Multi-Tech Systems Mvp-2400/2410/3010, Mvp-210/410/810 Voice/ip Gateways User Guide

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The table below describes all fields in the PhoneBook Configuration
screen.
PhoneBook Configuration Parameter Definitions
Field Name Values Description
Gateway
NameY/N This field allows you to specify
a name for this MultiVOIP.
When placing a call, this name
is sent to the remote
MultiVOIP for display in Call
Progress listings, Logs, etc.
Q.931 Parameters
Use Fast Start Y/N Enables the H.323 Fast Start
procedure.  May need to be
enabled/disabled for
compatibility with third-party
VOIP gateways.
Call Signalling
Portport
numberDefault: 1720 (H.323)
GateKeeper RAS Parameters
IP AddressIP address of the GateKeeper.
Port Number Well-known port number for
GateKeepers.
Must match port number of
GateKeeper, 1719.
Gateway
PrefixThis number becomes
registered with the
GateKeeper.  Call requests sent
to the gatekeeper and
preceded by this prefix will be
routed to the VOIP gateway.
Gatekeeper
Namealpha-
numeric
stringOptional.  The name of the
GateKeeper with which this
MultiVOIP is trying to register.
H.323 ID The H.323 ID is used to
register this particular
MultiVOIP with the
GateKeeper. 
						

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PhoneBook Configuration Parameter Definitions
(cont’d)
Field Name Values Description
Proxy Server Parameters
Enable Proxy Y/N Allows the MultiVOIP to work
in conjunction with a proxy
server.
Proxy Server
IP Addressn.n.n.n
where
n=0-255Network address of the proxy
server that the voip is using.
Port Number Logical port number for proxy
communications.
H.323 Version 4 Parameters
Q.931
Multiplexing
(Mux)Y/N Signalling for multiple phone
calls can be carried on a single
port rather than opening a
separate signalling port for
each call.  This conserves
bandwidth resources.
H.245
Tunneling
(Tun)Y/N H.245 messages are
encapsulated within the  Q.931
call signalling channel.
Among other things, the H.245
messages let the two endpoints
tell each other what their
technical capabilities are and
determine who, during the
call, will be the client and who
the server. Tunneling is the
process of transmitting these
H.245 messages through the
Q.931 channel. The same
TCP/IP socket (or logical port)
already being used for the Call
Signalling Channel is  then also
used by the H.245 Control
Channel.  This encapsulation
reduces the number of logical
ports (sockets) needed and
reduces call setup time. 
						

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PhoneBook Configuration Parameter Definitions
(cont’d)
Field Name Values Description
H.323 Version 4 Parameters
Parallel H.245
(FS + Tun)Y/NFS (Fast Start or Fast Connect)
is a Q.931 feature of H.323v2 to
hasten call setup as well as
‘pre-opening’ the media
channel before the CONNECT
message is sent.  This pre-
opening is a requirement for
certain billing activities.
Under Parallel H.245 FS + Tun,
this Fast Connect feature can
operate simultaneously with
H.245 Tunneling (see
description above).
Annex –E (AE) Y/NMultiplexed UDP call
signalling transport.  Annex E
is helpful for high-volume voip
system endpoints.  Gateways
with lesser volume can afford
to use TCP to establish calls.
However, for larger volume
endpoints, the call setup times
and system resource usage
under TCP can become
problematic.  Annex E allows
endpoints to perform call
signalling functions under the
UDP protocol, which involves
substantially streamlined
overhead.  (This feature should
not be used on the public
Internet because of potential
problems with security and
bandwidth usage.) 
						

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2. Select PhoneBook Modify and then select
Outbound Phone Book/List Entries.
Click Add. 
						

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3. The Add/Edit Outbound PhoneBook screen appears.
Enter Outbound PhoneBook data for your MVP2400/2410.  Note that
the Advanced button gives access to the Alternate IP Routing feature, if
needed.  Alternate IP Routing can be implemented in a secondary
screen (as described after the primary screen field definitions below). 
						

