMG2000 model)
• up to 60 station sets (dual E1 DMG2000 model)
• up to 120 station sets (quad E1 DMG2000 model)
for transporting PBX functionality over a packet-switched network.
The Media Gateway translates protocols for call setup and release between the IP network and the
PBX or PSTN, and converts the media formats between the two networks.
Figure 1shows how the Media Gateway provides a gateway between voice over IP (VoIP) devices
(H.323 or SIP) on a LAN and the PBX. By emulating station sets to the proprietary PBX, the
Media Gateway provides full call party information to the IP network.
Note: H.323 is only supported in Version 5.1 SU1 Software or earlier.
The DMG2000 or the analog version (DMG1008LS, DMG1004LS) of the DMG1000 can also
connect directly to the PSTN, as shown in Figure 2.
22Dialogic® 1000 and 2000 Media Gateway Series User’s Guide — September 2007
Note: The T1/E1 Models must only be connected to
the PSTN through an NTU, CSU or other
device that provides line isolation.
PIMG80LS
PBX-IP Media Gateway
or
T1/E1 IP Media Gateway
LAN
VoIP
Terminal
Device
VoIP
Terminal
Device
VoIP
Terminal
Device
Dialogic® 1000 and 2000 Media Gateway Series User’s Guide — September 200723
Dialogic Corporation
Overview
1.1.1.1Serial Protocol Support in Phone Emulating Mode
By emulating telephone sets to the switch, the Media Gateway provides call party information over
the IP network. However, the amount of call party information that the Media Gateway can provide
is limited to the amount of data that the switch provides its station sets. Some proprietary switches
provide full call party information across the station set interfaces while others provide little or no
call party information across the station set interface. The PBX switches that provide little or no
call party information typically will provide full call party information across a separate serial
interface connection.
For this reason, the Media Gateway supports a serial link interface to the switch or PSTN, and
supports several serial protocols. Figure 3 shows how the Media Gateway connects to a switch or
PSTN that uses a serial link to provide call party information. Using this serial link, the Media
Gateway is able to provide full call party information on a PBX switch or PSTN that provides little
or no call party information via their station set interfaces.
Figure 3. IP Gateway Using Serial Link
VoIP
Terminal
Device
VoIP
Terminal
Device
PSTN
Digital PBX
Note: Only the Analog and T1/E1 Models
can connect to the PSTN.
Serial Link
IP Media Gateway
(Phone Emulating)
1 - 8
Phone Lines
or
1 - 4 T1/E1
Trunks
Note: The T1/E1 Models must only be connected to
the PSTN through an NTU, CSU or other
device that provides line isolation.
LAN
When a call arrives at a telephony port on the Media Gateway, the switch or PSTN will send a data
packet across the serial link containing the call party information associated with the call. If
configured to use the serial interface, the Media Gateway will use the data in the serial packet as the
call party information when the call notification is sent across the IP network to the VoIP terminal
device that the call is intended for - superseding any call information that may have arrived across
the station set interface. Finally, the serial protocols also support the message waiting indication
(MWI) feature that allows the Media Gateway to control message indications on telephone sets
connected to the switch or PSTN.
24Dialogic® 1000 and 2000 Media Gateway Series User’s Guide — September 2007
Dialogic Corporation
For DMG1000 types, the serial link from the switch is connected to the serial port interface on the
DMG1000 (DIAGNOSTICS connector). Table 1, "DIAGNOSTICS Connector Pin Designations"
in the Getting Started Guide shows the connector pin designations.
For DMG2000 types, the serial link from the switch is connected to the serial port interface on the
DMG2000 (COM 1 or COM 2 connector). Table 4, "COM 1 and COM 2 Connector Pin
Designations" in the Getting Started Guide shows the connector pin designations.
The switch only provides a single serial link connection. At a site where there are multiple Media
Gateway units, only one of the units can be physically connected to the switch or PSTN serial link.
This unit is the serial protocol Master Media Gateway while the remaining units are considered
serial protocol slaves. Figure 4 shows how multiple Media Gateways connect to a switch or PSTN
that uses a serial link to provide call party information. It is the responsibility of the Master
gateway to send all serial link data intended for Slave Gateways to the Slave Gateways across the
IP network. Similarly, anytime a Slave Gateways needs to communicate to the switch or PSTN
across the serial link, the slave unit sends the data across the IP link to the Master Gateway. The
Master Gateway will then send the data across the serial link on behalf of the slave device.
