For the first question: Digital cross-connect systems (DCSs) have been used for several years to manage the digital DS0, DS1, and DS3 channels between switches--the intermachine trunks. Digital cross-connect systems provide a termination point for backbone trunks in the local and long distance network. A variety of DCS products can terminate DS1 and/or DS3 trunks, copper or fiber, and cross-connect channels within them. Through this cross-connect arrangement, end-to-end circuits can be established at speeds ranging from 2.4 Kbps to 44.736 Mbps. Using manual reconfiguration commands, circuits can be rerouted by establishing new cross-connect paths at one or more local or remote DCSs. DCSs are planned for deployment in the local loop to provide the same level of control for customer access circuits. In this case, customer access circuits would terminate on a central office DCS where individual data, voice, or video paths would be cross-connected to the appropriate local service equipment or intermachine trunk. DCS provides centralized operations, administration, management, and provisioning capabilities to the carrier. This includes facility and performance monitoring, loopback testing, and alarm generation and processing. Once a circuit is defined via cross-connected channels, the DCS is transparent to data flow. The DCS can be considered an electronic version of a manual patch panel. The DCS also can support a dual path capability between two DCSs. These self-healing services all function in the same manner. When a DS3, for example, enters a DCS, the signals it carries can be sent out on two separate transmission paths to their destination. At the destination DCS, the best signal is selected for delivery to the customer. A failure in one path will generate alarms, allowing repair and restoration to occur while customer service continues uninterrupted on the other path. Mike -----Original Message----- From: J K [mailto:[EMAIL PROTECTED]] Sent: Monday, October 30, 2000 8:35 PM To: [EMAIL PROTECTED] Subject: O/T Digital Cross Connect and BGP w/ providers I have a few questions to ask . 1st what exactly is a digital cross connect i know it had to do with sonet/sdh but i need a better explanation on this or a good web site / 2nd what is the normal address block providers allow you to advertise from CIDR. IF anyone can provide this information it would be greatly appreciated .. Jim Koniecki _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. _________________________________ 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]
