Manuale d’uso / di manutenzione del prodotto MC509 CDMA LGA del fabbricante Huawei
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HUAWEI MC509 CDMA LGA Mo dule Hardware Guide Issue 01 Date 2011 - 04 - 08.
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HUA WEI MC509 CDM A LGA Module Hardware Guide About This Document Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA WEI MC509 CDM A LGA Module Hardware Guide About This Document Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA WEI MC509 CDM A LGA Module Hardware Guide Content Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 5 Content 1 Introduction.................................................................
HUA W EI MC509 CDM A LGA Module Hardware Guide Content Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 6 3.10 JT AG Interface ................................ ................................
HUA W EI MC509 CDM A LGA Module Hardware Guide Content Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 7 7.3 National Com pulsor y Certification ..............................................
HUA W EI MC509 CDM A LGA Module Hardware Guide Introduction Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Overall Description Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Overall Description Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Overall Description Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Overall Description Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 14 Ta bl e 3- 1 D ef ini ti on s of pi ns o n t he LG A in ter fa ce PIN No.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 17 PIN No. Pin Name I/O Descriptio n DC Characteri stics (V) Normal MUX Min Typical Max 55 GPIO - I/O General I/ O pins.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 18 PIN No. Pin Name I/O Descriptio n DC Characteri stics (V) Normal MUX Min Typical Max 77 UART_RING GPIO O UART Rin g Indicator -0.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 20 PIN No. Pin Name I/O Descriptio n DC Characteri stics (V) Normal MUX Min Typical Max 108 GND - - GND - - - 109 GPIO - I/O General I/ O pins.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 22 Fi gu r e 3- 1 B ot to m v ie w o f s equence o f LG A i nt er fa ce pi ns 3.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 23 T able 3- 2 l ists the definitio ns of the pins on the powe r supply inter face.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 25 Ta bl e 3- 4 C oin c ell c har ac te ri st ic s Parameter Specificati ons HB -414 ML-series Nominal v oltage 3V 3V Nominal ca pacity 0.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 26 Through the O utput Powe r Supply interface, the M C 509 modul e can supp ly 2.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 27 It is recommended that use resistance of 0ohm in the DTE to isolate signals transmitted from above pins in T able 3- 5 3.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 28 Figure 3- 3 sh ows the con nections of t he PO WER_ON_OFF an d RESIN_N p ins.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 29 Ta bl e 3- 6 P ow er on t imi ng Parameter Comments Time(Nomi nal values) Units T P ON PO W ER_ON _OFF turn on time.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 31 Fi gu r e 3- 6 C on ne ct io n s of t he WA KE UP_ IN and W AK EUP _O UT p in s 3.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 32 Ta bl e 3- 8 U AR T in te rf ac e si gna ls Pin No.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 34 The USB interface is powered directly from the 3.3 V supply .
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 38 The two aud io I/O chan nels are comp letely dif ferent and t hus hav e good perfor mance of resisting RF interfer ences.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 41 3.10 JTAG Interface LGA MC509 module prov ides one JT AG interface (Joint T est Action Group).
HUA W EI MC509 CDM A LGA Module Hardware Guide Description of the Application In terfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 42 Ta bl e 3- 13 S ig na ls o n RF Ant en na in t er fa ce Pin No .
错误!未知的文档属性 名称 Hardware Guide RF S pecif ications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide RF S pecif ications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide RF S pecif ications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide RF S pecif ications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 46 expression o f S1 1. S1 1 rel ates to the ant enna ef f iciency . S1 1 can be measur ed with a vector analy zer .
错误!未知的文档属性 名称 Hardware Guide RF S pecif ications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide RF S pecif ications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide Electrical and Reliabi lity Features Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide Electrical and Reliabi lity Features Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 50 5.3 Working and Storage Temperatures and Humidity T able 5- 2 l ists the working and storage te mperatures and humidity for the MC509 module.
