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Multi-Tech Systems Mvp-2400/2410/3010, Mvp-210/410/810 Voice/ip Gateways S000249C User Guide
Multi-Tech Systems Mvp-2400/2410/3010, Mvp-210/410/810 Voice/ip Gateways S000249C User Guide
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MultiVOIP User Guide T1 PhoneBook Configuration 241 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.
E1 Phonebook Configuration MultiVOIP User Guide 242 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.
MultiVOIP User Guide T1 PhoneBook Configuration 243 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.)
E1 Phonebook Configuration MultiVOIP User Guide 244 2. Select PhoneBook Modify and then select Outbound Phone Book/List Entries. Click Add.
MultiVOIP User Guide T1 PhoneBook Configuration 245 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).
E1 Phonebook Configuration MultiVOIP User Guide 246 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.
MultiVOIP User Guide T1 PhoneBook Configuration 247 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.
E1 Phonebook Configuration MultiVOIP User Guide 248 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.
MultiVOIP User Guide T1 PhoneBook Configuration 249 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.
E1 Phonebook Configuration MultiVOIP User Guide 250 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.