The reason to use sites is so that ip-traffic that can stay local does not eat up the bandwidth across the wan. If the local-GC does not respond, windows will go across the wan to query the WAN-GC but without sites configured, there is no guarantee which LDAP/GC server will be used.
Exactly what hinho said. If you use sites with AD between WAN links, it will cut down on AD traffic and free up bandwidth. If your Sites are small (less than 50) and you have a large bandwidth, it would not be so bad. But MS rule of thumb is always use Sites between WAN links. It's fairly easy to setup and lets you cut down on AD replication times, AD calls, etc. Since Unity is integrated closely with AD.. it makes sense to use Sites.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...