June 2005
Intermediate to advanced
502 pages
21h 48m
English
Content preview from Switching to VoIP
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Peer-by-Peer Codec Selection
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LDAP as a directory server for large VoIP networks. You could allow anonymous
access to your LDAP server from foreign networks so callers can browse your direc-
tory, but beware of the security risks.
LDAP can solve some administrative headaches for Asterisk. If you’ve
got a find-me-follow-me user with three cell phones, a home phone,
and two office phones who’s already listed in your LDAP directory, it
may be easier to link that user’s extension to the LDAP directory than
it would be to program all of these phone numbers into the dial-plan.
Asterisk offers LDAP integration in the dial-plan using the
LDAPGet
command, which is configured in /etc/asterisk/ldap.conf. You can
download the LDAP Asterisk module from http://www.mezzo.net/
asterisk. With
LDAPGet and Asterisk’s IVR commands, you could even
make Asterisk audibly read the data from the LDAP server to callers.
Commercial directory services for VoIP don’t tend to interoperate, but they are usu-
ally very slick and work well as long as you stick with a single vendor’s PBX and
phones. Cisco’s AVVID architecture implements a directory system that is included
with the CallManager softPBX. It uses XML to drive the displays and command but-
tons on the 7960/7970 SCCP phones to make an interactive, searchable ...
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