Figure 4. Multiple IP Gateways Using Serial Link
Overview
PSTN
Digital PBX
Note: Only the Analog and T1/E1 Models
can connect to the PSTN.
Serial Link
IP Media Gateway
(Phone Emulating)
1 - 8 Phone Lines
or 1 - 4
T1/E1 Lines
1 - n Phone Lines
or T1/E1 Lines
Note: The T1/E1 Models must only be connected to
the PSTN through an NTU, CSU or other
device that provides line isolation.
Master Gateway
IP Media Gateway
(Phone Emulating)
Slave Gateways
LAN
VoIP
Terminal
Device
VoIP
Terminal
Device
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Dialogic Corporation
Overview
The Media Gateway supports the following serial protocols:
• SMDI (Simple Message Desk Interface)
• MCI (NEC Systems only)
• MD110 (Ericsson Systems only)
Both the serial interface and the selection of which serial protocol to use are configurable using the
Web interface. Refer to Chapter 3, “Parameter Reference” for information about configuring the
serial interface and serial protocols.
1.2Call Routing in Phone Emulating Mode
The Media Gateway routes calls from the Switch network to a VoIP destination on the IP network.
Conversely, it routes calls from the IP network through a Switch port to a destination telephone
number on the Switch network. The Media Gateway supports the following call routing options:
• User configurable list of VoIP Servers
• IP load Balancing
• IP Fault Tolerance
In its simplest form, call routing is supported by configuring a single VoIP Server to receive and/or
originate calls through the Media Gateway. In this manner, all inbound Switch-to-IP calls will be
sent to the single user configured VoIP endpoint. For IP-to-Switch calls, the telephony port will be
selected in a round robin fashion – where each IP-to-Switch call will be routed to the next available
telephony port.
If the user configures more than one VoIP Server to receive and/or originate calls through the
Media Gateway, then the user has the option to have the incoming Switch-to-IP calls load balanced
between the configured VoIP Servers. Specifically, incoming Switch calls will be routed to a VoIP
server in a round-robin fashion. For example, if there are three (3) VoIP Servers configured, the
first call will be routed to the first VoIP server, the second call will be routed to the second VoIP
server, the third call will be routed to the third VoIP server. The next call will be routed to the first
VoIP Server and the process will start all over again. IP-to-Switch calls are handled in the same
way when multiple VoIP Servers are configured as when only a single VoIP server is configured
(i.e. in a round robin fashion).
If the user configures more than one VoIP Server to receive and/or originate calls through the
Media Gateway, then the user has the option to support fault tolerance on the incoming Switch-toIP calls. Specifically, if the VoIP server fails to respond to incoming Switch call (or responds with
an error), the Media Gateway will route the call to the next VoIP Server in the user configurable list
of VoIP Servers.
Note: If both IP Load Balancing and Fault Tolerance are enabled, then incoming IP-to-Switch calls will
be routed to the configured VoIP Servers in a round robin fashion and, if at any time a VoIP Server
fails to respond or responds with any error, the Media Gateway will route the call to the next
available VoIP Server.
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1.2.1Un-Routable Calls
A call is un-routable by the Media Gateway if the unit is unable to route the call to the other
network. This may occur if there is insufficient destination address information to determine a
destination for the call, or if there are not enough free resources on the Media Gateway to route the
call. The Media Gateway provides a number of different ways to handle these conditions in order to
insure that no calls are dropped or not completed.
1.2.1.1IP to Switch Calls
There are a few circumstances where an inbound IP call may not be routed to the Switch network.
They are the following:
• No available Switch Ports
– There are no available Media Gateway Switch ports on which to carry the call.
• Invalid or No Switch destination address specified
– The IP call information does not contain a valid E.164 destination address for the Switch
network.
The administrator may specify a default destination IP address that is to receive any inbound IP
calls that cannot be routed to the Switch. If the administrator specifies a default destination IP
address for un-routable IP calls, then any inbound IP call that cannot be routed to the Switch
network is forwarded to the specified default IP address. If the administrator does not specify a
default destination IP address, then any inbound IP call that cannot be routed to the Switch is
rejected by the Media Gateway.
