ISDN-BRI MultiVOIP Units (Models MVP410ST, and MVP810ST)
Digital MultiVOIP Units (Models MVP2400, MVP2410, & MVP3010)
Upgrade Units (MVP24-48 and MVP30-60)
This publication may not be reproduced, in whole or in part, without prior expressed
written permission from Multi-Tech Systems, Inc. All rights reserved.
Multi-Tech Systems, Inc. makes no representations or warranties with respect to the
contents hereof and specifically disclaims any implied warranties of merchantability or
fitness for any particular purpose. Furthermore, Multi-Tech Systems, Inc. reserves the
right to revise this publication and to make changes from time to time in the content
hereof without obligation of Multi-Tech Systems, Inc. to notify any person or
organization of such revisions or changes.
Record of Revisions
RevisionDescription
AInitial Release. (05/10/02)
BIndex added. (05/24/02)
CUpdated for 4.03/6.03 software. (10/11/02)
DUpdated for 4.04/6.04/8.04/9.04 software. (03/20/03) Add
embedded gatekeeper models, ISDN-BRI models,
MultiVantage Apx., SPP protocol, & Call State Apx.
ERemove MultiVantage. (04/18/03)
FUpdate ISDN-BRI info in SW version 5.02c. (06/04/03)
GAdd MVP130 information. (06/30/03)
HRevisions to ISDN-BRI & MVP130 content. (08/15/03)
(Models MVP130, MVP210, MVP410, MVP810,
MVP210G, MVP410G, and MVP810G)
Patents
This Product is covered by one or more of the following U.S. Patent Numbers:
The table below describes the vital characteristics of these various models.
9
OverviewMultiVOIP User Guide
MultiVOIP Product Family
Description
Model
MVP
2400
FunctionT1
digital
VOIP
unit
Capacity24
channels24channels24added
Chassis/
Mounting
Description
Model
Table
top
MVP
810 (G)
Functionanalog
voip
Capacity8
channels
Chassis/
Mounting
19” 1U
rack
mount
MVP-
2410
T1
digital
VOIP
unit
19” 1U
rack
mount
MVP
428 (G)
add-on
card
4 added
channels4channels2channels
circuit
card
only
MVP
24-48
T1
digital
VOIP
add-on
card
channels
circuit
card
only
MVP
410 (G)
analog
voip
19” 1U
rack
mount
MVP
3010
E1
digital
VOIP
unit
30
channels30added
19” 1U
rack
mount
MVP
210 (G)
Analog
voip
Table
top
MVP
30-60
E1
digital
VOIP
add-on
card
channels
circuit
card
only
MVP
130
Analog
voip
1
channel
table
top
Description
Model
MVP810STMVP410ST
FunctionISDN-BRI voipISDN-BRI voip
Capacity4 ISDN lines
(8 B-channels)
Chassis/
19” 1U rack mount19” 1U rack mount
2 ISDN lines
(4 B-channels)
Mounting
1. “G” models have embedded Gatekeeper.
2. “BRI” means Basic Rate Interface.
10
MultiVOIP User GuideOverview
How to Use This Manual. In short, use the index and the examples.
When our readers crack open this large manual, they generally need one of two
things: information on a very specific software setting or technical parameter
(about telephony or IP) or they need help when setting up phonebooks for their
voip systems. The index gives quick access to voip settings and parameters.
It’s detailed. Use it. The best way to learn about phonebooks is to wade
through examples like those in our chapters on T1 (North American standard)
Phonebooks and E1 (Euro standard) Phonebooks. Also, the quick setup info of
the printed Quick Start Guide is replicated in this manual for your convenience.
Finally, this manual is meant to be comprehensive. If you notice that
something important is lacking, please let us know.
Additional Resources. The MultiTech web site (www.multitech.com) offers
both a list of Frequently Asked Questions (the MultiVOIP FAQ) and a
collection of resolutions of issues that MultiVOIP users have encountered
(these are Troubleshooting Resolutions in the searchable Knowledge Base).
