Ethereal-users: [Ethereal-users] [Err] Ethereal-users Digest, Vol 40, Issue 18

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From: spam_master@xxxxxxxxx
Date: Fri, 18 Aug 2006 04:05:52 +0900
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The Ethereal project is being continued at a new site.  Please go to
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skypiri@xxxxxxxxxxxxxxxxxxx¿¡°Ô ¸ÞÀÏ ¹ß¼ÛÀ» 3¹ø ½ÃµµÇßÁö¸¸ ½ÇÆÐÇÏ¿´½À´Ï´Ù.
(½ÇÆÐ ÀÌÀ¯ : 550 5.1.1 <skypiri@xxxxxxxxx>... User unknown(203.253.150.140))

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User unknown       :¸ÞÀÏÀ» ¼ö½ÅÇÒ »ç¿ëÀÚ°¡ Á¸ÀçÇÏÁö ¾ÊÀ½
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DATA write fail    :¼ö½Å ¸ÞÀÏ ¼­¹ö·Î ¸Þ¼¼Áö ¼Û½Å ½ÇÆÐ
DATA reponse fail  :¼ö½Å ¸ÞÀÏ ¼­¹ö·ÎºÎÅÍ ¸Þ¼¼Áö ¼ö½Å ½ÇÆÐ

Reporting-MTA: dns; hau.ac.kr

Final-Recipient: rfc822;skypiri@mail.hangkong.ac.kr
Diagnostic-Code: smtp; 550 error - 5.1.1 <skypiri@hau.ac.kr>... User
	unknown(203.253.150.140)
Action: failed
Status: 5.1.1
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Today's Topics:

   1. [Err] Ethereal-users Digest, Vol 40, Issue 17
      (spam_master@xxxxxxxxx)
   2. round trip delay in RTCP packets (amenezes@xxxxxxxxxxxxx)


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Message: 1
Date: Fri, 18 Aug 2006 02:08:19 +0900
From: spam_master@xxxxxxxxx
Subject: [Ethereal-users] [Err] Ethereal-users Digest, Vol 40, Issue
	17
To: ethereal-users@xxxxxxxxxxxx
Message-ID: <20060817170120.D8F8E4615A@xxxxxxxxxxxxxxxxx>
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Transmit Report:

skypiri@xxxxxxxxxxxxxxxxxxx¿¡°Ô ¸ÞÀÏ ¹ß¼ÛÀ» 3¹ø ½ÃµµÇßÁö¸¸ ½ÇÆÐÇÏ¿´½À´Ï´Ù.
(½ÇÆÐ ÀÌÀ¯ : 550 5.1.1 <skypiri@xxxxxxxxx>... User unknown(203.253.150.140))

<Âü°í> ½ÇÆÐ ÀÌÀ¯¿¡ ´ëÇÑ ¼³¸í
User unknown       :¸ÞÀÏÀ» ¼ö½ÅÇÒ »ç¿ëÀÚ°¡ Á¸ÀçÇÏÁö ¾ÊÀ½
Socket connect fail:¼ö½Å ¸ÞÀÏ ¼­¹ö¿Í ¿¬°á ½ÇÆÐ
DATA write fail    :¼ö½Å ¸ÞÀÏ ¼­¹ö·Î ¸Þ¼¼Áö ¼Û½Å ½ÇÆÐ
DATA reponse fail  :¼ö½Å ¸ÞÀÏ ¼­¹ö·ÎºÎÅÍ ¸Þ¼¼Áö ¼ö½Å ½ÇÆÐ
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Subject: Ethereal-users Digest, Vol 40, Issue 17
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Message: 2
Date: Thu, 17 Aug 2006 15:54:25 -0300
From: amenezes@xxxxxxxxxxxxx
Subject: [Ethereal-users] round trip delay in RTCP packets
To: ethereal-users@xxxxxxxxxxxx
Message-ID:
	<OFC16350A2.1AC982DB-ON832571CD.0064927E-832571CD.0067A9DA@LocalDomain>
	
Content-Type: text/plain; charset="iso-8859-1"



How to calculate the round trip delay in a RTCP packets using Ethereal for
windows?

According to H.225, in a RTCP frame and RTP informations, we can calculate
round trip delay with the formula " delay=A - LSR - DLSR".

Parameters A and DLSR are easily find in a Ethereal rtcp frame :

1) A is the time the rtcp frame arrived since the begining of the call.

2) DLSR in seconds, is the number informed in dlsr positions divided by
65536.

3) But is hard to understand the big number in "Last SR time stamp" . How
to find LSR in seconds? According to H.225, LSR is the middle 32 ou 64 of
last NTP time stamp.

Please see the capture below of a Voip call:

(Embedded image moved to file: pic11647.pcx)



(Embedded image moved to file: pic17432.jpg)


Alfredo Guimarães Menezes
Furnas Centrais Elétricas SA
DET.T Depto de Engenharia de Telecomunicações
Divisão de Engenharia de Telefonia e Sistemas Auxiliares
Rua Real Grandeza 219 sala 308 Bloco B
Botafogo Rio de Janeiro  RJ Brasil CEP 22281-900
Tel  (21)2528-5770/4909
Fax (21)2528-2186
email: amenezes@xxxxxxxxxxxxx


______________________________________________________________________
FURNAS CENTRAIS ELETRICAS S.A.
O emitente desta mensagem eletronica e responsavel por seu conteudo e enderecamento.

A mensagem, incluindo seus anexos,  pode  conter  informacao  confidencial  e/ou  de
propriedade da Empresa. Caso voce nao seja o destinatario indicado,  nao  a  utilize,
copie ou  divulgue,  avisando  imediatamente  ao  remetente,  apagando  em  seguida  a
mensagem recebida indevidamente.
______________________________________________________________________
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End of Ethereal-users Digest, Vol 40, Issue 18
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