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Catalyst 2950 Desktop Switch Software Configuration Guide
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Ch apter 1 Overview
Netwo rk Configuration Ex am ples

Hotel Network Configuration

Figure 1-5 sh ows the Catalyst 2950 LRE switches in a hotel network environment with approximately
200 room s. Th is ne twork inc lude s a PBX swi tch board , a rout er, and hig h-sp eed servers.
Connected to the telephone line in each hotel room is an LRE CPE device, such as a Cisco LRE CPE
device. The LRE CPE device pr ovides:
•Two RJ-11 ports, one for connecting to the telephone jack on the wall and one for connecting to a
POTS telep hone.
•One or mor e RJ-4 5 Et hern et ports for c onnec ting to de vic es s uch as a cus tome r’s laptop, the room’s
IP phone, the television set-top box, or a room en vironmental control device. A Cisco 575 LRE CPE
provides o ne Ether net conn ectio n; a Cisco 58 5 LRE CPE provid es four.
When conn ec ted to the CPE device, the Et hern et devices an d room te le phon e share the sa me telep hon e
line.
Note All telephones not di rectly connec ted to the hotel room CPE devi ce requir e microfilters with a 300-ohm
termination. Microfilters improve voice call quality when voice and data equipment are using the same
telephone li ne. They a lso prev ent nonf iltered tel ephone rings and non filtere d telephone transit ions (such
as on -ho ok t o o ff-hook) from i nte rrupt ing th e E ther ne t c onnec ti on.
Through a p atc h pan el, the telephone lin e f rom ea ch r oom connects t o a n onh omologated POT S sp litt er,
such as the Cisco LRE 48 POTS Splitter. The splitter routes data (high-frequency) and voice
(low-frequency) traf fic from the telephone line to a Catalyst 2950 LRE switch and digital priv ate branch
exchange (PBX). The PBX routes voice traffic to the PSTN.
If a PBX is not on-site, a homologated POTS splitter is required to connect directly to the PSTN.
Note Consult the regulations for connecting to the PSTN in your area.
If a connection to a phone network is not required at all, a splitter is not needed, and the switch can
connec t di rec tly to the pa tc h p anel.
Note Cisco LRE products can share lines with analog telephones, Integrated Services Digital Network (ISDN)
telepho ne network, and PBX switches tha t use the 0 to 700 kHz fr equency rang e.
Data to and from the room devices (such as e-mail for the laptop and IP multicast traffic for the
television) are tran sferred through the LRE link, which is establi s hed between the CPE RJ-11 wall port
and the LRE port on an LRE switch. The upstream and downstream rates on the LRE link are controlled
by a profile configured on each LRE port. If the LRE switch was connected to the PSTN through a
homologat ed POTS splitter, all LRE ports would use an AN SI- com pli ant LR E pr ofile nam ed
LRE-998-15-4.
The Catalyst 2950 LRE switches are cascaded through their 10/100/1000 switch ports. Each switch also
has a 1 0/10 0/100 0 con ne ction t o an a ggregatio n swit ch, suc h as a 3550- 12G swit ch. Th e a ggregation
switch can connect to:
•Accounting, billing, and provisioning servers.
•A route r that provides Inter net ac cess to th e prem ises.