Variable Model/Version Icon and Typography. The MultiVOIP product
family is a coordinated set of products that can operate with each other in a
seamless fashion. For example, both the digital and analog MultiVOIP units
use the same graphic user interface (GUI) in the MultiVOIP configuration
software and both operate under a single GUI in the MultiVoipManager remote
management software. Because this is the case, the various model numbers and
version numbers of MultiVOIP family products will each appear in various
dialog boxes and commands. But instead of showing these dialog boxes once
for each model in this manual, we substitute the following icon.
Figure 1-1: Variable Model/Version Icon
It indicates that, whatever MultiVOIP model you are using, all details except
the very model and version numbers themselves will be the same regardless of
the MultiVOIP model used. Also, in some cases, we will use other
typographic devices, like blank underlining
(“MultiVOIP ____”) to denote information that applies to any
and all of the products in this product family.
11
OverviewMultiVOIP User Guide
Introduction to TI MultiVOIPs (MVP2400,
MVP2410, & MVP24-48)
We proudly present MultiTech’s T1 Digital Multi-VOIP products.
The MVP2400 is a tabletop model; the MVP2410 is a rack-mount model; and
the MVP24-48 is an add-on expansion card that doubles the capacity of the
MVP2410 without adding another chassis. All of these voice-over-IP products
have fax capabilities. All of these models adhere to the North American
standard of T1 trunk telephony using digital 24-channel time-division
multiplexing, which allows 24 phone conversations to occur on the T1 line
simultaneously. All can also accommodate T1 lines of the ISDN Primary Rate
Interface type (ISDN-PRI).
Scale-ability. The MVP2400 and MVP2410 are tailored to companies needing
more than a few voice-over-IP lines, but not needing carrier-class equipment.
When expansion is needed, the MVP2410 can be field-upgraded into a dual T1
unit by installing the MVP24-48 kit, which is essentially a second MultiVOIP
motherboard that fits in an open expansion-card slot in the MVP2410. The
upgraded dual unit then accommodates two T1 lines.
T1 VOIP Traffic. The MVP-2400/2410 accepts its outbound traffic from a T1
trunk that’s connected to either a PBX or to a telco/carrier. The MVP2400/2410 transforms the telephony signals into IP packets for transmission on
LANs, WANs, or the Internet. Inbound IP data traffic is converted to
telephony data and signaling.
When connected to PBX. When connected to a PBX, the MVP-2400/2410
creates a network node served by 10/100-Base T connections. Local PBX
phone extensions gain toll-free access to all phone stations directly connected
to the VOIP network. Phone extensions at any VOIP location also gain tollfree access to the entire local public-switched telephone network (PSTN) at
every other VOIP location in the system.
When connected to PSTN. When the T1 line(s) connected to the MVP2400/2410 are connected directly to the PSTN, the unit becomes a Point-ofPresence server dedicated to local calls off-net.
12
MultiVOIP User GuideOverview
H.323, SIP & SPP. Being H.323 compatible, the MVP-2400/2410 can place
calls to telephone equipment at remote IP network locations that also contain
H.323 compatible voice-over-IP gateways. It will interface with H.323
software and H.323 gatekeeper units. H.323 specifications also bring to voip
telephony many special features common to conventional telephony. H.323
features of this kind that have been implemented into the MultiVOIP include
Call Hold, Call Waiting, Call Name Identification, Call Forwarding (from the
H.450 standard), and Call Transfer (H.450.2 from H.323 Version 2). The
fourth version of the H.323 standard improves system resource usage (esp.
logical port or socket usage) by handling call signaling more compactly and
allowing use of the low-overhead UDP protocol instead of the error-correcting
TCP protocol where possible.
The MultiVOIP is also SIP-compatible. (“SIP” means Session Initiation
Protocol.) However, H.450 Supplementary Services features can be used under
H.323 only and not under SIP.
