Multitech Multivoip 100 Model Mvp120 Voice/fax Over Ip Networks User Guide

							Multi-Tech Systems, Inc. MultiVOIP User GuideChapter 4 - Configuring the Master MultiVOIP
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Building a Proprietary Phonebook Directory
Note:  This section starts at Step 27 as it is a continuation from Step 26 on pages 27-28.
27. To build your proprietary MVP120 Phone Directory (in an H.323 environment without the
Gatekeeper option enabled), you will first need to select the Proprietary Phonebook
option and then configure the “Master” MVP120 and then the “Slave” MVP120s (or other
H.323 endpoints). Configuring the “Slave” MVP120 is discussed later in this chapter.
The MultiVOIP configured as Master contain the proprietary phonebook database. All
ohter MultiVOIPs added to the proprietary phonebook database are designated Slaves.
The master database contains the phone numbers of all H.323 endpoints available for
communication on an IP network. This database is downloaded to each Slave MultiVOIP
as it comes online.
28. To configure the “Master” MVP120, make certain that the Proprietary Phonebook and
Master options are enabled. The Slave option, Master IP Address, and Send Status
Report to Master will be disabled. The Slave Status button displays the Slave VOIP
Status dialog box used for viewing phone number, IP address, status, and description of
slave units (See “Configuring Your Slave MVP120s” for details). Note: In the Q.931
Parameters group, Use Fast Start is checked for compatibility with other H.323 devices
that support Fast Start Capability.
Click Add to begin building your phone directory database. The Add/Edit Phone Entry
dialog box displays. 
						

							Multi-Tech Systems, Inc. MultiVOIP User GuideChapter 4 - Configuring the Master MultiVOIP
32 29. Enter a unique phone number for the local VOIP in the Phone Number box and enter 1 for
the Voice/Fax channel in the Voice Channel box. This number must be 1 for each MVP120.
Note: MVP120 and MVP110 will only have one entry and will be Channel 1.
30. The Description box is optional, but can be useful in associating the channel to the
extension. If you wish, enter a description of your local phone number. This description
serves to identify the phone number you entered in the previous step.  Normally the “Master”
MVP120 resides at the entity’s main office; therefore, for this example you could enter a
description such as “New York Office”).
31. The Station Identification group includes a Hunt Group list. This list enables you to
indicate which Hunt Group you want the phone number to be associated with; or, you can
select NO HUNT if you don’t want this entry to participate in hunting. Hunting is a series of
telephone lines organized in such a way that if the first line is busy the next line is hunted and
so on until a free line is found. For this example, assign the phone entry to HUNT GROUP
#1.
Once you have assigned this entry to a Hunt Group (or NO HUNT), you must enter the IP
Address of the Master MVP120 in the IP Address box.
Note: The Port box becomes active as you begin to enter the IP Address. The entry is the
H.323 industry standard Port value (1720) used to communicate with other H.323 endpoints.
32. Click OK to return to the Phone Directory Database dialog box. It now includes phone
number, destination details, and description. 
						

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33. Add all other phone numbers (slave units and standalone units) to the Phone Directory
database. To add a channel of a slave MultiVOIP, click Add and the Add/Edit Phone Entry
dialog box displays.
34. Enter the phone number for the MultiVOIP in the Station Information group Phone Number
box.
35. Click inside the Description box and enter a description for the remote MultiVOIP phone
number for the Voice/Fax Channel.
36. In the Station Identification group, select HUNT GROUP #2 from the Hunt Group list, enter
the London Office’s IP Address (202.056.039.100), and accept the H.323 industry standard
Port value (1720) used to communicate with other H.323 endpoints.
37. Click OK and you are returned to the Phone Directory Database dialog box which now
includes the second number and related information in the Phone Number list. 
						

