Multi-Tech Systems Multivoip Model Mvp400/800 Standalone Voice/ip Gateway Quick Start Guide

							51 Configuring  the MultiVOIP
9. You can set up the input and output voice gain so that the
volume can be increased or decreased. Input gain
modifies the level of the audio coming in to the voice
channel before it is sent over the Internet to the remote
MultiVOIP 400/800.  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 in the Voice Gain group. The valid range is +31dB to
–31dB with a recommended default value of 0.
The DTMF Gain group controls the volume level of the
digital tones sent out for touchtone dialing.  The selections
from the Gain High and Gain Low lists control the gain in
decibels of the high and low tones in the tone pairs.  The
default gain values are -4 dB and -7 dB respectively.  The
DTMF gain should be changed only with the assistance of
Multi-Tech Technical Support.
When the DTMF Out of Band check box is selected, the
MultiVOIP reproduces DTMF tones rather than passing
them from input to output. 
						

							MultiVOIP Quick Start Guide
5210. To change the voice coder, the channel from the Select
Channel list, then click Manual in the Coder group. To
select the appropriate coder, select your new voice coder
entry 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.
Note: If you allow the Coder to be selected automatically,
enter the Max Bandwidth. Check with your network
administrator to determine how much bandwidth is
available.
11. The Fax group enables you to send/receive faxes on the
selected voice/fax channel. You can set the maximum
baud rate for faxes and the fax volume in the two drop-
down lists and change the jitter value in milliseconds.
When receiving fax packets from a remote MultiVOIP 400/
800, 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 MultiVOIP 400/
800 uses a Jitter Buffer. The Jitter Value allows the
MultiVOIP 400/800 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
milliseconds 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.
12. You can enable the voice/fax advanced features by
selecting the Silence Compression, Echo Cancellation,
or Forward Error Correction check boxes.
The Silence Compression check box defines whether
silence compression is enabled for this voice channel. If
silence compression is enabled, the MultiVOIP 400/800
will not transmit voice packets when silence is detected,
thereby reducing the amount of network bandwidth that is
being used by the voice channel. 
						

							53 Configuring  the MultiVOIP
The Echo Cancellation check box defines whether echo
cancellation is enabled for this voice channel. If echo
cancellation is enabled, the MultiVOIP 400/800 will remove
echo-delay which improves the quality of sound.
The Forward Error Correction (FEC) check box defines
whether forward error correction is enabled 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.
Note: After configuring a given channel, you can copy that
channel’s configuration by clicking Copy Options.
Everything on the Voice/Fax tab will be copied to the other
channel.
The Billing/Misc tab displays the parameters for auto call,
automatic disconnection, billing options and dynamic jitter
buffer.
13. 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 check box in 
						

							MultiVOIP Quick Start Guide
54the Auto Call group. Then enter the phone number of the
remote MultiVOIP 400/800 in the Phone Number box.
14. 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.
Call Duration defines the maximum length of time (in
seconds) that a call remains connected before the call is
automatically disconnected. The default setting is 180
seconds.  A call limit of three minutes may be too short for
most configurations. Therefore, you may want to increase
this default value.
15. You can set billing options for inbound and outbound calls
by selecting them in the Billing Options group and then
entering the charge in cents per number of seconds.
16. A minimum and maximum set of values can be set for
Dynamic Jitter Buffer. When receiving voice packets
from a remote MultiVOIP 400/800, it is possible to
experience varying delays between packets due to traffic
conditions on the network. This is called Jitter. To
compensate for this effect, the MultiVOIP 400/800 uses a
Dynamic Jitter Buffer. The Jitter Buffer allows the
MultiVOIP 400/800 to wait for delayed voice packets by
automatically adjusting the length of the Jitter Buffer 
						

							55 Configuring  the MultiVOIP
between allowable minimum and maximum values. An
Optimization Factor adjustment controls how quickly the
length of the Jitter Buffer is increased when jitter increases
on the network. The length of the jitter buffer directly
effects the voice delay between MultiVOIP 400/800
gateways.
The Minimum Jitter Value default setting is 150
milliseconds, the Maximum Jitter Value default setting is
300 milliseconds, and the Optimization Factor default
setting is 7.
Note: After configuring a given channel, you can copy that
channel’s configuration to the other channel by clicking
Copy Options. Everything on the Billing/Misc tab will be
copied to the other channel.
If your country/region is not the default USA, click the
Regional tab and proceed to step 17.  Otherwise, proceed
to step 18 to begin building your phone directory database. 
						

