RE: RE: EN55024 question
This interpretation came from the FCC and a Notified Body - in the course of numerous discussions on this subject, may I say. Regards, Bandele Jetstream Communications, Inc. badep...@jetstream.com -Original Message- From: Peter Tarver [mailto:ptar...@nortelnetworks.com] Sent: Friday, September 01, 2000 8:00 AM To: emc-p...@ieee.org Subject: RE: RE: EN55024 question Bandele - Please forgive an ignorant question: I'm not going to pretend to be an EMC standards expert, but I fail to see how the presence or absence of processing an incoming signal has anything to do with whether there is a direct or indirect connection to outside lines. To wit: outside is easily enough understood as a line (presumed metallic) that enters a building structure from an uncontrolled environment and subject to transients. Direct implies to me that there is no interposing hardware, other than interconnects (no voltage surge suppression devices, galvanic isolating equipment, etc). Is this an interpretation from a Notified Body or known to be the intent of the standards committee that wrote the requirement? Regards, Peter L. Tarver, PE ptar...@nortelnetworks.com -Original Message- From: Bandele Adepoju Sent: Thursday, August 31, 2000 1:16 PM Hello Debbie, If the jack has processing capabilities (if it takes the incoming data signal and reprocesses it or reformats it), any connection to it is considered to be an indirect connection. If the jack does not have processing capabilities (if it passes the data signal straight through), any connection to it is considered to be a direct connection. Regards, Bandele Jetstream Communications, Inc. badep...@jetstream.com -Original Message- From: jim_bac...@mail.monarch.com [ mailto:jim_bac...@mail.monarch.com mailto:jim_bac...@mail.monarch.com ] forwarding for Debbie... Reply Separator Subject:EN55024 question Author: Debbie Mallory debbie.mall...@fibre.com List-Post: emc-pstc@listserv.ieee.org Date: 8/25/00 10:59 AM Hello, I have a question about the use of the word directly in Note 2, of Table 2, in EN55024: 1998. It says Applicable only to [telecommunication] ports which according to the manufacturer's specification may connect directly to outdoor cables. If the TTE has a T1/E1 interface that connects to the outdoor cable via a smart jack, is this considered a direct connection (and thus subject to immunity testing) or does it not apply? Can I make any assumptions about whether phone companies throughout the EEU install smart jacks at the customer premises? Thanks for your comments. Regards, Debbie Mallory AFC, Inc. Largo, FL
RE: RE: EN55024 question
Folks, Just to add to the mix of questions so far, here's a few more that Debbie may wish to consider: 1) is the demarkation point for the product clearly identified? 2) Is a smart jack always to be used with the product? Who supplies it (i.e. mfg. or customer)? 3) Is the product in question specified to meet the immunity requirements with/without the use of the smart connector? 4) Are there a million+1garden variety smart jacks or is there only a unique smart jack to connect with this particular product? 5) What will the customer's obligations for installation and deployments of the product be? I guess the point I'm raising is that the product Debbie(below) refers to has to live up to it's specs...whatever they are. If the immunity spec is not to be met stand-alone (i.e. without smart jack) due to whatever the mfg. pushes onto the customer...that's fine but it should be clearly identified on the mfg's side and to their customers in one way or another. Any assumptions that are made regarding what it is that Telcos supply is ok as well...they might be wrong however, so the design docs, approvals and customer supplied information should clearly spell out what the product meets and what the customer's obligations are prior to deployments, implementation and possible field issues. My 2 Cents...if I'm way off track, please accept my apologies. Kaz Gawrzyjal, P. Eng. k...@nortelnetworks.com mailto:k...@nortelnetworks.com calgary...@aol.com mailto:calgary...@aol.com -Original Message- From: Tarver, Peter [SC1:9031:EXCH] Sent: Friday, September 01, 2000 9:00 AM To: emc-p...