English dropdown-ico

Manual Cisco Systems 7920

48 pages 2.19 mb
Download

Go to site of 48

Summary
  • Cisco Systems 7920 - page 1

    Corporate He adquarters Cisc o Syst ems , Inc . 170 West Ta sman Drive San Jos e, CA 95 134-1706 USA http://www.ci sco.com Tel: 408 526-4000 800 553- NETS (638 7) Fax: 408 526-4100 Site Sur v e y Guide f or Deplo ying Cisco 7920 IP Phones April 20 05 Text Pa rt Nu mber: OL-6315- 01 ...

  • Cisco Systems 7920 - page 2

    THE SPECIFICATIONS AND INFORMATION REGARDING TH E PRODUCTS IN THIS MANUAL ARE SUBJE CT TO CHANGE WITHOUT NO TICE. ALL STATEMENT S, INFORMATI ON, AND RECOMMENDA TIONS IN T HIS MANUAL ARE BELIEVED TO BE ACCURATE BU T ARE PRESEN TED WITHOUT WARRANTY OF ANY KIND, EXPRE SS OR IMPLIED. USERS MUST TA KE FULL RESPONSIBILITY FOR THEIR AP PLICATION OF ANY PR ...

  • Cisco Systems 7920 - page 3

    iii Site Sur vey Guide fo r Deploying C isco 7920 IP Pho nes OL-6315-01 CONTENTS Preface v CHAPTER 1 Overview 1- 1 Recommenda tion s for Succe ssful VoI P Surveys 1-1 Gettin g star ted 1-2 Minimum Requ irement s for WIPT Cel ls 1-4 The Idea l WIPT Env ironment 1-5 Data Ra te a nd Sign al S trength Cons iderati ons 1-6 Mult i-floo r surv ey 1-7 Comp ...

  • Cisco Systems 7920 - page 4

    Cont ent s iv Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 ...

  • Cisco Systems 7920 - page 5

    v Site Sur vey Guide fo r Deploying C isco 7920 IP Pho nes OL-6315-01 Preface This doc ument provides inst ructio ns and guidelin es for condu cting a site su rvey for wir eless LA Ns using V oice over IP (V oIP) o n Cis co 79 20 IP Phon es. W ith the intro ducti on of voice to a predom inantl y wireless da ta network the method ology of site surve ...

  • Cisco Systems 7920 - page 6

    vi Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Preface ...

  • Cisco Systems 7920 - page 7

    C HAPTER 1-1 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 1 Overview This documen t be gins by identif ying the spec ific radi o en vironmenta l v alue s that ar e ne eded fo r a successful voice de ployment. Note Cisc o offers a Cisco Aironet Wireless Site Survey class for techni cal individuals who w ill be perf orming site ...

  • Cisco Systems 7920 - page 8

    1-2 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Ch apter 1 Over vi ew Recomme ndations for Success ful VoIP Survey s degr adation. This qua lity requiremen t also dictates the need for a fast roami ng solution betwee n access points whe re the network can re associate a client to a new access point with in 100 ms (that is, wit ...

  • Cisco Systems 7920 - page 9

    1-3 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 1 Ov erview Recommen dations f or Succ essful Vo IP Surveys Figur e 1 -1 ACU Site Surv e y Window Noise is def ined as a 2.4-GHz signal that is not in an 802 .11 DSSS format bu t is in the frequency range of the access p oint’s conf igure d ch anne l. The noise can or ...

  • Cisco Systems 7920 - page 10

    1-4 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Ch apter 1 Over vi ew Recomme ndations for Success ful VoIP Survey s Figur e 1 -2 Signal to Noise Ratio Minimum Require ments for WIP T Cells Ta b l e 1 - 1 lists the minimum v alues for v oice and data cells. F or WIPT cells, Cisco recommend s that the cell edg e be –67 dBm a ...

  • Cisco Systems 7920 - page 11

    1-5 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 1 Ov erview Recommen dations f or Succ essful Vo IP Surveys difference in transm itter power an d receiver sensitivity that ma tters beca use the gai n of an an tenna i s recip rocal. T o v erify the ce ll coverage ed ge of –67 d Bm whi le the client is actively sendi ...

  • Cisco Systems 7920 - page 12

    1-6 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Ch apter 1 Over vi ew Recomme ndations for Success ful VoIP Survey s Figure 1-4 also illustrates the recommended o ver lap of 15 to 20 percent for WIPT cells ( larger than the 10 to 15 p ercent for data cells). The reason for the increa se in o verla p is to pro vide en ough capa ...