SPP (Single-Port Protocol) is a non-standard protocol developed by MultiTech. SPP is not compatible with the “Proprietary” protocol used in MultiTech’s earlier generation of voip gateways. SPP offers advantages in certain
situations, especially when firewalls are used and when dynamic IP address
assignment is needed. However, when SPP is used, certain features of SIP and
H.323 will not be available and SPP will not inter-operate with voip systems
using H.323 or SIP.
Data Compression & Quality of Service. The MultiVOIP2400/2410 comes
equipped with a variety of data compression capabilities, including G.723,
G.729, and G.711 and features DiffServ quality-of-service (QoS) capabilities.
VOIP Functions. The MultiVOIP MVP-2400/2410 gateway performs four
basic functions: (a) it converts a dialed number into an IP address, (b) it sends
voice over the data network, (c) it establishes a connection with another VOIP
gateway at a remote site, and (d) it receives voice over the data network. Voice
is handled as IP packets with a variety of compression options. Each T1
connection to the MultiVOIP provides 24 time-slot channels to connect to the
telco or to serve phone or fax stations connected to a PBX.
Ports. The MVP2400 and MVP2410 each have one 10/100 Mbps Ethernet
LAN interface and one Command port for configuration. An MVP2410
upgraded with the MVP24-48 kit will have two Ethernet LAN interfaces and
two Command ports.
PSTN Failover Feature. The MultiVOIP can be programmed to divert calls
to the PSTN temporarily in case the IP network fails.
Gatekeeper. T1 voip systems can have gatekeeper functionality either by
adding, as an endpoint, either a Multi-Tech standalone gatekeeper (special
software residing in separate hardware), or an analog gateway with embedded
gatekeeper functionality (MVP210G, MVP410G, or MVP810G). Gatekeepers
are optional but useful within voip systems. The gatekeeper acts as the
13
OverviewMultiVOIP User Guide
‘clearinghouse’ for all calls within its zone. MultiTech’s embedded and standalone gatekeeper software packages both perform all of the standard
gatekeepers functions (address translation, admission control, bandwidth
control, and zone management) and also support many valuable optional
functions (call control signaling, call authorization, bandwidth management,
and call management). The stand-alone gatekeeper is, however, slightly more
feature-rich than the embedded gatekeeper. For more details, see the
“Embedded Gatekeeper” chapter of this manual and the manual on
MultiTech’s stand-alone gatekeeper.
Management. Configuration and system management can be done locally
with the MultiVOIP configuration software. After an IP address has been
assigned locally, other configuration can be done remotely using the
MultiVOIP web browser GUI. Remote system management can be done with
the MultiVoipManager SNMP software or via the MultiVOIP web browser
GUI. All of these control software packages are included on the Product CD.
14
MultiVOIP User GuideOverview
While the web GUI’s appearance differs slightly, its content and organization
are essentially the same as that of the Windows GUI (except for logging).
The primary advantage of the web GUI is remote access for control and
configuration. The controller PC and the MultiVOIP unit itself must both be
connected to the same IP network and their IP addresses must be known.
Once you’ve begun using the web browser GUI, you can go back to the
MultiVOIP Windows GUI at any time. However, you must log out of the web
browser GUI before using the MultiVOIP Windows GUI.
15
OverviewMultiVOIP User Guide
Logging of System Events. MultiTech has built SysLog Server functionality
into the software of the MultiVOIP units. SysLog is a de facto standard for
logging events in network communication systems.
The SysLog Server resides in the MultiVOIP unit itself. To implement this
functionality, you will need a SysLog client program (sometimes referred to as
a “daemon”). SysLog client programs, both paid and freeware, can be obtained
from Kiwi Enterprises, among other firms. See www.kiwisyslog.com. SysLog
client programs essentially give you a means of structuring console messages
for convenience and ease of use.
MultiTech Systems does not endorse any particular SysLog client program.
