User guide

Multi-Tech Systems, Inc. MVPGSM 122
Appendix C – Additional Phone Book
Examples
MVPGSM-to-MVPGSM
The basic setup would consist simply of two VOIPs able to communicate via IP address, with preset phone
numbers entered into the Phone Book of each unit, with the Inbound Phone Book of one unit containing the
exact same information as the Outbound Phone Book of the other unit and vice-versa. This is the underlying
concept behind the Phone Books – they are the reverse of each other so that they match information to
accomplish the connections. This is more applicable to analog VOIP units than the wireless, but it helps with
understanding the purpose of the Phone Book sections.
Example 1:
The Local VOIP has channel 1 populated with a SIM using the phone number 612-555-1234 and the
Remote VOIP has 763-555-4321 as the phone number for the SIM on channel 1. By populating the
Phone Book of each unit with the information from the other, calls can be changed as to appear
local to the receiving unit. This is the most basic setup and illustrates the concept behind the Phone
Book entries and standard VOIP operation. This direct connection then takes advantage of the
wireless connection and the calls are not charged as long-distance.
Example 2:
Multi-Tech VOIP units can also be set to Auto Call, in which case, either or both sides can be set to
automatically dial the other VOIP (‘612-555-1234’ or ‘763-555-4321’) when a phone number
matches the entry set to Auto Call, the MVPGSM will automatically dial the corresponding phone
number of the other VOIP unit.
MVPGSM as a Standalone Unit
Operating as a standalone unit (that is, with no corresponding VOIP unit on the receiving end), the MVPGSM can
be used as a SIP gateway to handle all long distance calls and any other call that would be less expensive if the
connection is wireless. In this case, the phone system call control module (e.g. an IP PBX) would determine the
nature of the call being placed and route it to the proper gateway. Incoming calls should be routed using CLIP
routing and/or a receptionist using the Auto Call feature.
Example 3:
Your company has an IP PBX system with an analog VOIP unit for local calls and direct calls to the
office in another city and an MVPGSM that will handle all long distance calls. With this setup, a call
control module handles the call routing – when an extension requests an outside line (by dialing a
“9” first, for example) the call control module then watches what the first digit after the 9 is. If that
first digit is anything other than one of the local area codes, the call is routed through the MVPGSM
to take advantage of the cost savings provided by the wireless network. If the first digit is a local call,
it is sent through the standard PSTN. The analog VOIP could also be setup to connect with a remote
office VOIP as well. In this case then, there would be another access digit (an “8” for example) to
have an extension use the analog VOIP and connect to the remote location as if it were a local call.