Cisco WS-C2960S-24PD-L Software Guide - Page 215

Chapter 7 Configuring the Switch Ports Configuring the LRE Ports Types of LRE Profiles The LRE switches are shipped with predefined profiles (Table 7-1) categorized as public (global) mode and private (per-port) mode profiles. By default, all LRE ports on the switch are enabled with the LRE-10 private profile. This default profile allows the upstream and downstream transmission rate on the LRE link to be 10 Mbps. • Public-We strongly recommend using a public profile if the switch is used with equipment directly connected to a Public Switched Telephone Network (PSTN) without a private branch exchange (PBX) between the LRE switch and the public telephone lines. When the switch is configured with a public profile, all LRE ports use the same configuration to prevent the switch from causing interference with the other lines on the PSTN. Note Consult the regulations for connecting to the PSTN in your area. Note Cisco LRE products can share lines with analog telephones, Integrated Services Digital Network (ISDN), and digital PBX switch telephones that use the 0 to 700 kHz frequency range. The standards for spectral profiles have not yet been ratified. The PUBLIC-ANSI profile corresponds to ANSI Plan 998. The PUBLIC-ETSI profile corresponds to ETSI Plan 997. Both plans are draft standards. Contact Cisco Systems for the latest information about standards ratification or for updates to the public profiles. • Private-You can use a private profile if the LRE switch is not used with equipment connected to a PSTN. The switch supports a variety of private profiles that offer different link speeds and maximum distances. In general, the higher the link speed, the shorter the maximum distance. Private profiles are assigned on a per-port basis. The ports on an LRE switch can be assigned the same or different private profiles. Note Use the rates and distances in Table 7-1 as guidelines only. Factors such as the type of cable that you use, how it is bundled, and the interference and noise on the LRE link can affect the actual LRE link performance. Contact Cisco Systems for information about limitations and optimization of LRE link performance. The net data rates in the table are slightly less than the gross data rates displayed by the show controllers lre profile names privileged EXEC command. The actual bandwidth is somewhat less. Table 7-1 LRE Profiles Profile Name PUBLIC-ANSI PUBLIC-ETSI LRE-5 LRE-10 (default) LRE-15 LRE-10-1 LRE-10-3 Profile Type Public Public Private Private Private Private Private LRE Link LRE Link Maximum Distance between Downstream Rate (Mbps) Upstream Rate (Mbps) the LRE Switch and LRE CPE 15.17 4.27 4101 ft (1250 m) 11.38 4.27 4101 ft (1250 m) 5.69 5.69 4921 ft (1500 m) 11.38 11.38 4101 ft (1250 m) 15.17 17.06 3445 ft (1050 m) 11.38 1.43 4101 ft (1250 m) 11.38 2.87 4101 ft (1250 m) 78-6511-08 Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide 7-17