SysLog client programs by any qualified provider should suffice for use with
MultiVOIP units. Kiwi’s brief description of their SysLog program indicates
the typical scope of such programs. “Kiwi Syslog Daemon is a freeware
Syslog Daemon for the Windows platform. It receives, logs, displays and
forwards Syslog messages from hosts such as routers, switches, Unix hosts and
any other syslog enabled device. There are many customizable options
available.”
16
MultiVOIP User GuideOverview
Supplementary Telephony Services. The H.450 standard (an addition to
H.323) brings to voip telephony more of the premium features found in PSTN
and PBX telephony. MultiVOIP units offer five of these H.450 features: Call
Transfer, Call Hold, Call Waiting, Call Name Identification (not the same as
Caller ID), and Call Forwarding. (The first four features are found in the
“Supplementary Services” window; the fifth, Call Forwarding, appears in the
Add/Edit Inbound phonebook screen.) Note that the first three features are
closely related. All of these H.450 features are supported for H.323 operation
only; they are not supported for SIP or SPP.
T1 Front Panel LEDs
The MVP2400, MVP2410, and MVP24-48 all use a common main circuit
board or motherboard. Consequently the LED indicators are the same for all.
Figure 1-2. MultiVOIP MVP2400 Front Panel
Active LEDs. The MVP2410 front panel has two sets of identical LEDs. In
the MVP2410 as shipped (that is, without an expansion card), the left-hand set
of LEDs is functional whereas the right-hand set is not.
When the MVP2410 has been upgraded with an MVP24-48 kit, the right-hand
set of LEDs will also become active.
Figure 1-3. MultiVOIP MVP2410x Chassis
T1 LED Descriptions
The descriptions below apply to all digital T1 MultiVOIP units. The
MVP2410 has four sets of LEDs plus a lone LED at its far right end. As
viewed from the front of the MVP2410, it is the two left groups that are active
and present feedback about the operation of the unit. If an MVP24-48
expansion card is added to the MVP2410, the two LED groups on the right
become operational with respect to the second T1 connection.
17
OverviewMultiVOIP User Guide
MVP2400/2410 Front Panel LED Definitions
LED NAMEDESCRIPTION
PowerIndicates presence of power.
Boot
After power up, the Boot LED will be on for about 10
seconds while the MVP2400/2410 is booting.
RCVReceive. Lights when receiving data on Ethernet port.
XMTTransmit. Lights when transmitting data on Ethernet
port.
LNKLink. When lit, VOIP “sees” the hub or network via
the Ethernet connection.
COLCollision. Lit when data collisions occur.
T1When lit, indicates presence of T1 connection.
E1E1. Not supported.
PRIPRI. On if T1 line is of ISDN-Primary-Rate type.
ONLOnline. This LED is on when frame synchroni-zation
has been established on the T1/E1 link.
ICIC LED is on when Internal Clocking is selected in
T1/E1 configuration.
LCIndicates Loss of Carrier.
LSIndicates Loss of Signal.
TestFor testing purposes only.
18
MultiVOIP User GuideOverview
Introduction to EI MultiVOIPs
(MVP3010 & MVP30-60)
We proudly present MultiTech’s E1 Digital Multi-VOIP products. The
MVP3010 is a rack-mount model and the MVP30-60 is an add-on expansion
card that doubles the capacity of the MVP3010 without adding another chassis.
All of these voice-over-IP products have fax capabilities. All adhere to the
European standard of E1 trunk telephony using digital 30-channel timedivision multiplexing, which allows 30 phone conversations to occur on the E1
line simultaneously. All can also accommodate E1 lines of the ISDN Primary
Rate Interface type (ISDN-PRI).
Scale-ability. The MVP3010 is tailored to companies needing more than a
few voice-over-IP lines, but not needing carrier-class equipment. When
expansion is needed, the MVP3010 can be field-upgraded into a dual E1 unit
by installing the MVP30-60 kit, which is essentially a second MultiVOIP
motherboard that fits into an open expansion-card slot in the MVP3010. The
upgraded dual unit then accommodates two E1 lines.
