Re: out of band in band [7:46530]
Question: Does anyone know why the Americans didn't use the E-1? I have always wondered about this. The T1 was originally developed by ATT in 1957 or 58. It was later adopted by ANSI. The CCITT (Now ITU) standardized the CEPT E1 for most of the world at (I believe) a later date. I'd guess you could say that we didn't use it, because we already had a standard that was in use. I'm sure corrections will follow if this is wrong. Good Luck! Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46552t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: out of band in band [7:46530]
I guess my question is why didn't we upgrade then. Don't you think the E-1 is better? With the same line you get 7 extra B channels. Hu...maybe the French made this and it is all political! Theo Question: Does anyone know why the Americans didn't use the E-1? I have always wondered about this. The T1 was originally developed by ATT in 1957 or 58. It was later adopted by ANSI. The CCITT (Now ITU) standardized the CEPT E1 for most of the world at (I believe) a later date. I'd guess you could say that we didn't use it, because we already had a standard that was in use. I'm sure corrections will follow if this is wrong. Good Luck! Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46555t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: out of band in band [7:46530]
Think of how much it would cost to upgrade all the Class4/5 switches in America. Mike Graham CCNp, CCDP - Original Message - From: To: Sent: Friday, June 14, 2002 7:55 AM Subject: Re: out of band in band [7:46530] I guess my question is why didn't we upgrade then. Don't you think the E-1 is better? With the same line you get 7 extra B channels. Hu...maybe the French made this and it is all political! Theo Question: Does anyone know why the Americans didn't use the E-1? I have always wondered about this. The T1 was originally developed by ATT in 1957 or 58. It was later adopted by ANSI. The CCITT (Now ITU) standardized the CEPT E1 for most of the world at (I believe) a later date. I'd guess you could say that we didn't use it, because we already had a standard that was in use. I'm sure corrections will follow if this is wrong. Good Luck! Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46558t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: out of band in band [7:46530]
I THINK, it's because the Americans brought the Technology out first (when it was new), the Europeans waited a while until it had matured and advanced. Japan followed the Americans straight away and the rest of the world came along at the end and followed the newer technology brought out by the Europeans. I think if I recal that's how it went. Mike Graham CCNP, CCDP - Original Message - From: To: Sent: Friday, June 14, 2002 6:26 AM Subject: Re: out of band in band [7:46530] Correct. And the US T-1 uses 23 B in band and the Europeans use 30 B in band. Both use one D 64k out of band. Question: Does anyone know why the Americans didn't use the E-1? I have always wondered about this. Theo Kris Keen Sent by: [EMAIL PROTECTED] 06/14/2002 11:30 AM Please respond to Kris Keen To: [EMAIL PROTECTED] cc: Subject:out of band in band [7:46530] Can someone clarify the terms above? D Channel uses Out of Band Signaling, the B Channel uses In Band signaling? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46557t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: out of band in band [7:46530]
Yeah I know but this is a questionsome Japanese have asked me here in Japan and I have never really known. I always assumed it had to do with economic politics that was all. Michael Graham Sent by: [EMAIL PROTECTED] 06/14/2002 04:29 PM Please respond to Michael Graham To: [EMAIL PROTECTED] cc: Subject:Re: out of band in band [7:46530] Think of how much it would cost to upgrade all the Class4/5 switches in America. Mike Graham CCNp, CCDP - Original Message - From: To: Sent: Friday, June 14, 2002 7:55 AM Subject: Re: out of band in band [7:46530] I guess my question is why didn't we upgrade then. Don't you think the E-1 is better? With the same line you get 7 extra B channels. Hu...maybe the French made this and it is all political! Theo Question: Does anyone know why the Americans didn't use the E-1? I have always wondered about this. The T1 was originally developed by ATT in 1957 or 58. It was later adopted by ANSI. The CCITT (Now ITU) standardized the CEPT E1 for most of the world at (I believe) a later date. I'd guess you could say that we didn't use it, because we already had a standard that was in use. I'm sure corrections will follow if this is wrong. Good Luck! Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46562t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: out of band in band [7:46530]
It's a matter of where signaling is used, as I understand it. If signaling/control for the routing of a call happens through the B channels, then it's in-band b/c part of the bandwidth of the bearer channels is taken up by signaling/call control. D channel is considered out-of-band b/c it's not a bearer channel. The voice call/data transfer is not going over this channel. It's just there to handle signaling for the B channels, therefore leaving all the B-channel bandwidth available. SS7 is an out-of-band protocol/network that handles all signaling b/w Telcos to connect and route calls end to end. No voice channels actually go over the SS7 network. It just handles all the overhead in the management of a call. Hope this makes sense. Kris Keen wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Can someone clarify the terms above? D Channel uses Out of Band Signaling, the B Channel uses In Band signaling? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46585t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: out of band in band [7:46530]
Kris, in-band-signaling describes situation when signaling is transported through the same communication channel as data. out-of-band is when it is transported through the separate channel. ISDN (no matter if it is T1 or E1 variant) uses out-of-band signaling, because signaling is using D channel, while data/voice is using B channels. Voice transported through T1 network is using in-band signaling, because signaling is using the same 64Kbps channel as voice, robbing some bits for signaling. This is also called CAS (channel associated signaling). Voice transported through E1 network is using out-of-band signaling, because all signaling is happening on separate channel, time slot 16. This is also called CCS (common channel signaling). When you telnet to your routers, your management session is in-band, because it uses the same communication channel as user data. If you connect console cable, than it is out-of-band. Hope this helps. Sasa Kris Keen wrote: Can someone clarify the terms above? D Channel uses Out of Band Signaling, the B Channel uses In Band signaling? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46613t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
out of band in band [7:46530]
Can someone clarify the terms above? D Channel uses Out of Band Signaling, the B Channel uses In Band signaling? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46530t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: out of band in band [7:46530]
Correct. And the US T-1 uses 23 B in band and the Europeans use 30 B in band. Both use one D 64k out of band. Question: Does anyone know why the Americans didn't use the E-1? I have always wondered about this. Theo Kris Keen Sent by: [EMAIL PROTECTED] 06/14/2002 11:30 AM Please respond to Kris Keen To: [EMAIL PROTECTED] cc: Subject:out of band in band [7:46530] Can someone clarify the terms above? D Channel uses Out of Band Signaling, the B Channel uses In Band signaling? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=46551t=46530 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
