Caller Name set using SetCIDName or SetCallerID is not displayed by
Zyxel P2000W (Firmware VWJ000F). The same problem has been
mentionend before, but I did not find any solution or hint.
http://lists.digium.com/pipermail/asterisk-users/2005-January/082801.html
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Stefan Tichy <asterisk@pi4tel.de>