E1 VOIP Traffic. The MVP3010 accepts its outbound traffic from an E1
trunk that’s connected to either a PBX or to a telco/carrier. The MVP3010
transforms the telephony signals into IP packets for transmission on LANs,
WANs, or the Internet. Inbound IP data traffic is converted to telephony data
and signaling.
When connected to PBX. When connected to a PBX, the MVP3010 creates a
network node served by 10/100-Base T connections. Local PBX phone
extensions gain toll-free access to all phone stations directly connected to the
VOIP network. Phone extensions at any VOIP location also gain local-rate
access to the entire local public-switched telephone network (PSTN) at every
other VOIP location in the system.
When connected to PSTN. When the E1 line(s) connected to the MVP3010
are connected directly to the PSTN, the unit becomes a Point-of-Presence
server dedicated to local calls off-net.
19
OverviewMultiVOIP User Guide
H. 323, SIP, & SPP. Being H.323 compatible, the MVP3010 can place calls
to telephone equipment at remote IP network locations that also contain H.323
compatible voice-over-IP gateways. It will interface with H.323 software and
H.323 gatekeeper units. H.323 specifications also bring to voip telephony
many special features common to conventional telephony. H.323 features of
this kind that have been implemented into the MultiVOIP include Call Hold,
Call Waiting, Call Identification, Call Forwarding (from the H.450 standard),
and Call Transfer (H.450.2 from H.323 Version 2). The fourth version of the
H.323 standard improves system resource usage (esp. logical port or socket
usage) by handling call signaling more compactly and allowing use of the lowoverhead UDP protocol instead of the error-correcting TCP protocol where
possible.
The MultiVOIP is also SIP-compatible. (“SIP” means Session Initiation
Protocol.) However, H.450 Supplementary Services features can be used
under H.323 only and not under SIP.
SPP (Single-Port Protocol) is a non-standard protocol developed by MultiTech. SPP is not compatible with the “Proprietary” protocol used in MultiTech’s earlier generation of voip gateways. SPP offers advantages in certain
situations, especially when firewalls are used and when dynamic IP address
assignment is needed. However, when SPP is used, certain features of SIP and
H.323 will not be available and SPP will not inter-operate with voip systems
using H.323 or SIP.
Data Compression & Quality of Service. The MultiVOIP3010 comes
equipped with a variety of data compression capabilities, including G.723,
G.729, and G.711 and features DiffServ quality-of-service (QoS) capabilities.
VOIP Functions. The MultiVOIP MVP3010 gateway performs four basic
functions: (a) it converts a dialed number into an IP address, (b) it sends voice
over the data network, (c) it establishes a connection with another VOIP
gateway at a remote site, and (d) it receives voice over the data network. Voice
is handled as IP packets with a variety of compression options. Each E1
connection to the MultiVOIP provides 30 time-slot channels to connect to the
telco or to serve phone or fax stations connected to a PBX.
Ports. The MVP3010 also has a 10/100 Mbps Ethernet LAN interface, and a
Command port for configuration. An MVP3010 upgraded with the MVP30-60
kit will have two Ethernet LAN interfaces and two Command ports.
PSTN Failover Feature. The MultiVOIP can be programmed to divert calls
to the PSTN temporarily in case the IP network fails.
20
MultiVOIP User GuideOverview
Gatekeeper. E1 voip systems can have gatekeeper functionality either by
adding, as an endpoint, either a Multi-Tech standalone gatekeeper (special
software residing in separate hardware) or an analog gateway with embedded
gatekeeper functionality (MVP210G, MVP410G, or MVP810G). Gatekeepers
are optional but useful within voip systems. The gatekeeper acts as the
‘clearinghouse’ for all calls within its zone. MultiTech’s embedded and standalone gatekeeper software packages both perform all of the standard
gatekeepers functions (address translation, admission control, bandwidth
control, and zone management) and also support many valuable optional
functions (call control signaling, call authorization, bandwidth management,
and call management). The stand-alone gatekeeper is, however, slightly more
feature-rich than the embedded gatekeeper. For more details, see the
“Embedded Gatekeeper” chapter of this manual and the manual on
MultiTech’s stand-alone gatekeeper.
