OPEN 812L VoIP ATA Router
User Guide
Page 42
OPEN Networks Pty Ltd
www.opennw.com
Field Name
Description
1483 Routed IP VC-MUX
Classical IP over ATM
– this option is for non-static (dynamic) IP
addresses.
Host Name
: When the DHCP Client is enabled, copy the VSP-
recognized Host name here. The Host Name can be up to 19
characters.
MAC Spoofing
Enable MAC Spoofing to make a different MAC Address appear
on the WAN side. The default is set to DISABLED. This is also
used to solve the scenario where the VSP only recognizes one
MAC Address.
MAC Address
: When MAC Spoofing is enabled, copy the VSP-
recognized MAC address here. The format for MAC address is six
pairs of hexa-decimal numbers (0-9, A-F), separated by colons.
The default is set to 00:00:00:00:00:00.
PPP
PPP Enable
is defaulted to disabled. Check the box to enable this
function.
User Name
: Enter the PPP user name as provided by the VSP.
The User Name can be up to 127 characters.
Password: Enter the PPP password as provided by the VSP. The
Password can be up to 127 characters.
MRU
: The MRU (Maximum Receive Unit) field indicates the
maximum size IP packet that the peer of PPP connection (this
device) can receive. During the PPP negotiation, the peer of the
PPP connection will indicate its MRU and will accept any value up
to that size. The actual MTU of the PPP connection will be set to
the smaller of the two (MTU and the peer’s MRU). In the normal
negotiation, the peer will accept this MRU and will not send packet
with information field larger than this value. The range for the MRU
field is 0-32767and the default value is 1492.
MTU
: Maximum Transmission Unit (MTU) is the largest size
packet that can be sent by the modem. If the network stack of any
packet is larger than the MTU value, then the packet will be
fragmented before the transmission. During the PPP negotiation,
the peer of the PPP connection will indicate its MRU and will
accept any value up to that size. The actual MTU of the PPP
connection will be set to the smaller of the two (MTU and the
peer’s MRU). The range for the MTU field is 0-32767 and the
default value is 1492.
MSS
: The Maximum Segment Size is the largest size of data that
TCP will send in a single, un-fragmented IP packet. The LAN client
and the WAN host will indicate their MSS during the TCP
connection handshake. The range for the MSS field is 0-32767
and the default value is 1432.
