John,
When I suggested the solution we used to implement VoiP support with
DSN, I was only making reference to the operational configuration required
to support VoIP itself. Having been in the military(AF) for some eight
years I do know of the information Paul mentioned. In our implementation we
had access to the Government Demarc(switch) which was already supporting
DSN.
The question then would be if the solution you're providing is going to
interface with a switch that already supports existing DSN calling.
In this case the trunk that is used for DSN service is pretty much
transparent like allthe other trunks.In that case the 8 prefix used in
dialing DSN would pretty much identify the calls that will ride the trunk
designated for DSN.
Nigel
former SSgt(seperated) :->
>From: "John Kaberna"
>Reply-To: "John Kaberna"
>To: [EMAIL PROTECTED]
>Subject: Re: Subject: OT: Call Manager and Military DSN [7:29805]
>Date: Fri, 21 Dec 2001 13:59:05 -0500
>
>Thanks for the great info Paul.
>
>1. Is the Call Manager a DSN compliant switch?
>2. Do you have to order a separate DSN compliant trunk from the Telco?
>
>John Kaberna
>CCIE #7146
>NETCG Inc.
>www.netcginc.com
>(415) 750-3800
>
>Instructor for CCBootcamp 5-day class www.ccbootcamp.com
>__________________
>CCIE Security Training
>www.netcginc.com/training.htm
>
>
>""Paul Werner"" wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > DSN is not exactly what I would refer to as tapping into the
> > local telco. DSN (Defense Switched Network) replaced AUTOVON
> > (Automatic Voice network in the mid to late 1980s and through
> > the early 90s). AUTOVON was set up to principally be a voice
> > only network, and in many case over analog switch facilities.
> > DSN converted it over to all diigital, and included voice,
> > video, and data over the same trunks.
> >
> > The key difference between DSN and a regular commercial call is
> > they go over different trunks and they terminate at DSN
> > compliant switches. There are several things different about
> > DSN compliant switches, but the key difference is the use of
> > precedence, and precedence codes. They have no real
> > counterpart in a commercial trunk, other than an operator
> > interrupt for an emergency. With DSN, the end user can preempt
> > a trunk and knock another user off the line with the proper
> > precedence level. Some folks out there who know their RFCs and
> > remember the early 760 series standards may recognize those
> > precedence levels. They are:
> >
> > FLASH OVERRIDE (FO) -FO takes precedence over and preempts all
> > calls on the DSN and is not preemptible. FO is reserved for the
> > President of the United States, Secretary of Defense, Chairman
> > of the Joint Chiefs of Staff, chiefs of military services, and
> > others as specified by the President.
> >
> > FLASH (F) -FLASH calls override lower precedence calls and can
> > be preempted by FLASH OVERRIDE only. Some of the uses for FLASH
> > are initial enemy contact, major strategic decisions of great
> > urgency, and presidential action notices essential to national
> > survival during attack or preattack conditions.
> >
> > IMMEDIATE (1) -IMMEDIATE precedence preempts PRIORITY and
> > ROUTINE calls and is reserved for calls pertaining to
> > situations that gravely affect the security of the United
> > States. Examples of IMMEDIATE calls are enemy contact,
> > intelligence essential to national security, widespread civil
> > disturbance, and vital information concerning aircraft,
> > spacecraft, or missile operations.
> >
> > PRIORITY (P) -PRIORITY precedence is for calls requiring
> > expeditious action or furnishing essential information for the
> > conduct of government operations. Examples of PRIORITY calls
> > are intelligence; movement of naval, air, and ground forces;
> > and important information concerning administrative military
> > support functions.
> >
> > ROUTINE (R) -ROUTINE precedence is for official government
> > communications that require rapid transmission by telephone.
> > These calls do not require preferential handling.
> >
> >
> > When I was involved in DSN communications in Europe, my unit
> > had a Flash precedence phone line, mainly because we had a
> > special mission (which is about all I can say). We had the
> > capability of bumping everybody off the DSN network save for
> > the CINC US Army Europe and a few other folks. You will most
> > likely have to deal with the issue of precedence. Also, access
> > to a commercial line is normally done with dialing a 9 first
> > (typical for trunk access); DSN usually uses an 8 - Your
> > mileage may vary; check your local listings.
> >
> > Finally, DSN uses a slightly different dial plan than the rest
> > of the universe (go figure:-) While you may be able to access
> > the US with a country code of 001, or Germany with a country
> > code of 49, that's not how it's done with DSN. Access is
> > determined by regions, and each region has its own "country
> > code". The regions are:
> >
> > Canadian Section
> > Caribbean Section
> > CONUS Section
> > European Section
> > Pacific/Alaska Section
> > Southwest Asia Section
> >
> > All of the above information is public knowledge and freely
> > available. Anything more is likely classified, and not subject
> > to posting on this list. In case it isn't already clear at
> > this point, DSN is totally separate from the PSTN.
> >
> > HTH,
> >
> > Paul Werner
> >
> >
> > > I am working on an IP telephony solution and I need to hook
> > in to the
> > > DSN.
> > > From my current understanding DSN is sent out to the local
> > telco via the
> > > PSTN and is routed from there. This would make for a fairly
> > simple dial
> > > plan
> > > in Call Manager. Has anybody heard anything different about
> > how DSN is
> > > setup to work?
> >
> > ________________________________________________
> > Get your own "800" number
> > Voicemail, fax, email, and a lot more
> > http://www.ureach.com/reg/tag
_________________________________________________________________
Chat with friends online, try MSN Messenger: http://messenger.msn.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=29902&t=29805
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
