Voip Trunk Call Routing Concept - Samsung Officeserv 7100 Technical Manual

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OfficeServ 7100 SPECIAL APPLICATIONS
TECHNICAL MANUAL PART 2 JANUARY 2009
H.323 or SIP Trunking Gateway
The OfficeServ 7100 MGI functions as a VoIP trunking gateway. The OfficeServ 7100
software considers the MGI ports as trunk ports. As a trunking gateway the MGI card
support the H.323 or SIP standards on a per port basis as needed. The OfficeServ 7100
MGI card programming is similar to installing or adding other cards in the OfficeServ
7100 system. Each MGI card has ports assigned that are comparable to the system
trunk ports. In a default system the OfficeServ 7100 will automatically identify that an
MGI card is present and assign trunk numbers to the available ports. The trunk
numbers will be in the 84XX range. If an MGI card is to be added to an existing system
it is recommended to power off the cabinet that the card is going to be installed in.
Programming MGI trunks are similar to programming traditional trunks. The MGI VoIP
trunks can be in trunk groups (MMC 603 Assign Trunk Groups) or MGI VoIP trunks can
be individually assigned as Direct Trunk Keys (MMC 722, MMC 723 Key Assignments).
MGI VoIP trunks can also be included in LCR programming to provide alternative
routing of outgoing calls. Station calls between OfficeServ 7100 systems via VoIP can
also be accomplished via MGI trunks. An MGI or other compatible VoIP gateway
equipment must be present on the LAN or WAN to place VoIP calls to and from the
MGI card.

VoIP Trunk Call Routing Concept

VoIP calls via the MGI use routing tables to determine where to route the call based on
digits dialed. Digits can be added or removed as part of the call and be transparent to
the calling station. The digits dialed then reference a table that has the destination IP
address then repeats the digits needed at the far end.
Programming of the MGI follows an LCR type of programming where the tables are
used to reference the dialed number and send the call to the right IP destination. It is
not necessary to have System feature LCR programmed to use the MGI VoIP facilities.
Incoming calls via the MGI can be directed three different ways, Follow the DID
Translation table, Follow Incoming Digits or Follow Trunk ring assignments. These
settings are system wide and affect all MGI cards used as trunking gateways. The
outbound routing tables are referenced by MGI cards system wide.
A basic example of the direct station to station dialing string in an OfficeServ 7100
directing a call over an MGI card to another OfficeServ 7100 MGI card is as follows:
80 0 201
• 80 is the trunk group access code to the MGI trunks.
• 0 is the access code that references an IP address table.
• 201 is a station in the distant OfficeServ 7100 system.
2.6.14