BOSST60 IAX2 Phone User Manual (V1.43)
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domain name, program will visit DNS to resolve this domain name into IP
address. Besides, if local IP address is allocated by DHCP, we will check if the
allocated IP address conflicts with other devices. All these work will cost some
time to complete, which causes the delay of registration. To speed it up, try the
following two methods:
1.set "upgrade type" to "disable", then phone will not check new upgrades
from the FTP server.
2.set "sntp IP"to "255.255.255.255"
，
then phone will not visit timer server to
get date and time. If one must know the current date and time, please set "sntp
IP" to the IP address of a local time server which has fast access.
Q17 How to set TOS field?
A:The 8-bit TOS field specifies how the datagram should be handled and is
broken down into five subfields: Let’s assume that bit 0 is the
most-important-bit and bit 7 is the least-important-bit.
Bit 0-2: Three PRECEDENCE bits specify datagram precedence, with values
ranging from 0 (normal precedence) through 7 (network control), allowing
senders to indicate the importance of each datagram.
Bit 3: Also called D bit. When set, the D bit requests low delay.
Bit 4: Also called T bit. When set, the T bit requests high throughput.
Bit5: Also called R bit. When set, the R bit requests high reliability.