错误!未知的文档属性 名称 Hardware Guide Electrical and Reliabi lity Features Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 51 Parameter Descriptio n Minimum Val ue Maximum Val ue Unit I OL Low -level o utput current -1.
错误!未知的文档属性 名称 Hardware Guide Electrical and Reliabi lity Features Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 52 5.5.2 Power Consu mption The power consumptions of MC509 in dif ferent scen arios are respe ctively listed in T able 5- 6 .
错误!未知的文档属性 名称 Hardware Guide Electrical and Reliabi lity Features Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide Electrical and Reliabi lity Features Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 54 5.7 EMC and ESD Features EMC test s have to be per formed on the a pplication as soon as possible to det ect any potential pro blems.
错误!未知的文档属性 名称 Hardware Guide Mechanical S pecifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide Mechanical S pecifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide Mechanical S pecifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
错误!未知的文档属性 名称 Hardware Guide Mechanical S pecifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 58 Fi gu r e 6- 3 N am e pl at e The picture mentioned above is only for reference.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 62 specified in t he agree ment s are responsi ble for recycling the teleco mmunicat ion product s.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 65 FCC regulat ions, as p art of fe deral laws, are divided into sev eral p arts.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 67 wireless prod ucts req uire ty pe approval (mainly for t he RF part) by Japan T elecom b efore enter ing Japa nese market.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 68 YYY YYYYY YYY YYYYY is the uniqu e product num ber (UPN) co nsi sting o f up to e ight capital letters in English and/or di gits.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 69 License number Equipment type Scrambling code The follow ing figure sh ows t he anti-counterfeit ing measures of NAL marks.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 70 xxxxCPxxxx xxxx before the letters CP is four Arabic numerals, i ndicating the year of issue of the certific ate.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 74 system approv ed by all members t o ensure that the t erminals meet n etwork deployment requireme nts.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 75 7.4.2 PTCRB Ce rtification The PTC RB require ments are certification st andards in N orth America.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 76 Overall-S ystem GCF Certification Huawei modules p ass the GCF certification before b eing release d to the mar ket.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 77 the GCF and the PTC RB. Therefore, the test organiz ations are able to provide high quality and high e ffic iency test services and are widely recognized by operators.
HUA W EI MC509 CDM A LGA Module Hardware Guide Certifications Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 78 T erminal manufactur ers who app ly for the P TCRB cert ification o f the terminal s to be integrated w ith Huawei modules must acco mplish t he following t asks: 1.
HUA W EI MC509 CDM A LGA Module Hardware Guide Safety Inform ation Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 79 8 Safety Informa tion Read the sa fety informati on careful ly to ensure t he correct and safe use o f your wireless dev ice.
HUA W EI MC509 CDM A LGA Module Hardware Guide Safety Inform ation Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Safety Inform ation Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 81 8.10 Laws and Regulations Observance Observe law s and regu lations when u sing your w ireless devic e.
HUA W EI MC509 CDM A LGA Module Hardware Guide Safety Inform ation Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co., Ltd. 82 8.14 Regulatory Information The follow ing approval s and noti ces apply in sp ecific regions as not ed.
HUA W EI MC509 CDM A LGA Module Hardware Guide Appendix A Circ uit of T ypical Interfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Appendix A Circ uit of T ypical Interfaces Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Appendix B Acro nyms and A bbreviations Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
HUA W EI MC509 CDM A LGA Module Hardware Guide Appendix B Acro nyms and A bbreviations Issue 01 (201 1- 04 - 08 ) Huawei Proprietar y and Confidential Copyright © Huawei Techn ologies Co.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Huawei MC509 CDMA LGA è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Huawei MC509 CDMA LGA - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Huawei MC509 CDMA LGA imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Huawei MC509 CDMA LGA ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Huawei MC509 CDMA LGA, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Huawei MC509 CDMA LGA.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Huawei MC509 CDMA LGA. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Huawei MC509 CDMA LGA insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.