User`s guide

Key Telephone System and PBX Interface Options:

FXS interface -

Use this interface when connecting the line side (CO port) of your key telephone

system or PBX to the MultiVOIP gateway. The system will act similarly to connecting directly to

a CO line. Here’s how it works:

Outgoing calls:

The caller needs to access the MultiVOIP gateway in order to receive a dial tone.

An easy approach would be to associate a button on the phone system that will access the

MultiVOIP gateway. At this point, MultiVOIP will generate a dial tone and the caller can call

any other location on the network that is also equipped with a MultiVOIP gateway.

Incoming calls:

MultiVOIP will generate the ring signal, just like an outside CO line. At this

point, you can use the features of the telephone system to determine how to handle the call.

For example, on a key telephone system all of the phones may be programmed to light up.

On a more advanced phone system, you can route the incoming call to a receptionist or to an

Interactive Voice Response (IVR) system.

FXO interface -

Use this interface when connecting the station side (extension port) of your

telephone system to the MultiVOIP gateway.

Outgoing calls:

The caller will need to access the extension in order to receive a dial tone from

the MultiVOIP gateway. This can be done by simply dialing the extension number that the

MultiVOIP is connected to, or by preprogramming a button to access the extension. At this

point, the MultiVOIP gateway will generate a second dial tone. Now, the caller can call any

other location on the network that is also equipped with a MultiVOIP.

Incoming calls:

The MultiVOIP gateway will utilize an extension on the phone system. At this

point, the caller will hear an extension dial tone generated by the remote phone system. The

caller can then complete the call by dialing any other extension on the phone system. An easy

approach to eliminate the need for this “two stage” dialing would be to use the phone system’s

ability to route the incoming call immediately to a reception desk or IVR system.

E&M interface -

E&M is the preferred interface, on a PBX system, because it provides the most

reliable and quickest disconnect among calls allowing the MultiVOIP to re-establish the port for

availability. It is also the interface used when you are using the MultiVOIP solution to replace tie

lines. For outgoing and incoming calls, the dialing behavior is the same as the FXO interface (as

described above).

All channels on the MultiVOIP gateway do not have to be con gured the same way. For example, one

channel could be connected to an extension line off the PBX (using the FXO interface), and the other

channel connected directly to a fax machine (using the FXS interface).

Digital MultiVOIP Con guration:

The digital MultiVOIP uses a T1, E1 or PRI interface to connect to a PBX system. For outgoing and

incoming calls, the dialing behavior is the same as the FXO interface (as described above). Multi-Tech

recommends utilizing a digital MultiVOIP solution when you are connecting 16 or more lines.