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38. To configure a stand-alone endpoint (a PC with NetMeeting software), click Add and the
Add/Edit Phone Entry dialog box displays again.
39. Enter the phone number for the  stand-alone endpoint in the Station Information group
Phone Number box.  For example, 301.
40. Click inside the Description box and enter a description for the remote stand-alone phone
number. For example, “Human Resources Desk”.
Note: Because the H.323 endpoint is not a MVP120, the Phone Directory database ignores
the Voice Channel entry.  Set the Channel to 1.
41. In the Station Identification group, select NO HUNT from the Hunt Group list,  enter the
Human Resource Desk’s IP Address and accept the H.323 industry standard Port value
(1720) used to communicate with other H.323 endpoints.
Note: This stand-alone was not configured as part of a Hunt Group. However, depending on
your requirements, you could configure a stand-alone to be part of a Hunt Group.
42. Click OK and you are returned to the Phone Directory Database dialog box which now
includes the stand-alone phone number and related information in the Phone Number list. 
						

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43. When you have finished, click OK to download the setup configuration to the
MVP120.
44. Click OK.  After the setup is written to the MVP120, the unit reboots.
45. Verify that the BOOT LED on the MVP120 is off after the download is complete. This
may take several minutes as the MVP120 reboots.
At this time your master MVP120 is configured. Proceed to the “Configuring Your
Slave MVP120s” section. 
						

							


	


Chapter 5
Configuring the Slave MultiVOIPs 
						

							37 Chapter 5 - Configuring the Slave MultiVOIPs
Multi-Tech Systems, Inc. MultiVOIP User Guide
Chapter 5 - Configuring the Slave MultiVOIPs
If the Proprietary Phonebook option on the Phone Directory Database dialog box was
enabled, then you will need to configure all remote H.323 endpoints as “Slave” units. For
example, the MVP120 at the company’s subsidiary office in London would need to be
configured as a “Slave.”
CAUTION: If you are installing a MVP120 behind a Firewall, the Firewall must support H.323.
Refer to your Firewall user documentation to enable H.323 support.
1. Disconnect the PC from the Command port of the Master MVP120 and connect it to
the Command port on the Slave MVP120.
2. From your desktop, click Programs I MultiVOIP 100 I MultiVOIP Configuration. The
Main menu displays.
3. Click IP to display the IP Setup dialog box.
Select the Enable Diffserv box if you have routers that support Diffserv (sometimes
called IP Precedence). This feature gives priority to voice packets so they are not
delayed because of large data files being downloaded.
The default Frame Type is TYPE_II. If this does not match your IP network, select the
Frame Type from the Frame Type list. The Frame Type choices are TYPE_II and
SNAP. 
						

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Multi-Tech Systems, Inc. MultiVOIP User Guide4. In the Port Address group, enter the IP Address and IP Mask. In the Gateway Address
group, enter the gateway IP address for the slave unit.
The IP Address is the unique IP address that you assign to the MVP120, and the Gateway
Address is the IP address of the device (such as a network router) connected to the Internet/
Intranet.
Click OK when you are finished. The Main menu displays.
5. From the Main menu, click Voice Channels to display the Channel Setup dialog box. The
Channel Setup dialog box displays. The four tabs in this dialog box define the channel
interface, voice/fax parameters, Billing/Misc parameters, and regional telephone parameters
for the channel.
Check with your in-house telephone personnel to verify whether your local PBX dial signaling
is Pulse or DTMF (tone). Select the Regeneration option accordingly.
The Inter Digit Time option defines the maximum amount of time that the unit will wait before
mapping the dialed digits to an entry in the Phone Directory Database. If too much time
elapses between digits, and the wrong numbers are mapped, you will hear a rapid busy
signal. If this happens, it will be necessary to hang up and dial again. The default is 2
seconds. In the Flash Timer box, enter the time, in milliseconds, for the duration of flash
hook signals output on the interface.
The Message Waiting Light check box must be selected on the originating and answering
voice channel. This enables the number dialed to connect you to the appropriate voice
channel, then output that number on the voice channel. This feature does not work FXS to
FXS.
6. The Ring Count FXO box enables you to set the maximum number of rings output on the
FXO interface before hanging up and releasing the line to another call. The default setting is
2 rings.
Note: Zero (0) means no incoming calls will be answered.
For FXO-to-FXO communications, you can enable a specific kind of FXO Disconnect
Options: Current Loss, Tone Detection, or Silence Detection.  Check with your in-house
phone personnel to verify the type of disconnect to use. If current loss is checked, the VOIP
will hang up when it detects a loss of current on the FXO (phone) port. For tone detection,
select from the lists one or two tones that will cause the line to disconnect. The person
hanging up the call must then press the key or keys that produce those tones to hang up a
call.  For silence detection, select One Way or Two Way, then set the timer for the number
of seconds of silence before disconnect. The default value of 15 seconds may be shorter
than desired for your application. 
						