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The fields of the Add/Edit Outbound Phone Book screen are described
in the table below.      
Add/Edit Outbound Phone Book: Field Definitions
Field Name Values Description
Destination
Patternprefixes,
area codes,
exchanges,
line
numbers,
extensionsDefines the beginning of
dialing sequences for calls
that will be connected to
another VOIP in the system.
Numbers beginning with
these sequences are diverted
from the PTSN and carried
on Internet or other IP
network.
Total Digits as needed number of digits the phone
user must dial to reach
specified destination
Remove Prefix dialed digits portion of dialed number to
be removed before
completing call to destination
Add Prefix dialed digits digits to be added before
completing call to destination
IP Address n.n.n.n
for
n = 0-255the IP address to which the
call will be directed if it
begins with the destination
pattern given
Description alpha-
numericDescribes the facility or
geographical location at
which the call will be
completed.
Protocol Type SIP or H.323Indicates protocol to be used in
outbound transmission. 
						

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Add/Edit Outbound Phone Book: Field Definitions
(cont’d)
Field Name Values Description
H.323 fields
Use Gatekeepr Y/NIndicates whether or not
gatekeeper is used.
H.323 IDThe H.323 ID assigned to the
destination MultiVOIP.  Only
valid if “Use Gatekeeper” is
enabled for this entry.
Gateway
PrefixThis number becomes
registered with the
GateKeeper.  Call requests
sent to the gatekeeper and
preceded by this prefix will
be routed to the VOIP
gateway.
Q.931 Port
Number1720 Q.931 is the call signalling
protocol for setup and
termination of calls (aka ITU-
T Recommendation I.451).
H.323 employs only one
“well-known” port (1720) for
Q.931 signalling.    If Q.931
message-oriented signalling
protocol is used, the port
number 1720 must be chosen. 
						

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Add/Edit Outbound Phone Book: Field Definitions
(cont’d)
Field Name Values Description
SIP Fields
Use Proxy Y/N Select if proxy server is used.
Transport
ProtocolTCP or
UDPVoip administrator must choose
between UDP and TCP
transmission protocols.  UDP is a
high-speed, low-overhead
connectionless protocol where
data is transmitted without
acknowledgment, guaranteed
delivery, or guaranteed packet
sequence integrity. TCP is slower
connection-oriented protocol
with greater overhead, but
having acknowledgment and
guarantees delivery and packet
sequence integrity.
SIP Port
Number5060 or other
*See RFC3087
(“Control of
Service
Context using
SIP Request-
URI,” by the
Network
Working
Group).
The SIP Port Number is a
UDP logical port number.
The voip will “listen” for SIP
messages at this logical port.
If SIP is used, 5060 is the
default, standard, or “well
known” port number to be
used. If 5060 is not used,
then the port number used is
that specified in the SIP
Request URI (Universal
Resource Identifier).
SIP URLsip.userphone
@
hostserver,
where
“userphone”
is the
telephone
number and
“hostserver”is
the domain
name or an
address on the
network
Looking similar to an email
address, a SIP URL
identifies a users address.
In SIP communications, each
caller or callee is identified
by a SIP url:
sip:user_name@host_name.
The format of a sip url is very
similar to an email address,
except that the “sip:“ prefix is
used. 
						

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Advanced
button-- Gives access to secondary
screen where an Alternate IP
Route can be specified for
backup or redundancy of
signal paths.  See discussion
on next page.
Clicking on the Advanced button brings up the Alternate Routing secondary screen.
This feature provides an alternate path for calls if the primary IP network cannot carry
the traffic.  Often in cases of failure, call traffic is temporarily diverted into the PSTN.
However, this feature could also be used to divert traffic to a redundant (backup) unit
in case one voip unit fails.  The user must specify the IP address of the alternate route
for each destination pattern entry in the Outbound Phonebook. 
						

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Alternate Routing Field Definitions
Field
NameValues Description
Alternate
IP
Addressn.n.n.n
where
n= 0-255Alternate destination for outbound data traffic
in case of excessive delay in data transmission.
Round
Trip
Delaymilliseconds The Round Trip Delay is the criterion for
judging when a data pathway is considered
blocked.  When the delay exceeds the
threshold specified here, the data stream will
be diverted to the alternate destination
specified as the Alternate IP Address.