Overview
1.2.1.2Switch to IP Calls
There are a few circumstances in which an inbound Switch call may not be routed to the IP
network. They are the following:
• IP destination not configured.
• IP destination not present.
The administrator may specify a default destination Switch extension that is to receive any inbound
Switch calls that cannot be routed to the IP network. If the administrator specifies a default
destination Switch extension for un-routable Switch calls, then any inbound Switch call that cannot
be routed to the IP network is transferred to the specified default Switch extension. If the
administrator does not specify a default destination Switch extension, then any inbound Switch call
that cannot be routed to the IP network is ignored by the Media Gateway.
1.3Voice over IP Address Translation
The Voice over IP (VoIP) Address Translator provides network services to H.323 or SIP devices
such as the Media Gateway. H.323 devices register with the VoIP Address Translator to send and
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Dialogic Corporation
Overview
Note: In H.323 mode, the VoIP Address Translator is a Gatekeeper. In SIP mode, the VoIP Address
Note: H.323 is only supported in Version 5.1 SU1 Software or earlier.
receive H.323 calls. SIP devices register with the VoIP Address Translator to sent and receive SIP
calls.
Translator is a SIP Registration Server and/or a SIP Proxy Server.
The VoIP Address Translator can provide network services such as:
• Controlling the number and type of connections allowed across the network.
• Helping to route a call to the correct destination.
• Determining and maintaining the network address for incoming calls.
Without a VoIP Address Translator, all IP destination addresses must be specified to the Media
Gateway as IP v4 addresses (ex. 10.10.4.128). IP terminal devices must also explicitly specify the
IP address of the Media Gateway as the desired gateway when originating PBX calls.
With a VoIP Address Translator, IP destination addresses may be specified to the Media Gateway
as e-mail addresses, alphanumeric aliases, E.164 telephone numbers, domain names, and any other
format supported by the VoIP Address Translator. IP terminal devices may explicitly specify the IP
address of the Media Gateway as the desired gateway, or they may rely on the VoIP Address
Translator to address the Media Gateway using the gateway prefix configured on the Media
Gateway.
1.4Security
The Media Gateway supports two kinds of security:
• Access Security
• Data Security
1.4.1Access Security
Access to the Media Gateway is secured by requiring a user-name and password to login to the
gateway. The user-name and password are required for all interfaces of the Media Gateway (Web
interface, serial interface, and telnet interface).
1.4.2Data Security
Data security for the Media Gateway includes the use of various secure protocols when
transmitting and receiving data. The Media Gateway supports security for three types of data:
• HTTP security - Data transmitted between the Media Gateway and a Web browser. To secure
HTTP, the Media Gateway uses HTTPS protocol.
• Call Control security - Data used to setup and tear down a call. To secure Call Control, the
Media Gateway uses Transport Layer Security (TLS) on top of SIP.
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• Voice security - The actual conversation once a call is connected. To secure voice, the Media
Gateway uses SRTP.
Note: Security is not provided over H.323. If H.323 is selected instead of SIP, TLS and SRTP are not
supported and call control and voice data cannot be secured.
Note: H.323 is only supported in Version 5.1 SU1 Software or earlier.
Because, for security, the HTTPS and TLS protocols also require digital identity certificates (e.g.
public key certificates), Certificate Configuration and Management is also provided by the Media
Gateway.
For additional information about how the Media Gateway supports security, see Chapter 7, “Data
Security”.
1.5Web Interface
The Web interface is accessed from a workstation on the Ethernet connected to the LAN connector
on the rear panel of the Media Gateway. Communication is established by starting a Web browser
at the workstation and entering the IP address of the Media Gateway. The unit's Web interface is
password protected and the password can be changed by the system administrator. Figure 5 shows
a typical Web interface page for a DMG1000 unit and Figure 6 shows a typical Web interface page
for a DMG2000 unit.
Overview
Dialogic® 1000 and 2000 Media Gateway Series User’s Guide — September 200729
Dialogic Corporation
Overview
Figure 5. DMG1000 Web Interface
30Dialogic® 1000 and 2000 Media Gateway Series User’s Guide — September 2007
Dialogic Corporation
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