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Here are the service records needed to use the Tandberg VCS:      srv     1 0 1719      srv     1 0 1720              srv     0 0 5060               srv     0 0 5060                 srv     0 0 5061               srv     0 0 5061             srv     0 0 5061

There should also be an a-record pointing to the vcs express. (in this example,

Also, should anyone ever need it, here are the ports that an endpoint needs opened outbound if it is registering directly to a VCS express:

TCP/2776 (Q931/H245 for external traversal endpoints) UDP/2776 (RTP Media from external traversal endpoints) UDP/2777 (RTCP Media control traffic from external traversal endpoints) UDP/1719 (H323 RAS signaling from gatekeepers/VCSes and traversal endpoints) TCP/1720 (Q931/H.225 call connect signaling)

UDP/5060 (SIP signaling) TCP/5060 (SIP signaling) TLS/5061 (Encrypted SIP signaling)