I am having a strange problem where a user cannot call one specific number (from different phones).  The dialed number will ring once, then you get a "your call cannot be completed as dialed, please check the number and try your call again".  ...

We need to locate line coding, framing, signaling, ISDN protocol and hunting information for an existing long distance circuit. We are changing service providers and we have not been able to provide them with the information from our as-builts.

Does anyone know why some voice mails (internal and external) are not making it to some user's mailboxes? The greeting is heard and a message is left after the tone. The phone has missed calls - the message just does not make it. Yet some do. Unit...