  • Cisco Systems 7920 - page 13

    1-7 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 1 Ov erview Recommen dations f or Succ essful Vo IP Surveys The char acteristic s of V oIP r equire a met iculous WIPT site sur vey . T o av oid a c all with ji tter , th e delay variation betwe en packets shoul d not exceed 30 ms. Th e one-way de lay should not exceed ...

  • Cisco Systems 7920 - page 14

    1-8 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Ch apter 1 Over vi ew Recomme ndations for Success ful VoIP Survey s Compariso n of a M anual Surve y and an A utomated S urvey Figure 1-6 sh ows an act ual ho spital survey done using Ai rMag net Surveyor wit h an 8 02.11b Cisco PCM350 cl ient ca rd. Four pa nels on t he Ai rMag ...

  • Cisco Systems 7920 - page 15

    1-9 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 1 Ov erview Recommen dations f or Succ essful Vo IP Surveys Fi g u re 1-7 Ho s p i ta l F l oo r Su r vey by a S u r vey Cre w ...

  • Cisco Systems 7920 - page 16

    1-10 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Ch apter 1 Over vi ew Recomme ndations for Success ful VoIP Survey s ...

  • Cisco Systems 7920 - page 17

    C HAPTER 2-1 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 2 Survey Tools AirM agnet offers ma ny tools f or an alyzi ng 80 2.11 perform ance at a site . Fi gure 2-1 sh ows the AirMagn et Survey tool. Cisco reco mmend s AirMagne t for data an d WIPT surveys. Figur e 2-1 AirMagne t Surve y T ool An acc urate s urv ey requi res ...

  • Cisco Systems 7920 - page 18

    2-2 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 2 Su rvey Too ls Figur e 2-2 AirMagnet P a ck et Decode T ool The 7920 survey tool rep orts the signal stren gth of the sign al from the a ccess poi nt as an RSSI value. Most client c ard utilitie s report signal str ength as dBm or per cent of signal str ength. In this c ...

  • Cisco Systems 7920 - page 19

    2-3 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 2 Survey Tools The d ata in Ta b l e 2 - 1 was c reated fr om live tests. Each tool an d card combi nation data po int was taken at the sam e time from the same dis tance. Th e en viro nment w as an open of fice . The fl oor plan used for the test is sho wn in Figure 2- ...

  • Cisco Systems 7920 - page 20

    2-4 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 2 Su rvey Too ls The Cisc o CB21 ADU repor ts signal st rength in dBm . Figur e 2-4 shows the ADU Adv anced Status windo w . Figur e 2-4 ADU Ad v anced Stat us Windo w ...

  • Cisco Systems 7920 - page 21

    2-5 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 2 Survey Tools Figur e 2-5 AirMagnet Surve y T ool ...

  • Cisco Systems 7920 - page 22

    2-6 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 2 Su rvey Too ls The Air Magnet Survey packet de code tool shows signal strengt h in dBm. Figur e 2-6 shows the AirMag net Surv ey P acket Decode win do w . Figur e 2-6 AirMagnet P a ck et Decode Windo w The AiroPeek tr ace sho ws the signal dBm v alue and signal percenta ...

  • Cisco Systems 7920 - page 23

    2-7 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 2 Survey Tools Figur e 2-7 Air oP eek Windo w AiroPeek has options to show real-t ime graphs of current signal strengt h and current noise le vels both in dBm and pe rcen tages, but it does not have a surve y tool like A CU or AirM agne t. Figure 2-8 shows the AiroPeek ...

  • Cisco Systems 7920 - page 24

    2-8 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 2 Su rvey Too ls Figur e 2-8 Air oP eek dBm and Signa l P er centag e Real-Time Graph s Snif fer Pro fr om Network A ssociates sho ws th e signal strength in a perce nt v alue. There is no option to sho w RSSI or dBm v alues. Snif fer Pro is t race utility with no support ...

  • Cisco Systems 7920 - page 25

    2-9 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 2 Survey Tools The Cisc o access point displ ays the signa l strength of the packets fr om the client. The signal str ength of the ac cess point as r eported b y the client utilit y should be relati v ely close to t he signal stre ngth reported by the access point for t ...

  • Cisco Systems 7920 - page 26

    2-10 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 2 Su rvey Too ls Figure 2-11 shows that the 7920 hears th ree acce ss points an d the RSSI values of those access points ar e 18, 31, and 48. Figur e 2-1 1 Cisco 79 20 IP Phone Surv ey Scr een Y ou can also use Air Magnet Su rveyor to de termine chann el s eparation. Fig ...