							MultiVOIP Quick Start Guide
5617. To change the Tone Pairs on the Regional tab, select your
specific country or region from the Country/Region list.
Note: If your country or region is not listed, click Custom
to define it.
The Tone Pairs group enables you to select/modify the
parameters according to choice.  Click OK when finished
and proceed to step 6 to begin building your phone
directory database.
18. From the Main menu, click Phone Book to display the
Phone Directory Database dialog box. Make certain the
Proprietary Phonebook option is selected.  In the
Database Type group, select the Slave option. The
Master IP Address box becomes active. 
						

							57 Configuring  the MultiVOIP
Note: After you have enabled the Slave option, the Slave
Status button is replaced by the Update button. Once
your Phone Directory database has been established, you
can click Update to refresh the entries in the Phone
Directory Database window.
19. Enter the IP address (204.022.122.118) of the Master
MultiVOIP 400/800 in the Master IP Address box and
select the Send Status Report to Master check box.
This established the New York office MultiVOIP 400/800
as the Master.
Note:  In a Dial-On-Demand (DOD) network, you should
leave the Send Status Report to Master check box
cleared. This allows the router to disconnect whenever
there is no voice activity. Note that Slaves with the Send
Status Report to Master check box cleared will show up
as “Unknown” when viewing Slave status on the Master.
20. Click OK to return to the Main menu.
21. Click Download Setup to write the new configuration to
the slave unit. The Save Setup dialog box displays. 
						

							MultiVOIP Quick Start Guide
58
22. Select  the Save Current Setup as User Default
Configuration and click OK. The Writing Setup dialog box
displays as the setup configuration is written to the
MultiVOIP 400/800.
After the setup is written to the MultiVOIP 400/800, it
reboots.
23. Check that the BTG LED on the MultiVOIP 400/800 is off
after the download is complete. This may take several
minutes as the MultiVOIP 400/800 reboots.
24. You are returned to the Main menu.
Your MultiVOIP 400/800 is operational at this time.
Repeat the process for each of the slave units. When all
slaves have been configured, go to the “Deploying the
Network” section. 
						

							59 Deploying  the VOIP Network
Deploying the VOIP Network
For a proprietary phone directory database, the VOIP
administrator can deploy the pre-configured slave MultiVOIP
400/800s to their remote sites. The remote site administrators
need only connect power to the pre-configured MultiVOIP 400/
800, connect the MultiVOIP 400/800 to their Ethernet LAN and
predefined telephone equipment, and then wait for the phone
directory database to be downloaded.
With the Gatekeeper option enabled on the Phone Directory
Database dialog box, all MultiVOIP 400/800s are configured
as “Master” and cannot be downloaded. In this case, each
MultiVOIP 400/800 Phone Book will be programmed with
phone numbers for its own channels. These phone numbers
are remotely registered with the H.323 Gatekeeper.  See the
“Registering with a Gatekeeper Phone Directory” section for
more information.
Remote Site Administrator
The following steps are for MultiVOIP 400/800 H.323
endpoints. For non-MultiVOIP 400/800 H.323 endpoints, refer
to the appropriate installation documentation.
1. Unpack your MultiVOIP 400/800.
2. Connect one end of the power supply to a live AC outlet
and connect the other end to the Power connection on
your MultiVOIP 400/800 (See Figure 5). 
						

							MultiVOIP Quick Start Guide
60
FXSE&M
FXO
PSTNEthernet Connection
Power Connection
10BASET
ETHERNET
POWER
Voice/Fax Channel
      Connections
E&MFXO
FXS
Figure 5.  Remote Site Cable Connection
3. Connect a network cable to the ETHERNET 10BASET
(RJ-45) connector on the back of your MultiVOIP 400/800.
4. If you are connecting a station device (analog telephone,
fax machine, or Key Telephone System (KTS) to your
MultiVOIP 400/800, connect the smaller end of a special
adapter cable (supplied) to the Voice/Fax Channel 1 FXS
connector on the back of the MultiVOIP 400/800 and the
other end to the station device.
If you are connecting a PBX extension to your MultiVOIP
400/800, connect the smaller end of a special adapter
cable (supplied) to the Voice/Fax Channel 1 FXO
connector on the back of the MultiVOIP 400/800 and the
other end to the PBX extension.
If you are connecting an E&M trunk from a telephone
switch to your MultiVOIP 400/800, connect one end of an
RJ-45 phone cord to the Voice/Fax Channel 1 E&M
connector on the back of the unit and the other end to the
trunk phone jack.
If you are connecting to an E&M trunk, you need to ensure
that the E&M trunk jumper is in the correct position for the
E&M type trunk. The default E&M jumper position is E&M
type 2. To change the E&M jumper position, perform the
E&M jumper block positioning procedure.