Management. Configuration and system management can be done locally
with the MultiVOIP configuration software. After an IP address has been
assigned locally, other configuration can be done remotely using the
MultiVOIP web browser GUI. Remote system management can be done with
the MultiVoipManager SNMP software or via the MultiVOIP web browser
GUI. All of these control software packages are included on the Product CD.
21
OverviewMultiVOIP User Guide
While the web GUI’s appearance differs slightly, its content and organization
are essentially the same as that of the Windows GUI (except for logging).
The primary advantage of the web GUI is remote access for control and
configuration. The controller PC and the MultiVOIP unit itself must both be
connected to the same IP network and their IP addresses must be known.
Once you’ve begun using the web browser GUI, you can go back to the
MultiVOIP Windows GUI at any time. However, you must log out of the web
browser GUI before using the MultiVOIP Windows GUI.
22
MultiVOIP User GuideOverview
Logging of System Events. MultiTech has built SysLog Server functionality
into the software of the MultiVOIP units. SysLog is a de facto standard for
logging events in network communication systems.
The SysLog Server resides in the MultiVOIP unit itself. To implement this
functionality, you will need a SysLog client program (sometimes referred to as
a “daemon”). SysLog client programs, both paid and freeware, can be obtained
from Kiwi Enterprises, among other firms. See www.kiwisyslog.com. SysLog
client programs essentially give you a means of structuring console messages
for convenience and ease of use.
MultiTech Systems does not endorse any particular SysLog client program.
SysLog client programs by any qualified provider should suffice for use with
MultiVOIP units. Kiwi’s brief description of their SysLog program indicates
the typical scope of such programs. “Kiwi Syslog Daemon is a freeware
Syslog Daemon for the Windows platform. It receives, logs, displays and
forwards Syslog messages from hosts such as routers, switches, Unix hosts and
any other syslog enabled device. There are many customizable options
available.”
23
OverviewMultiVOIP User Guide
Supplementary Telephony Services. The H.450 standard (an addition to
H.323) brings to voip telephony more of the premium features found in PSTN
and PBX telephony. MultiVOIP units offer five of these H.450 features: Call
Transfer, Call Hold, Call Waiting, Call Name Identification (not the same as
Caller ID), and Call Forwarding. (The first four features are found in the
“Supplementary Services” window; the fifth, Call Forwarding, appears in the
Add/Edit Inbound phonebook screen.) Note that the first three features are
closely related. All of these H.450 features are supported for H.323 operation
only; they are not supported for SIP or SPP.
E1 Front Panel LEDs
Because the MVP3010 and MVP30-60 both use a common main circuit card or
motherboard, the LED indicators are the same for both.
Figure 1-4. MultiVOIP MVP3010 Chassis
Active LEDs. The MVP3010 front panel has two sets of identical LEDs. In
the MVP3010 as shipped (that is, without an expansion card), the left-hand set
of LEDs is functional whereas the right-hand set is not.
When the MVP3010 has been upgraded with an MVP30-60 kit, the right-hand
set of LEDs will also become active.
24
MultiVOIP User GuideOverview
E1 LED Descriptions
MVP3010 Front Panel LED Definitions
LED NAMEDESCRIPTION
PowerIndicates presence of power.
Boot
RCVReceive. Lights when receiving data on Ethernet port.
XMTTransmit. Lights when transmitting data on Ethernet
LNKLink. When lit, VOIP “sees” the hub or network via
COLCollision. Lit when data collisions occur.
T1T1. Not supported.