  • Cisco Systems 7920 - page 27

    2-11 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 2 Survey Tools Survey Too ls for Pa cket Jit ter Survey Tools for Packet Jitter T ypicall y , voice pac kets ar e sent every 20 ms. V oice calls ar e usual ly bursty , co nsist ing of a group of tightly pack ed packet s in a transmit direction follo wed by a tigh tly p ...

  • Cisco Systems 7920 - page 28

    2-12 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 2 Su rvey Too ls Survey To ols for Packet J itter Figur e 2-1 4 AirMagnet Jit te r T ool in an Ent er pr ise Off ice with High 8 02.1 1 T ra ffic Figure 2-15 an d Figure 2 -16 show the L iv eCaptu re window a nd the Station window re sults in a h ome off ice wit h low 80 ...

  • Cisco Systems 7920 - page 29

    2-13 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 2 Survey Tools Survey Too ls for Pa cket Jit ter Home off ice u tiliz ation is 2 .18 p ercent and t he throughp ut i s 246 kbps for 1 1 Mbp s-onl y calls, wit h a single act iv e WIPT call, but utiliz ation is 15.41 perc ent with throughpu t of 248 kbps for 1 Mbps-onl ...

  • Cisco Systems 7920 - page 30

    2-14 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 2 Su rvey Too ls Survey To ols for Packet J itter ...

  • Cisco Systems 7920 - page 31

    C HAPTER 3-1 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 3 Surveying for Cell Capacity an d Channel Re-Use This chap ter de scribe s ho w to perfo rm a site sur ve y to de sign a wirele ss LAN for cel l capaci ty and chan nel re -use. Survey Design f or Cell Capacity Cisco recommends that you install enough access points to ...

  • Cisco Systems 7920 - page 32

    3-2 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapt er 3 Surveying f or Cell Capacit y and Channel Re -Use Survey Des ign for Cell Capac ity Note If the Cisco acces s point is configured to di sable data rates 1, 2, and 5. 5, clients ar e not requi red to transmit on ly at 11 Mbps. In fact, ol der cli ent devices might not b ...

  • Cisco Systems 7920 - page 33

    C HAPTER 4-3 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 4 Conducting a WIPT Survey This chapter describes specific steps for performing a site survey for WIPT . How To Survey for the WIPT Cisco recommen ds that the fi rst step of a surve y is to work wit h administrators at the local site to determ ine the requi rement s of ...

  • Cisco Systems 7920 - page 34

    4-4 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 4 C onducting a WIP T Survey How To Surve y for the WIPT Figur e 4-1 Ideal WIPT En vir onment Channel R e-Use Figure 4-2 shows the typica l chan nel r e-use fo r 802.1 1b and 802.1 1g WLAN s. The two gold chan nel 1 cells a re -8 6 dBm apart from ce nter to cente r . The ...

  • Cisco Systems 7920 - page 35

    4-5 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 4 Condu cting a WIPT Surv ey How To Survey for the WIPT Manual Su rvey for the WIP T Y o u can use passive or activ e mode w hen you use A CU to run a si te survey . Figur e 4-3 shows the A CU Site Surv ey windo ws. Figur e 4-3 ACU Site Surv e y Windows T o set u p acti ...

  • Cisco Systems 7920 - page 36

    4-6 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 4 C onducting a WIP T Survey How To Surve y for the WIPT Figur e 4-4 ACU Site Surv e y Activ e Mode Click OK to retu rn to the Site Surve y screen. Click Start to start the site surv ey in acti v e mode. This information updates constan tly during the surv ey: • Percent ...

  • Cisco Systems 7920 - page 37

    4-7 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 4 Condu cting a WIPT Surv ey How To Survey for the WIPT The AirMagnet su rve yor works v ery well for surv e ying a site with an in stalled WLAN or for surv e ying a site wit hout a WLAN. The tool w orks with the existing tra nsmit po wer of the a ccess points, b ut all ...

  • Cisco Systems 7920 - page 38

    4-8 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 4 C onducting a WIP T Survey How To Surve y for the WIPT Figur e 4-6 AirMagnet Surv e y Activ e Mode T o survey a group of acc ess point s using the A ctive Mode tool, configur e the too l with an SSID that is configured on the access points. T o be gin the data colle cti ...

