If you are doing this at the carrier grade, you might want to consider a session controller from www.nextone.com. it allows you not only to do IP to IP calls between multiple Gateways, Gatekeepers, but also to interconnect different session protocols (SIP and H323) devices.
Introduction: The "external-out enable" command is available for
configuration under the "router ospf process" in case of the IOS-XR
operating system. This command basically enables advertisement of
intra-area routes on the device as external routes in th...
IntroductionIn this article we'll discuss how to troubleshoot packet
loss in the asr9000 and specifically understanding the NP drop counters,
what they mean and what you can do to mitigate them. This document will
be an ongoing effort to improve troublesh...