E1E1. When lit, indicates presence of E1 connection.
PRIPRI. On if E1 line is of ISDN-Primary-Rate type.
ONLOnline. This LED is on when frame synchronization
ICIC LED is on when Internal Clocking is selected in
LCIndicates Loss of Carrier.
LSIndicates Loss of Signal.
TestFor testing purposes only. For testing purposes only.
After power up, the Boot LED will be on for about 10
seconds while the MVP3010 is booting.
port.
the Ethernet connection.
has been established on the T1/E1 link.
T1/E1 configuration.
25
OverviewMultiVOIP User Guide
Introduction to Analog MultiVOIPs
(MVP130, MVP-210/410/810 & MVP428)
VOIP: The Free Ride. We proudly present Multi-Tech's MVP130, MVP210/410/810 generation of MultiVOIP Voice-over-IP Gateways and models
MVP-210G/410G/810G equipped with embedded gatekeeper functionality .
All of these models allow voice/fax communication to be transmitted at no
additional expense over your existing IP network, which has ordinarily been
data only. To access this free voice and fax communication, you simply
connect the MultiVOIP to your telephone equipment and your existing Internet
connection. These analog MultiVOIPs inter-operate readily with T1 or E1
MultiVOIP units.
Capacity. MultiVOIP models MVP810 and MVP810G are eight-channel
units, models MVP410 and MVP410G are four-channel units, and models
MVP210 and MVP210G are two-channel units. The MVP130 is a singlechannel unit. All of these MultiVOIP units have a 10/100Mbps Ethernet
interface and a command port for configuration. The MVP428 is an expansion
circuit card for the four-channel MVP410 that turns it into an eight-channel
voip.
Mounting. Mechanically, the MVP410 and MVP810 MultiVOIPs are
designed for a one-high industry-standard EIA 19-inch rack enclosure. By
contrast, MVP130 and the MVP210 are tabletop units. The product must be
installed by qualified service personnel in a restricted-access area, in
accordance with Articles 110-16, 10-17, and 110-18 of the National Electrical
Code, ANSI/NFPA 70.
Phone System Transparency. These MultiVOIPs inter-operate with a
telephone switch or PBX, acting as a switching device that directs voice and
fax calls over an IP network. The MultiVOIPs have “phonebooks,” directories
that determine to who calls may be made and the sequences that must be used
to complete calls through the MultiVOIP. The phonebooks allow the phone
user to interact with the VOIP system just as they would with an ordinary PBX
or telco switch. When the phonebooks are set, special dialing sequences are
minimized or eliminated altogether. Once the call destination is determined,
the phonebook settings determine whether the destination VOIP unit must strip
off or add dialing digits to make the call appear at its destination to be a local
call.
H. 323, SIP, & SPP. Being H.323 compatible, the analog MultiVOIP unit can
place calls to telephone equipment at remote IP network locations that also
contain H.323 compatible voice-over-IP gateways. It will interface with H.323
software and H.323 gatekeeper units. H.323 specifications also bring to voip
telephony many special features common to conventional telephony. H.323
features of this kind that have been implemented into the MultiVOIP include
Call Hold, Call Waiting, Call Identification, Call Forwarding (from the H.450
26
MultiVOIP User GuideOverview
standard), and Call Transfer (H.450.2 from H.323 Version 2). The fourth
version of the H.323 standard improves system resource usage (esp. logical
port or socket usage) by handling call signaling more compactly and allowing
use of the low-overhead UDP protocol instead of the error-correcting TCP
protocol where possible.
The MultiVOIP is also SIP-compatible. (“SIP” means Session Initiation
Protocol.) However, H.450 Supplementary Services features can be used
under H.323 only and not under SIP.
