From: joedeleonardo@cox.net
Date: Mon Aug 09 2004 - 11:38:00 GMT-3
I think the main differences are MPLS, mBGP, ATM (on a much deeper level) & with tagging. There could be a few other things, but I think those are the core differences.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Richard Dumoulin
Sent: Monday, August 09, 2004 6:45 AM
To: swm@emanon.com
Cc: 'ccielab'
Subject: SP track
What are the main differences between R&S and SP apart the MPLS section ? I
have had a look at IPExpert SP book and I have not found a significant
difference. Maybe some topics are to be studied more deeply. What most
attracts me from SP is that the material needed to practice is the same as
R&S...
Do you think that the R&S background is enough for going and practicing the
workbook directly ?
--Richard
-----Original Message-----
From: Scott Morris [mailto:swm@emanon.com]
Sent: lunes, 09 de agosto de 2004 14:26
To: Richard Dumoulin; 'Carlos G Mendioroz'
Cc: 'ccielab'
Subject: RE: what's the difference between DN and line of Cisco IP phone
The whole "ephone" concept is unique to IOS-related implementations of SRST
and CME. It exists noplace else.
However, the concept of "DN" is around in all sorts of telephony areas and
PBX implementations as Carlos has mentioned.
There are many 'gray' areas when dealing with terms in the telephony side of
things and how they get implemented in the world of soft switches. Data
guys tend to blur the lines a bit and (in tradition) not document it! :)
A DN or directory number is exactly that. Some phone number that is known
to your phone switch (be it a hybrid key system, a pbx, a CCM or whatever).
What you do with that phone number is a different story.
Telephones have buttons. Buttons can be assigned features or line
appearances. A line appearance is the termination of a DN to a physical
phone device. You can also terminate DNs in non-physical things like ACD
groups, IVR setups, remote call forwarding, phantom voice mail boxes, etc.
So in very generic terms, a DN is a phone number while a line is the
assigning of a phone number to a particular button on a telephone.
Telephony is an exciting area to get into, but it can also be a very
confusing one with all of the terminology and cross-use of terms (wait until
you start talking CoS to a phone guy!). But that's what keeps life
entertaining!
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
JNCIP, et al. IPExpert CCIE Program Manager IPExpert Sr. Technical
Instructor swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Richard Dumoulin
Sent: Sunday, August 08, 2004 7:32 PM
To: Carlos G Mendioroz
Cc: ccielab
Subject: RE: what's the difference between DN and line of Cisco IP phone
Good, but I don't see from your explanation the difference between ephone-dn
in CME and CCM. All you have talked about can be applied to CME too. So
what's the difference ?
--Richard
-----Original Message-----
From: Carlos G Mendioroz [mailto:tron@huapi.ba.ar]
Sent: lunes, 09 de agosto de 2004 0:20
To: Richard Dumoulin
Cc: Xue Fei; ccielab
Subject: Re: what's the difference between DN and line of Cisco IP phone
Richard,
that terminology applies to CME (Call MAnager Express, i.e. the Call
Manager that "runs" in IOS boxen).
CCM is usually a reference to Cisco Call Manager, or the full blown Call
Manager. Even though terms are simmilar, they are not the same all over
the place.
A DN (directory number) is just that. A number that is part of your
dialplan, and that you can dial to reach some extension/phone. A line
usually refers to the ability to carry one call at one time. So lines are
mapped to phone buttons, and ... lots of fun stuff. But if
you have two lines, you may have two calls at once (usually all but one
holded)
DNs are in turn mapped to lines. Usually on a 1-1 way, but not
necesarilly. You can map many DNs to one line, or many lines to one DN.
Richard Dumoulin wrote:
> An ephone-dn is basically an extension number which provides a voice
> channel to connect to the physical e-phone. When the ephone-dn command
> is entered in the config, a dial-peer pots is created, and when under
> this ephone-dn you enter "number XXX" a virtual FXS voice port is
> created. This is how the extension number is associated to the
> physical ethernet phone. For the line, I am not sure but it might
> refer to the voice-channel mentioned above or the virtual FXS port.
> Take into account that there are no physical phone lines as everything
> is IP here,
>
> --Richard
>
> -----Original Message-----
> From: Xue Fei [mailto:xuefei@bgctv.com.cn]
> Sent: domingo, 08 de agosto de 2004 20:12
> To: ccielab
> Subject: OT: what's the difference between DN and line of Cisco IP
> phone
>
>
> Hi guys,
>
> I'm reading CCM document and would like make clear what the difference
> between "DN(Directory Number)" and "line" of Cisco IP phone. I really
> got confused with them but have no cisco Ip phone to practise.
>
> Thanks in advance!
>
> Xue Fei
> xuefei@bgctv.com.cn
> 2004-08-08
>
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-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
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