Digi TransPort WR31 - Page 603

Configure legacy protocols Configure Protocol Switch software
Digi TransPort WR Routers User Guide 603
LAPB 2 Default Window Size: 2 1 3 4 5 6 7
The default window size for calls being switched onto LAPB 2. The default window size is 2. The
valid range is 1 to 7.
IP Stream / XOT Parameters
IP Stream or XOT Remote IP Address:
For calls being switched in the direction of XOT, this parameter specifies the destination IP
address for the outgoing XOT call. The router also uses this value as the destination IP address in
the IP/UDP stream modes.
IP Stream or XOT Backup IP Address
If the Switch from XOT to parameter is set to XOT, this is the IP address the XOT call will be
switched to, if the original XOT IP address is unavailable.
IP Stream Port
The IP port number to use when IP stream or UDP stream are selected as the parameter for any
of the Switch from or Backup from parameters.
Note:
The XOT remote IP address and IP stream port parameters are overridden by the values in the
NUA/NUI to IP addresses table if the call matches any entry in that table.
IP Length Header: Off On 8583 Ascii 4 byte On (inclusive)
When IP length header is On, a length indicator field is inserted at the start of each packet. When
set to 8583 Ascii 4 byte, the IP length header conforms to the ISO 8583 format.
Source IP address interface: Auto Ethernet PPP
The default value for this parameter is Auto, which means that the source IP address of an
outgoing XOT connection on an un-NATed W-WAN link is the address of the PPP interface
assigned to W-WAN. This is because the XOT connection is initiated (automatically) within the
router, and does not originate from the local subnet (LAN segment to which the router is
attached via the Ethernet interface). However, this means that if you are routing traffic from the
local subnet across a VPN tunnel, you would have to set up two Eroutes: one to match the local
subnet address, and one to match the XOT source address, such as the address of the PPP
interface associated with to the wireless network. If set to Ethernet, the router uses the IP
address of the Ethernet port instead of that of the PPP interface, so that you need only set up on
Eroute.