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Configuring WAN Access
Configuring Host/AIM6 and Host/Dual ports
3
4
5
In a local loopback test, data originating at the local site loops back to its originating port
without going out over the WAN. It is as though a data mirror were held up to the data at the
WAN interface, and the data reflected back to the originator. The WAN interface is the port on
the MAX unit that connects to a WAN line.
For more information about loopback tests, see the MAX Administration Guide.
Enabling Loop Sealing Current
The BRI/LT > Line Diag > Line N > Sealing Current parameter is a toggle that turns the loop
sealing current on and off. Turn the loop sealing current on to retard oxidation on the DSL line.
If you toggle it on, the following message appears in the Main Edit Menu window:
Message #242
Loop Sealing Current
Disable Loop Sealing Current if you are not concerned about oxidation on the DSL line. If you
toggle the loop sealing current off, the following message appears in the Edit window:
Message #243
Loop Sealing Current
Configuring Host/AIM6 and Host/Dual ports
You can connect a videoconferencing codec (coder/decoder) to a port supporting inverse
multiplexing to communicate over a point-to-point link. The MAX supports two types of
inverse multiplexing: Bandwidth ON Demand Interoperability Group (BONDING) and
Ascend Inverse Multiplexing (AIM). Both types are supported by V.35, RS-449, or X.21 port
on the MAX unit. Typically, inverse-multiplexed calls are between video codecs and other
devices that might need high bandwidth serial data over the WAN.
Inverse multiplexing uses pins for controlling the data flow through the port. A device sends a
signal through a pin and over the line to another device. The signal indicates the control-line
state. For example, when a device sends a signal indicating that it has data to send, the
control-line state is RTS (Request to Send). If the other device sends a signal to indicate that it
is ready to receive data, its control-line state is DTR (Data Transmit Ready). The process of
sending these synchronization signals between inverse multiplexing ports is called
handshaking.
You can install two types of inverse multiplexing cards on a MAX unit: Host/AIM6 and
Host/Dual. The Host/AIM6 card supports six ports and the Host/Dual card supports two ports.
Both cards support of the same dialing protocols: AIM/Bonding, RS-366, V.25 bis, and X.21.
Note: When you install a Host/AIM6 or Host/Dual card on the MAX unit, the card's ports
become the default route for inbound data calls, taking precedence over the bridge/router
3-48
Select the Line LoopBack command and press Enter.
In the confirmation dialog box that appears, select 1=Line N LB.
While the line loops back, normal data transfer is disrupted.
Press Escape to cancel the loopback.
now ON
now OFF
MAX 6000/3000 Network Configuration Guide
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