Microtronix Access User Guide
3.In order for the configuration to take effect, the
Restart WAN Interface
box must be checked.
Otherwise the configuration will be saved, but will not take effect until the next time the interface is
restarted.
4.Click the
Update
button to save changes, and restart the interface if selected.
5.3.2 X.25 Parameters
X.25 Device:
The X.25 WAN Interface being configured. This will be hdlc0 (WAN port 0), or
hdlc1 (Console/WAN port 1).
X.25 Emulation Mode:
The emulation mode may be configured as Data Circuit Equipment
(DCE) or Data Terminating Equipment (DTE) for normal X.25 operation.
In DTE mode, outbound calls choose the highest available logical channel number, and
outbound clear/reset/restart packets will contain DTE cause codes (0, 128-255).
In DCE mode, outbound calls choose the lowest available logical channel number, and
outbound clear/reset/restart packets may contain DCE cause codes (1-127). Normally this is
opposite to the peer device, but may be set to DCE for DCE behavior regardless of the peer
setting.
Choosing RAW disables X.25 layer 3 processing and allows LAPB I-frames to pass
transparently through the interface.
Allow Reverse Charge Calls:
Specifies that the reverse charging facility will be allowed to be
present in incoming calls (the called party pays for the charges).
Disallow Outgoing Flow Control Facilities:
Selecting this prevents any outbound X.25 call
request from containing packet or window size negotiation facilities. This may force a
backwards negotiation to be initiated.
Default Packet Size:
The default maximum number of data bytes to be included in a single
packet on this link. The default value may also be changed by packet size negotiation during
call setup. This MUST match the peer. The normal default is 128.
Maximum Negotiable Packet Size:
The maximum packet size that may be negotiated during
call setup.
X.25 Window Modulus:
X.25 may be set to standard (
Modulo-8
) or extended (
Modulo-128
)
sequencing. Modulo-8 allows for up to 7 packets to be transmitted before receiving an
acknowledgment. Modulo-128 will allow up to 127. This MUST match the peer device.
Default Window Size:
The maximum number of unacknowledged packets that are allowed to
be transmitted or received. This MUST match the peer device. The normal default is 2.
Maximum Negotiable X.25 Window Size:
The maximum window size that may be negotiated
during call setup.
Number of PVC:
The number of Permanent Virtual Circuits for the link. This MUST match the
peer device.
Number of SVC:
The number of Switched Virtual Circuits for the link. This MUST match the
peer device.
Start SVC Logical Channel:
The logical channel number which will be assigned to the first
SVC. This number must be at least one (1) larger than the number of PVCs defined. This
MUST match the peer device.
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