SPP (Single-Port Protocol) is a non-standard protocol developed by MultiTech. SPP is not compatible with the “Proprietary” protocol used in MultiTech’s earlier generation of voip gateways. SPP offers advantages in certain
situations, especially when firewalls are used and when dynamic IP address
assignment is needed. However, when SPP is used, certain features of SIP and
H.323 will not be available and SPP will not inter-operate with voip systems
using H.323 or SIP.
Data Compression & Quality of Service. The analog MultiVOIP unit comes
equipped with a variety of data compression capabilities, including G.723,
G.729, and G.711 and features DiffServ quality-of-service (QoS) capabilities.
PSTN Failover Feature. The MultiVOIP can be programmed to divert calls
to the PSTN temporarily in case the IP network fails.
Gatekeepers. For voip systems built with MultiTech’s analog gateway units,
users can have either an embedded gatekeeper (built into an MVP210G,
MVP410G, or MVP810G) or a stand-alone gatekeeper (gatekeeper software
residing in separate hardware). Gatekeepers are optional but useful within voip
systems. The gatekeeper acts as the ‘clearinghouse’ for all calls within its
zone. MultiTech’s embedded and stand-alone gatekeeper software packages
both perform all of the standard gatekeepers functions (address translation,
admission control, bandwidth control, and zone management) and also support
many valuable optional functions (call control signaling, call authorization,
bandwidth management, and call management). The stand-alone gatekeeper is,
however, slightly more feature-rich than the embedded gatekeeper. For more
details, see the “Embedded Gatekeeper” chapter of this manual and the manual
on MultiTech’s stand-alone gatekeeper.
27
OverviewMultiVOIP User Guide
Management. Configuration and system management can be done locally
with the MultiVOIP configuration software. After an IP address has been
assigned locally, other configuration can be done remotely using the
MultiVOIP web browser GUI. Remote system management can be done with
the MultiVoipManager SNMP software or via the MultiVOIP web browser
GUI. All of these control software packages are included on the Product CD.
While the web GUI’s appearance differs slightly, its content and organization
are essentially the same as that of the Windows GUI (except for logging).
The primary advantage of the web GUI is remote access for control and
configuration. The controller PC and the MultiVOIP unit itself must both be
connected to the same IP network and their IP addresses must be known.
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MultiVOIP User GuideOverview
Once you’ve begun using the web browser GUI, you can go back to the
MultiVOIP Windows GUI at any time. However, you must log out of the web
browser GUI before using the MultiVOIP Windows GUI.
Logging of System Events. MultiTech has built SysLog Server functionality
into the software of the MultiVOIP units. SysLog is a de facto standard for
logging events in network communication systems.
The SysLog Server resides in the MultiVOIP unit itself. To implement this
functionality, you will need a SysLog client program (sometimes referred to as
a “daemon”). SysLog client programs, both paid and freeware, can be obtained
from Kiwi Enterprises, among other firms. See www.kiwisyslog.com. SysLog
client programs essentially give you a means of structuring console messages
for convenience and ease of use.
MultiTech Systems does not endorse any particular SysLog client program.
SysLog client programs by any qualified provider should suffice for use with
MultiVOIP units. Kiwi’s brief description of their SysLog program indicates
the typical scope of such programs. “Kiwi Syslog Daemon is a freeware
Syslog Daemon for the Windows platform. It receives, logs, displays and
forwards Syslog messages from hosts such as routers, switches, Unix hosts and
any other syslog enabled device. There are many customizable options
available.”
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OverviewMultiVOIP User Guide
Supplementary Telephony Services. The H.450 standard (an addition to
H.323) brings to voip telephony more of the premium features found in PSTN
and PBX telephony. MultiVOIP units offer five of these H.450 features: Call
Transfer, Call Hold, Call Waiting, Call Name Identification (not the same as
Caller ID), and Call Forwarding. (The first four features are found in the
“Supplementary Services” window; the fifth, Call Forwarding, appears in the
Add/Edit Inbound phonebook screen.) Note that the first three features are
closely related. All of these H.450 features are supported for H.323 operation
only; they are not supported for SIP or SPP.