Reference; Frequently Asked Questions - Net2Phone Max Series Sales Manual

Reference

FAQs
1) What is the FXS functionality of the Max?
FXS stands for "Foreign Exchange Station". Very basically, you can plug standard analog phones into a
Max FXS unit. The FXS version of the Max does not support inbound PSTN calling, but you can receive
calls (via *72) from other Max units. It is possible to attach FXS lines to a PBX through an analog
trunk card (COIC/COIB).
2) What is the FXO functionality of the Max?
FXO stands for "Foreign Exchange Operator". Basically, FXO allows you to connect the Max to a PBX
through an analog line card (SLIC/SLIB). With an FXO unit, inbound PSTN calls and remote calling are
supported.
3) What does T-1/E-1 mean?
T-1/E-1 is the standard digital interface for high capacity transmission of telephony and data
communications. North America uses the T-1 standard, which supports up to 24 simultaneous calls on
the Max, while Europe utilizes the E-1 standard, which supports up to 30 simultaneous calls. The T-
1/E-1 interface is a single port on the Max.
4) How do I connect a Max T1/E1 to a PBX?
Very simply, connect the T-1/E-1 port on the Max unit to the T-1/E-1 port on the PBX with an RJ-48
cable.
5) What bandwidth is required to use the Max?
The Max requires 17k bandwidth per line in order to maintain the Quality of Service (QoS).
6) How do I upgrade the Max?
Upgrading the Max unit is a relatively quick and easy process. Connect to the Web interface, click on
"upgrade" and follow the instructions. During the upgrade procedure, no calls should be made through
the Max. Upgrade times vary depending on available bandwidth, but normally take no longer than five
minutes.
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