> Woof!
> 
> I've been thinking about how to best implement this.  From the
> Voicemail
> system's point of view, currently a user's distribution list is a
> simple
> list of user mailboxes tied to the digit being pressed:
> 
> (index == digit pressed, destination == mailbox)
> 
> <distributions>
>   <list>
>     <index>1</index>
>     <destination>201</destination>
>     <destination>202</destination>
>   </list>
>   <list>
>     <index>2</index>
>     <destination>200</destination>
>   </list>
> </distributions>
> 
> Here are three possible interpretations/implementations.
> 
> 
> Implementation 1:
> 
> One way to view this is to have "group" defined distribution lists.
> A distribution list for a group would be setup by the admin, and
> would define an index and destinations just like above.  It would
> then "join" them somehow with the user's personal definitions and
> create a per user distribution list based on what groups that user
> is a member of.  This is a natural fit with the way
> a user gets group attributes, but can override them with personal
> ones.  But I believe this will be un-workable if a user is in
> multiple groups, and each group defines their index "1" list
> as something different.  sipXconfig would then have to deal with
> that somehow.  Either by merging all destinations per index together
> for that user, or by "moving" indicies around so there are no
> conflicts.
> 
> 
> 
> Implementation 2:
> 
> A second way is to view a group as being a distribution list
> defined as all the users in that group, and allowing the user to
> specify groups as destinations in his personal list.  Represented
> by something like this:
> 
> <distributions>
>   <list>
>     <index>1</index>
>     <destination>201</destination>
>     <group>administrators/group>
>     <group>group1/group>
>   </list>
>   <list>
>     <index>2</index>
>     <destination>200</destination>
>   </list>
> </distributions>
> 
> This defines that distribution list "1" is sent to user 201, all users
> in the "administrators" group, and all users in "group1".
> 
> 
> Implementation 3:
> 
> A third possibility is to have a "system distribution list" concept.
> A system list is defined by the admin and is written out in a single
> top level configuration file with the same format as Implementation 1.
> 
> The IVR would change from this:
> 
>   "Please select the distribution list."
>   "Press Star * to cancel."
> 
> to this:
> 
>   "Please select the personal distribution list."
>   "Press 9 for the system wide distribution list."
>   "Press Star * to cancel."
> 
> (presses 9)
> 
>   "Please select the system wide distribution list."
>   "Press 9 for the personal distribution list."
>   "Press Star * to cancel."
> 
> 
> This would drop the number of possible personal lists from the current
> 9, to 8.  It might cause problems on upgrades if a person has defined
> "9" already.  Somehow, I don't think that is much of an issue.
> 
> 
> Implementation 4:
> 
> Combine Implementations 2 and 3.  This would define system wide lists,
> as well as let users (and the system list) select groups as
> destinations.
> 
> 
> More choices:
> 
> If we were to allow <group> tags in distribution lists, then
> Voicemail would need access to what users are in what groups.
> Here are two proposals to enable that.
> 
> Proposal 1:
>    Let sipXconfig "expand" the groups into <destination> tags.
> 
> This is great from Voicemail's point of view, nothing changes!  Not
> so great from sipXconfig and performance...whenever group membership
> changes, sipXconfig will have to write out large numbers of files
> (one per user that uses that group in one of her lists).
> 
> Proposal 2:
>    Have sipXconfig export group membership into in validusers.xml
> 
> This one isn't bad, only one file to update on group changes.
> Voicemail
> can iterate through it and discover who is in what groups easily
> enough.
> This is not difficult to implement for both Voicemail and sipXconfig.
> 
> 
> What about "all"?
> 
> Oh yeah, that.  Well, either let the admin define a group with all
> users in it (or whatever users he really wants in the "all" group,
> which
> somehow I get the feeling isn't really "all") and just specify that.
> Or have the system generate a new "allusers" group that somehow new
> users
> are magically added as part of that group on creation.  That's some
> sipXconfig
> magic that would have to occur to do that, I think.
> 
> Another way is to have a "special" name that Voicemail knows expands
> to "all", as in:
>    <group>~~allusers~~</group>
> And some special sipXconfig UI to allow the user to specify that.
This
> is a kludge, there really isn't an "~~allusers~~" group, just some
> magic string that Voicemail can detect which it will expand by
> iterating through the validusers.xml file.
> 
> A third way is to define yet another tag:
>    <all></all>
> And some special sipXconfig UI to allow the user to specify that.
> 
> 
> My personal choice would be Implementation 4, along with Proposal 2.
> This would allow the existing personal distribution lists to be
> augmented by a top level system wide distribution list.  In addition,
> I advocate adding the <group> tag and letting the voicemail system
> expand the group into the current members as needed.  For the "all"
> case, create a new "allusers" group that all new users are a member
> of (allowing the admin to remove select users as desired).
> 
> 

Very good set of options. The groups being allowed to personal
distribution lists isn't "great" as many users have no idea who is in a
group. I guess if the admin notifies users of the existence it would be
ok. With no ability for the user to know who is in a group not sure I
see this being worth much effort. Of course I am sure others have
opinions :) Groups would be good for the admin created lists though and
I do think the all option you have is good.

My nickel. 

> --Woof!
> 
> 
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