  • Cisco Systems 7920 - page 39

    4-9 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 4 Condu cting a WIPT Surv ey How To Survey for the WIPT Figur e 4-7 AirMagnet Client W alkabout When you selec t display mode on the bottom tool bar, SiteV iewer displays da ta collec ted during t he surve y . T w o new panels appear in this mode: th e Filter area in th ...

  • Cisco Systems 7920 - page 40

    4-10 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 4 C onducting a WIP T Survey How To Surve y for the WIPT Figur e 4-8 AirMagnet Sho win g Acce ss P o ints and Mer g ed Displ ay Figure 4-9 sh ows Site V iewer’ s four-p anel display . V ie w ing more than one surve y data type helps you comp are me asure ment factor s. ...

  • Cisco Systems 7920 - page 41

    4-11 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 4 Condu cting a WIPT Surv ey How To Survey for the WIPT Figur e 4-9 AirMagnet Four -P anel Displa y ...

  • Cisco Systems 7920 - page 42

    4-12 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 4 C onducting a WIP T Survey How To Surve y for the WIPT ...

  • Cisco Systems 7920 - page 43

    C HAPTER 5-1 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 5 Positioning Access Points and Ante nnas for Site Surveys When you perform a site surve y , it is important to position wire less equipmen t for opti mal co verage. This chap ter de scribe s best practic es for p osition ing access p oints and antennas. Access Point P ...

  • Cisco Systems 7920 - page 44

    5-2 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 5 Positioning Access Points and Antennas for Site Surveys Antenn as and Ant enna Posit ioning The access point in Figure 5- 2 provides b etter c overage beca use the re flecte d sig nal prod uces fewer nul ls and less multipa th than the I-beam pl acement. Ho we v er , be ...

  • Cisco Systems 7920 - page 45

    5-3 Site Sur vey Guide fo r Deployin g Cisco 792 0 IP Phones OL-6315-01 Chapter 5 Positioning Access Po ints and A ntennas f or Site Surve ys Ant ennas an d Ante nna Pos itioni ng Figure 5-4 shows a p atch ante nna mount ed on a wa ll. The ant enna cab les are ro uted ab ov e the sus pende d ceili ng and are attach ed to a hi dden acc ess poi nt. F ...

  • Cisco Systems 7920 - page 46

    5-4 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Chapter 5 Positioning Access Points and Antennas for Site Surveys Antenn as and Ant enna Posit ioning Figure 5-6 shows a pat ch ant enna m ounted o n a suspe nded cei ling. The cable s are h idden an d are routed abov e the cei ling to the access point. Figur e 5-6 P atc h Ant en ...

  • Cisco Systems 7920 - page 47

    A- 1 Site Sur vey Guide fo r Deploying C isco 7920 IP Pho nes OL-6315-01 APPEND IX A Additional Sources of Information This a ppendix lists docume nts th at provi de addit ional i nfor mation about si te su rveys: • Cisco W ir eless IP Phone 7 920 D eploym ent Rec ommendat ions http://www .cisco.com/e n/US/products/hw/phon es/ps379/prod ucts_whit ...

  • Cisco Systems 7920 - page 48

    A- 2 Site Survey Guid e for Depl oying Cisco 7920 IP Phones OL-6315-01 Appendix A Additional Sources of Information ...

Manufacturer Cisco Systems Category IP Phone

Documents that we receive from a manufacturer of a Cisco Systems 7920 can be divided into several groups. They are, among others:
- Cisco Systems technical drawings
- 7920 manuals
- Cisco Systems product data sheets
- information booklets
- or energy labels Cisco Systems 7920
All of them are important, but the most important information from the point of view of use of the device are in the user manual Cisco Systems 7920.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Cisco Systems 7920, service manual, brief instructions and user manuals Cisco Systems 7920. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Cisco Systems 7920.

Similar manuals

A complete manual for the device Cisco Systems 7920, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Cisco Systems 7920 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Cisco Systems 7920.

A complete Cisco Systems manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Cisco Systems 7920 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Cisco Systems 7920, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Cisco Systems 7920, that we can find in the current document
3. Tips how to use the basic functions of the device Cisco Systems 7920 - which should help us in our first steps of using Cisco Systems 7920
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Cisco Systems 7920
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Cisco Systems 7920 in a specific country, if it was not possible to solve the problem on our own.

Do you have a question concerning Cisco Systems 7920?

Use the form below

If you did not solve your problem by using a manual Cisco Systems 7920, ask a question using the form below. If a user had a similar problem with Cisco Systems 7920 it is likely that he will want to share the way to solve it.

Copy the text from the picture

Captcha
New picture

Comments (0)