Page 382 - Asterisk™: The Future of Telephony

then the jitter buffer will vary in size up to the maximum size specified by jbmax
size. This setting defaults to fixed:

jbimpl=fixed|adaptive
jblog
Specifies whether or not to enable jitter buffer frame logging. Defaults to no:
jblog=yes|no
jbmaxsize
Sets the maximum length of the jitter buffer, in milliseconds:
jbmaxsize=200
jbresyncthreshold
Jump in the frame timestamps over which the jitter buffer is resynchronized. This
is useful to improve the quality of the voice, with big jumps in/broken timestamps
that are usually sent from exotic devices and programs. Defaults to 1000:
jbresyncthreshold=1000
limitonpeers
This setting tells Asterisk to apply call limits to peers only. This will improve call
limits and status notification for devices set to type=friend because the peer limit
will be checked, and not create a separate limit for the user and peer portions of a
friend:
limitonpeers=yes|no
localnet
localnet is used to tell Asterisk which IP addresses are considered local, so that
the address in the SIP header can be translated to that specified by externip or the
IP address can be looked up with externhost. The IP addresses should be specified
in CIDR notation:

localnet=192.168.1.0/24
localnet=172.16.0.0/16
matchexterniplocally
Specifies that Asterisk should substitute the externip or externhost setting only if
it matches your localnet setting. Unless you have some sort of strange network
setup you will not need to enable this:

matchexterniplocally=yes|no
maxexpiry
This sets the maximum amount of time, in seconds, until a peer’s registration
expires:
maxexpiry=3600

354 | Appendix A: VoIP Channels