RE: ISDN PRI MODULE
I am assuming that you are probably referring to an E1 PRI interface? Probably G.703? Also, I want to add that if you are dealing with an E1 PRI G.703, unbalance wiring has two Coaxial physical cables while the balanced G.703 uses a RJ-48C connector. Also, realize that many international countries DO NOT provide a DSU NTU on E1 interface. So you will need a router that supports in internal DSU or get an external CSU/DSU. Thanks, Evan You -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of ciscolab Sent: Sunday, November 19, 2000 12:53 PM To: willy george; [EMAIL PROTECTED] Subject:Re: ISDN PRI MODULE Hi Willy! Balanced and Unbalanced is a term carried over from transmission line theory...ie., any form of energy transfer between two points. (It overs data, microwave, telephone circuits, radio antenna, as well as high-voltage power distribution!) A balanced line uses two channels (ie., conductors) for energy transmission. What happens is that the voltage of the two conductors are equal in strength, but opposite in direction (ie., positive and negative voltages) with respect to ground, in this way any induced voltages (ie., interference) are minimised = you can run this type of cable over longer distances without corrupting the original voltage (ie., data). Example: G.703 interface, twin-ax cable, Cat-5 cable, RS-442, POTS copper line (ie., TIP and RING) etc., Advantage: Longer distance runs with less corruption on the channel Disadvantage: More complicated end interfaces and tends to require closer tolerances for the cable = more expensive! An un-balanced line is one in which the voltages are not equal, with respect to ground. Example: X.21 interface, RS-232, TV/Radio coax cable etc., Advantage: Cheaper cable, line drivers (ie., interfaces) are cheaper as well Disadvantage: Not suitable for long distance runs I hope that helps...on the balanced and un'balanced front! Regards, Serge :) - Original Message - From: willy george [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, November 19, 2000 2:35 PM Subject: ISDN PRI MODULE Dear All, I have noticed that when you order an ISDN PRI module for a modular router there are two choices available. Balanced and Unbalanced. Could any one please tell me what the difference is between the two and what is the advantage of using either one of them?. I have also noticed a line "Processmaxtime=200" in the configs of some routers. What exactly does this particular line signify? Thanks in advance for your time Willy _ Chat with your friends as soon as they come online. Get Rediff Bol at http://bol.rediff.com Participate in crazy auctions at http://auctions.rediff.com/auctions/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
ISDN PRI MODULE
Dear All, I have noticed that when you order an ISDN PRI module for a modular router there are two choices available. Balanced and Unbalanced. Could any one please tell me what the difference is between the two and what is the advantage of using either one of them?. I have also noticed a line "Processmaxtime=200" in the configs of some routers. What exactly does this particular line signify? Thanks in advance for your time Willy _ Chat with your friends as soon as they come online. Get Rediff Bol at http://bol.rediff.com Participate in crazy auctions at http://auctions.rediff.com/auctions/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ISDN PRI MODULE
Hi Willy! Balanced and Unbalanced is a term carried over from transmission line theory...ie., any form of energy transfer between two points. (It overs data, microwave, telephone circuits, radio antenna, as well as high-voltage power distribution!) A balanced line uses two channels (ie., conductors) for energy transmission. What happens is that the voltage of the two conductors are equal in strength, but opposite in direction (ie., positive and negative voltages) with respect to ground, in this way any induced voltages (ie., interference) are minimised = you can run this type of cable over longer distances without corrupting the original voltage (ie., data). Example: G.703 interface, twin-ax cable, Cat-5 cable, RS-442, POTS copper line (ie., TIP and RING) etc., Advantage: Longer distance runs with less corruption on the channel Disadvantage: More complicated end interfaces and tends to require closer tolerances for the cable = more expensive! An un-balanced line is one in which the voltages are not equal, with respect to ground. Example: X.21 interface, RS-232, TV/Radio coax cable etc., Advantage: Cheaper cable, line drivers (ie., interfaces) are cheaper as well Disadvantage: Not suitable for long distance runs I hope that helps...on the balanced and un'balanced front! Regards, Serge :) - Original Message - From: willy george [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, November 19, 2000 2:35 PM Subject: ISDN PRI MODULE Dear All, I have noticed that when you order an ISDN PRI module for a modular router there are two choices available. Balanced and Unbalanced. Could any one please tell me what the difference is between the two and what is the advantage of using either one of them?. I have also noticed a line "Processmaxtime=200" in the configs of some routers. What exactly does this particular line signify? Thanks in advance for your time Willy _ Chat with your friends as soon as they come online. Get Rediff Bol at http://bol.rediff.com Participate in crazy auctions at http://auctions.rediff.com/auctions/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]