@ieee.org Subject: RE: RE: EN55024 question Bandele - Please forgive an ignorant question: I'm not going to pretend to be an EMC standards expert, but I fail to see how the presence or absence of processing an incoming signal has anything to do with whether there is a direct or indirect connection to outside lines. To wit: outside is easily enough understood as a line (presumed metallic) that enters a building structure from an uncontrolled environment and subject to transients. Direct implies to me that there is no interposing hardware, other than interconnects (no voltage surge suppression devices, galvanic isolating equipment, etc). Is this an interpretation from a Notified Body or known to be the intent of the standards committee that wrote the requirement? Regards, Peter L. Tarver, PE ptar...@nortelnetworks.com -Original Message- From: Bandele Adepoju Sent: Thursday, August 31, 2000 1:16 PM Hello Debbie, If the jack has processing capabilities (if it takes the incoming data signal and reprocesses it or reformats it), any connection to it is considered to be an indirect connection. If the jack does not have processing capabilities (if it passes the data signal straight through), any connection to it is considered to be a direct connection. Regards, Bandele Jetstream Communications, Inc. badep...@jetstream.com -Original Message- From: jim_bac...@mail.monarch.com [ mailto:jim_bac...@mail.monarch.com mailto:jim_bac...@mail.monarch.com ] forwarding for Debbie... Reply Separator Subject:EN55024 question Author: Debbie Mallory debbie.mall...@fibre.com List-Post: emc-pstc@listserv.ieee.org Date: 8/25/00 10:59 AM Hello, I have a question about the use of the word directly in Note 2, of Table 2, in EN55024: 1998. It says Applicable only to [telecommunication] ports which according to the manufacturer's specification may connect directly to outdoor cables. If the TTE has a T1/E1 interface that connects to the outdoor cable via a smart jack, is this considered a direct connection (and thus subject to immunity testing) or does it not apply? Can I make any assumptions about whether phone companies throughout the EEU install smart jacks at the customer premises? Thanks for your comments. Regards, Debbie Mallory AFC, Inc. Largo, FL
RE: RE: EN55024 question
Bandele - Please forgive an ignorant question: I'm not going to pretend to be an EMC standards expert, but I fail to see how the presence or absence of processing an incoming signal has anything to do with whether there is a direct or indirect connection to outside lines. To wit: outside is easily enough understood as a line (presumed metallic) that enters a building structure from an uncontrolled environment and subject to transients. Direct implies to me that there is no interposing hardware, other than interconnects (no voltage surge suppression devices, galvanic isolating equipment, etc). Is this an interpretation from a Notified Body or known to be the intent of the standards committee that wrote the requirement? Regards, Peter L. Tarver, PE ptar...@nortelnetworks.com -Original Message- From: Bandele Adepoju Sent: Thursday, August 31, 2000 1:16 PM Hello Debbie, If the jack has processing capabilities (if it takes the incoming data signal and reprocesses it or reformats it), any connection to it is considered to be an indirect connection. If the jack does not have processing capabilities (if it passes the data signal straight through), any connection to it is considered to be a direct connection. Regards, Bandele Jetstream Communications, Inc. badep...@jetstream.com -Original Message- From: jim_bac...@mail.monarch.com [mailto:jim_bac...@mail.monarch.com] forwarding for Debbie... Reply Separator Subject:EN55024 question Author: Debbie Mallory debbie.mall...@fibre.com List-Post: emc-pstc@listserv.ieee.org Date: 8/25/00 10:59 AM Hello, I have a question about the use of the word directly in Note 2, of Table 2, in EN55024: 1998. It says Applicable only to [telecommunication] ports which according to the manufacturer's specification may connect directly to outdoor cables. If the TTE has a T1/E1 interface that connects to the outdoor cable via a smart jack, is this considered a direct connection (and thus subject to immunity testing) or does it not apply? Can I make any assumptions about whether phone companies throughout the EEU install smart jacks at the customer premises? Thanks for your comments. Regards, Debbie Mallory AFC, Inc. Largo, FL