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Multi-Tech Systems, Inc. MultiVOIP User Guide7. The Voice/Fax tab displays the parameters for the voice gain, DTMF (Dual Tone Multi-
Frequency) gain, voice coder, faxing, and advanced features such as Silence Compression,
Echo Cancellation, and Forward Error Correction.
8. Input gain modifies the level of the audio coming in to the voice channel before it is sent over
the Internet to the remote MVP120.  Output gain modifies the level of the audio being output
to the device attached to the voice channel. Make your selections from the Input and Output
lists. The valid range  is +31dB to –31dB with a recommended/default value of 0.
You can also set up the DTMF Gain (or output level in decibels - dB) for the higher and lower
frequency groups of the DTMF tone pair.  Make your selections in the lists in the DTMF Gain
group.
The DTMF Out of Band check box is selected so the MVP120 will reproduce the DTMF
tones rather than passing them through with voice. When this option is checked the DTMF is
sent via RTP packets.
Note: Only change the DTMF Gain under direction os Multi-Tech Technical Support.
9. To change the voice coder, select the Manual in the Coder group. Select the appropriate
coder from the Selected Coder list.
If you changed the voice coder, ensure that the same voice coder is used on the voice/fax
channel you are calling.  Otherwise, you will always get a busy signal.
10. The Fax group enables you to send/receive faxes. You can set the maximum baud rate for
faxes and the fax volume in the two lists and change the jitter value in milliseconds.
When receiving fax packets from a remote MVP120, it is possible for individual packets to be
delayed or received out of order due to traffic conditions on the network. To compensate for
this effect, the MVP120 uses a Jitter Buffer. The Jitter Value box allows the MVP120 to wait
a user-definable period of time, in milliseconds, for delayed or out of order fax packets. The
range of allowable Jitter Values is 0 to 400 with a default of 400 milliseconds.
If you do not plan to send or receive faxes on a given voice/fax channel, you can disable
faxes in the Fax group. 
						

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Multi-Tech Systems, Inc. MultiVOIP User Guide11. You can enable the voice/fax advanced features by clicking (checking) the silence
compression, echo cancellation, or forward error correction options.
Silence Compression - Defines whether silence compression is enabled for the voice
channel. If silence compression is enabled, the MVP120 will not transmit voice packets when
silence is detected, thereby reducing the amount of network bandwidth that is being used by
the voice channel.
Echo Cancellation - Defines whether echo cancellation is enabled for this voice channel. If
echo cancellation is enabled, the MVP120 will remove echo-delay which improves the quality
of sound.
Forward Error Correction (FEC) - Defines whether forward error correction is enabled
(checked) for this voice channel. The FEC feature allows some of the voice packets that
were corrupted (or lost) to be recovered. FEC adds an additional 50% overhead to the total
network bandwidth consumed by the voice channel.
The Billing/Misc tab displays the parameters for auto call, automatic disconnection, billing
options and dynamic jitter buffer.
12. If you want to dedicate a local voice/fax channel to a remote voice/fax channel (so you will
not have to dial the remote channel), click the Auto Call Enable option in the Auto Call
group. Then enter the phone number of the remote MVP120 in the Phone Number box.
13. The Automatic Disconnection group provides three options to be used singly or in
combination.
The Jitter Value defines the average inter-arrival packet deviation (in milliseconds) before
the call is automatically disconnected. Jitter is the inter-arrival packet deviation (phase shift of
digital pulses) over the transmission medium that causes voice breakup which can be
particularly disruptive to voice communications. The default setting is 20 milliseconds. A
higher value means that the voice transmission will be more accepting of jitter. A lower value
will be less tolerant of jitter.
Consecutive Packets Lost defines the number of consecutive packets that are lost after
which the call is automatically disconnected. The default setting is 30 packets.