Multi-Tech Systems Mvp400, Mvp800 Voice/fax Over Ip Networks User Guide

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With Gatekeeper Enabled
Enabling the Gatekeeper option on the Phone Directory Database dialog box means that the
Gatekeeper acts as the central point for all calls within its zone and provides call control services to
registered endpoints. The Gatekeeper performs address translation from LAN aliases  to IP
addresses and provides bandwidth management where the network manager has specified a
threshold for the number of simultaneous conferences on the LAN.
Adding and/or editing entries in the H.323 Gatekeeper database must be done from the Add/Edit
Phone Entry dialog box. Deleting entries is done by highlighting the entry to be deleted in the Phone
Directory Database dialog box and clicking the Delete button.
To change a parameter of an existing entry already registered with the Gatekeeper database,
highlight the entry currently listed in the Phone Directory Database dialog box and click the Edit
button. The Add/Edit Phone Entry dialog box is displayed with the current information.
If you simply want to change the Description field (e.g., John no longer works at the company and
you want to change the name to “Bob’s Desk”), enter the new description and click OK. The update
will be made automatically to the Gatekeeper database. However, if you need to change any of the
other parameters in the Add/Edit Phone Entry dialog box, you will need to consult with the
Gatekeeper administrator. Contact the Gatekeeper administrator (e.g., by phone or e-mail) and
determine together that any changes to the phone entry’s parameters will not create duplication.
When consulting with the Gatekeeper administrator, note that the Station Information group phone
number does not have to be a conventional phone number. For example, it does not have to be 717-
5565. It can be a single digit or several digits. You could enter a phone number of 101 with a
description of New York Office 1 and assign it to channel 1.
Note: The phone number must not conflict with other endpoints.
When consulting with the Gatekeeper administrator, note that the Station Identification group H323
ID  is a unique identifier that  represents the name of the gateway with the name of the Gatekeeper
appended to the end (e.g., [email protected]). 1720 is the H.323 industry standard Port number of
all H.323 endpoints.The IP Address field is for the IP Address of the New York 1 endpoint and is an
optional (redundant) entry.
Note: The Port field is enabled (activated) only when the IP Address of the H.323 endpoint is
entered.
When you enter this information and click OK, the information is updated automatically at the
Gatekeeper database.   
						

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Changing IP Parameters
The IP Setup dialog box establishes the IP addressing for the local Ethernet LAN and defines the
Internet gateway address. The IP Setup dialog box is accessed by clicking the IP button on the
MultiVOIP 800 Setup menu.
With IP Setup dialog box displayed you can change the status of differential services, the Ethernet
Frame Type, the IP address and IP Mask of your H.323 endpoint, and the Gateway Address of the IP
address of the device connected to the Internet.
Clicking (checking) the Enable Diffserv box enables Differentiated Services (default is disabled).
Differentiated Services provides priority to voice packets so that they are not delayed whenever large
data files need to be downloaded. You will need to check with your systems administrator to
determine if any routers in the VOIP network support this feature. If the answer is yes, then you
would want to enable this function.
The Frame Type drop-down list enables you to change the Ethernet Frame Type so that it matches
your IP network.  If the current entry does not match your IP network, change the Frame Type by
clicking the drop-down arrow. The Frame Type choices are TYPE_II and SNAP.
The Port Address group enables you to change the unique IP Address and IP Mask of the local
LAN.
The Gateway Address group enables you to change the gateway IP Address of the device
connected to the Internet/Intranet.   
						

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Viewing Call Progress
The Call Progress dialog box is a read-only screen that displays the status of a call in progress. This
dialog box is accessed from the MultiVOIP 800 Setup menu by clicking the Call Progress button.
The ratio of Packets Lost versus Packets Received provides a general indication of the integrity of
the Internet connection. To reduce the frequency of lost packets, select a low-bit-rate coder, such as,
G.723 or Netcoder. In addition, enabling the Forward Error Correction option on the Voice/Fax tab on
the Channel Setup dialog box will enable the MultiVOIP 400/800 to recover many of the lost packets.
The Jitter value (measured in milliseconds) indicates the mean deviation of the difference in packet
spacing at the receiver compared to the sender for a pair of packets.   
						

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Applications Setup
Clicking the Others button on the Setup menu displays the Applications Setup dialog box. This
dialog box allows you to enable SNMP Agent (the default is disabled) and set up all the necessary
parameters; enable or disable various remote configuration methods such as TFTP (Trivial File
Transfer Protocol) Server, Web Server, Dumb Terminal Management, and Telnet Server; and assign
a Password to the MultiVOIP 400/800 for Internet security. These remote configuration applications
enable remote viewing and changing of the MultiVOIP 400/800 configuration, or updating firmware,
from anywhere on the connected internetwork.
Verify that the desired applications are enabled (checked). All applications are checked (enabled) as
the default condition. To disable a given application, click to uncheck the check box and disable
support.
SNMP related operations can be performed only when the SNMP Agent is enabled (checked) on this
dialog box. The IP address of the system (i.e., SNMP Manager) that will receive the Traps from the
MultiVOIP 400/800 should be entered in the IP Address field in the Trap Manager group. The
Community Name of the SNMP Manager receiving the Traps can be a maximum of 19 characters
and is case sensitive. The default Port Number of the SNMP Manager receiving the Traps is 162.
The MultiVOIP 400/800 currently supports a maximum of two community users at a time, and they
can be assigned either Read/Write or Read Only rights.
The Password group enables you to enter a password, up to 13 alphanumeric characters, to be
used for Internet Security. Once the password is entered (in the MultiVOIP Password field) and
confirmed (in the Confirm Password field), remote users will be queried to enter the password
before gaining access to the MultiVOIP 400/800 for configuration purposes.
Note: If you forget your password, contact Multi-Tech Technical Support for instructions.
For more information on using these applications, click the on-line Help button or refer to Chapter 5,
Remote Configuration and Management.   
						

