Page 381 - Asterisk™: The Future of Telephony

externip=216.239.39.104
externrefresh
If externhost is used, externrefresh configures how long, in seconds, should pass
between DNS lookups:
externrefresh=30
g726nonstandard
This parameter can be set when dealing with peers that incorrectly use the wrong
encoding for the G.726 codec. This setting tells Asterisk to use AAL2 packing order
instead of RFC3551 packing order if the peer negotiates G726-32 audio. Ordina-
rily, that would be contrary to the RFC3551 specification, as the peer should be
negotiating AAL2-G726-32 instead. You may need to set this option if you’re using
a Sipura or Grandstream device:

g726nonstandard=yes
ignoreregexpire (global)
If ignoreregexpire is set to yes, Asterisk could do one of two things, for:
Non-realtime peers
When their registration expires, the information will not be removed from
memory or the Asterisk database. If you attempt to place a call to the peer, the
existing information will be used in spite of it having expired.
Realtime peers
When the peer is retrieved from realtime storage, the registration information
will be used regardless of whether it has expired or not; if it expires while the
realtime peer is still in memory (due to caching or other reasons), the infor-
mation will not be removed from realtime storage:
ignoreregexpire=yes|no
jbenable
Enables the use of an RTP jitter buffer on the receiving side of a SIP channel. De-
faults to no. An enabled jitter buffer will be used only if the sending side can create
and the receiving side cannot accept jitter. The SIP channel can accept jitter; thus
a jitter buffer on the receiving side will be used only if it is forced and enabled:
jbenable=yes|no
jbforce
Forces the use of the RTP jitter buffer on the receiving side of a SIP channel. Defaults
to no:
jbforce=yes|no

jbimpl
This setting is used to specify which jitter buffer implementation to use, the
fixed jitter buffer or the adaptive jitter buffer. If the fixed jitter buffer is used, it
will always be the size defined by jbmaxsize. If the adaptive jitter buffer is specified,

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