From: Xue Fei (xuefei@bgctv.com.cn)
Date: Wed Aug 11 2004 - 11:15:30 GMT-3
Thanks for you guys, appreciate your answers!
======= At 2004-08-09, 08:26:13 you wrote: =======
>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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Best regards.
Xue Fei
xuefei@bgctv.com.cn
2004-08-11
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