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Viewing Statistics
The Statistics dialog box enables you to view statistics for major events of the MultiVOIP 400/800
operation. This dialog box is accessed by clicking the Statistics button on the MultiVOIP 800 Setup
menu.
Statistics can be a helpful troubleshooting tool. For example, viewing the Voice Channel statistics you
can see the attempted and completed calls, call duration, average call length, bytes/packets sent and
received, etc.
IP Statistics
IP is a connection-less network protocol residing in the network layer of a conventional OSI layered
model (for more information on this model, refer to Appendix A). Depending on what is going on at the
application layer, IP will typically use one of two transport layer protocols. User Datagram Protocol
(UDP), a connection-less transport layer protocol used with TFTP or SNMP; and Transport Control
Protocol (TCP), a connection-oriented transport layer protocol used with FTP, Telnet, and SNMP.
UDP makes use of the port concept and has no measures for flow control, reliability, or error recovery.
It is used when the full services of TCP are not required, and the reliability measures must be
assumed by another layer.
TCP works well in environments where the reliability measures are not assumed by other layers. It is
connection-oriented and has a full range of services.     
						

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For the most part, these statistics are informational, and their use as a troubleshooting tool will be
contingent on the applications running in the upper layers. For example, if you were having problems
connecting to the MultiVOIP 400/800’s web server, you would look under the TCP section to see if
any connections are being established.  If not, that may indicate the web server is not enabled.  Or, if
you were having problems establishing a remote connection through TFTP, you could look in the
UDP section to see if any packets are being received.  If not, you may need to review your network
addressing.
SNMP Statistics
The SNMP Statistics dialog box provides statistical information on Simple Network Management
Protocol (SNMP).
SNMP is an application layer protocol that facilitates the exchange of management information
between network devices.  There are three key components in SNMP: (1) the devices that are to be
managed, (2) agents, and (3) the network management systems.  The managed device is the
network device, like a router.  The agent is the software module residing in the managed device
pertaining to network management.  The network management system runs the SNMP application
that controls the managed devices and monitors their status.  Four primary operations -- Set, Get,
Get Next, and Trap -- are performed using SNMP.   
						

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Viewing Logs
The Log Entries dialog box displays a chronological history of all calls into and out of this unit. This
dialog box is accessed from the Logs button on the Statistics dialog box.
The Log Entries dialog box displays each call as a sequentially numbered Event with the date, time,
duration of the call, the status of the call (Successful or Unsuccessful), Mode (Voice  or Fax), and the
from and to numbers.
Viewing Log Entry Details
The Log Entry Details dialog box displays the status of a completed call.  This dialog box displays
the same details as the Call Progress dialog box after a call is completed.     
						

							68 MultiVOIP 400/800 User Guide
Viewing Channel Totals
The Channel Totals dialog box displays Outgoing and Incoming calls with their Attempted and
Completed numbers for each channel on this MultiVOIP 400/800.  The Total Connected Time for the
channel is also displayed.  This can provide you with a sense of successful call completions on each
channel of the unit.
Reports
A report of the contents of the Log Entries dialog box can be generated using the Windows Notepad
accessory and then printed from your local PC.  The report is generated by entering the To and From
dates in the Report Generation dialog box and then clicking the Generate button. This function
provides a hard copy of the Log Entries dialog box.     
						

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Upgrade Procedures
Whenever you upgrade your version of the MultiVOIP 400/800 software, you must first install the new
software on your PC. Then, download the Firmware, the Factory Defaults, the Voice Coders, and/or
the H.323 stack  to upgrade the MultiVOIP 400/800 itself.
Before starting the upgrade process, view the current configuration and write down important data
such as your IP address, and voice channel configurations; these settings must be put back in place
after the software has been upgraded.  Multi-Tech also recommends that you use the Print button on
the Phone Directory Database dialog box to have a copy of the phone directory contents.
Three utility programs included in the MultiVOIP 400/800 software are to be used only after the unit
has been repaired or upgraded. They are Download Firmware, Download Voice Coders, and
Download H.323 Stack.
Download Firmware
 If you have obtained a new firmware version from the Multi-Tech Web site, the Multi-Tech FTP site,
or another source, do the following:
Win3.1 users - In the Program Manager, double-click the Download Firmware icon in the
MultiVOIP 400/800 program group. The Open dialog box appears displaying the file list containing a
single file, mtvoip.bin.
Win2000/NT/98/95 users - Click Programs | MultiVOIP 800 | Download Firmware. The Open
dialog box appears displaying the file list containing a single file, mtvoip.bin.
After you select the mtvoip.bin file and click OK, the Downloading Code dialog box is displayed with
a progress bar so you can monitor the download process.
After the new firmware file is downloaded to the MultiVOIP 400/800, the unit reboots and is then
ready for use with upgraded firmware.     
						

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Download Coders
 If you have obtained a new coders file, do the following:
Win3.1 users - In the Program Manager, double-click the Download Coders icon in the MultiVOIP
400/800 program group. The Open dialog box appears displaying the file list containing a single file,
coders.hst.
Win2000/NT/98/95 users - Click Programs | MultiVOIP 800 | Download Coders. The Open dialog
box appears displaying the file list containing a single file, coders.hst.
After you select the coders.hst file and click OK, the Downloading Voice Coder dialog box is
displayed with a progress bar so you can monitor the download process.
After the file is downloaded to the MultiVOIP 400/800, the unit reboots and is then ready for use with
upgraded voice coders.