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OCTOBER, 2000 NEC America, Inc. NDA-24313 ISSUE 1 STOCK # 200817 Wireless Features and Specifica tions ®.
LIABILITY DISCLAIMER NEC America, I nc. reserves t he right to chan ge the specific ations, funct ions, or features, at any time, without no ti ce. NEC America, Inc. has prepared this document for use by its employees and customers. The informati on contained herein i s the propert y of NEC America, Inc.
ISSU E 1 ISSUE 2 I SSUE 3 ISSUE 4 DATE OCTOBER, 2000 DATE DATE DATE ISSU E 5 ISSUE 6 I SSUE 7 ISSUE 8 DATE DATE DATE DATE NEAX2400 IPX Wireless F eatures an d Speci fication s Re visi on Sh ee t 1 /1 NDA-2431 3 PA G E N o .
NDA-24313 ISSUE 1 OCTOBER, 2 000 NEAX 2 4 0 0 I P X Wir ele ss Fe atu r es an d S pe cif ica tio n s Fe atur e Lis t Pa g e NE AX 2400 I P X Wir e le ss F e atur e s an d Spe ci fic ati on s NDA-24 31 3, I s su e 1 Page i Wire less Specifi cation in NEAX2400 IPX .
NEA X24 00 IP X W ire les s Fe at ure s an d Spe ci fic a tio ns Page i i ND A- 24 313 , I ssue 1 This page is f or your note s..
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 1 Wir e le ss Sp ec i fi ca ti on i n N EAX 24 00 IP X Wi rele ss Spec ificat ion in NE AX240 0 IPX • ZT .
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Page 2 ND A-2 4313 , I ssu e 1 Wir e le ss Sp ec i fi ca ti on i n N EAX 24 00 IP X The following figure s hows zone setting . Ser vice Conditio ns Below ar e some of t he conditi ons f o r the use of t he Built-in Wireless system (IPX).
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 3 Wir e le ss Fe at ure s Wi reless F eat ures FEATURE NA ME REMARKS Dynamic Radio Channel Control R-50 * R.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Page 4 ND A-2 4313 , I ssu e 1 Wir e le ss Fe at ure s Peg Counts (per four tr ansc eivers): Number of c all origina tions att e mpted Number .
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 5 General Serv ice Feature s Gen eral S ervice Feat ures Index Featur e Name Series 730 0 Se ries 7400 Stan.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Page 6 ND A-2 4313 , I ssu e 1 General Serv ice Feature s A-60 Attend ant -to- Attenda nt Ca lling — — — — — — — — A-17 Audibl.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 7 General Serv ice Feature s B-10 Brokerage Hot L ine - CC IS — X — — — → —— B-12 Brokerage H.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Page 8 ND A-2 4313 , I ssu e 1 General Serv ice Feature s C-3 Call Forwa rdin g - Don’t Answer X X X Note 14 X →→ → Note 14 → C-4 7 .
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 9 General Serv ice Feature s C-97 Call Pickup - Group - PRI X X X Note 15 X Note 15 →→ → Note 15 → .
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 10 ND A-2 4313 , I ssu e 1 General Serv ice Feature s C-10 3 Calli ng Party R e c ognitio n Service (Call Forwar ding - All Call s/Bus y.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 1 1 General Serv ice Feature s D-36 Data Call Number Displ ay — — — — — — — — D-37 Data Cal.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 12 ND A-2 4313 , I ssu e 1 General Serv ice Feature s D-117 Data Line Sec uri ty - P RI — — — — — — — — D - 6 7 D a t a .
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 13 General Serv ice Feature s D-7 Direct-In Term ination (DIT) — X Note 6 — X Note 6 — → Note 6 —.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 14 ND A-2 4313 , I ssu e 1 General Serv ice Feature s E-26 E xpanded Mul tip le L ine Opera tio n - D term ———— F-6 Faul ty Trun.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 15 General Serv ice Feature s I-7D I-Hold I ndication - D term ————— —— — I-8D I-Use Indica.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 16 ND A-2 4313 , I ssu e 1 General Serv ice Feature s L-6 L ast Numb er Ca ll — Note 8 — Note 8 — Note 8 — Note 8 — Note 8 —.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 17 General Serv ice Feature s M-31 Man ual Di sconne ction of Da ta Ca ll — — — — — — — — M.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 18 ND A-2 4313 , I ssu e 1 General Serv ice Feature s M-75 Multipl e Ca ll F orwa rdi ng - Al l Calls - PRI XXXX → →→→ M-24 Mult.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 19 General Serv ice Feature s N-46 Number Portabili ty - CCIS — — — — O-6 Off-Hook Al arm — — .
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 20 ND A-2 4313 , I ssu e 1 General Serv ice Feature s P-39 PRI Trunk to Tie L ine Conne ction wit h Pad C ontrol ————— ——.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 21 General Serv ice Feature s S - 5 2 S e r i a l C a l l - C C I S ————— ——— S-127 Seri al.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 22 ND A-2 4313 , I ssu e 1 General Serv ice Feature s S - 3 S p e e d C a l l i n g - S y s t e m ————— ——— S-3D Speed C.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 23 General Serv ice Feature s T- 1 Tande m Swit ching of Tie Tr unks - 2/4- Wire ————— —— —.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 24 ND A-2 4313 , I ssu e 1 General Serv ice Feature s Note 1: Automated At tendant: Termina ting side is PS • When the PS is Out of Zone ( Out of Ar ea or in POWER OFF st ate) , the c al ling part y e ncounters Busy Tone, but call t erminatio n is not retr ie d.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 25 General Serv ice Feature s • T hi s se rv ic e canno t be us ed w ith the C entral Office line (DIRECT IN TERM INATION) or a call via the Attendan t Consol e.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 26 ND A-2 4313 , I ssu e 1 Note 13: Tie Line S tep C all is not availa ble f rom PS. Step call from a PS to the Att e ndant Console is not availa ble. Note 14: In a FCCS netw ork, CALL FORWARDING dest inati on station from a PS must have a telephone number.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 27 Radio Cha nnel Changeover R-50 R-50 Radio Channel Change over General Des cription This s ervice supervi ses an d co ntrols (ch ange over) t he channel automatically to avoid int erference a n d to maint a in speec h qu ality.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 28 ND A-2 4313 , I ssu e 1 S-130 Sp ee ch Sc ram bl in g S-13 0 Speech Scr ambling General Des cription This s e rvice pr ot ects calls from be ing tapped. Oper atin g Pr ocedur e No manual operati on is requir ed.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 29 Out Of Cell Indication O-38 O-38 Out Of Cel l Indicati on General Des cription When t h e D term P S ser.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 30 ND A-2 4313 , I ssu e 1 A- 13 1 Aut omati c Rel e as e - Ou t O f Cel l Cal l s A-131 Automatic Rele ase - Out Of Cell Calls General .
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 31 PS A ut henti cati on P-61 P-61 PS Auth enticat ion General Des cription This se rv i ce confir ms the ident i ty of the D term PS t o avo i d an una ut h or i ze d te rmi nal from acce s s ing the system .
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 32 ND A-2 4313 , I ssu e 1 P-62 PS Location Registrat ion P-62 PS Location Registration General Des cription This servi ce allows the NEAX2400 I PX to supervise the location of each D term P S se r i es upon receiv ing the location regist r ation re quest, to allow call t ermina tion.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 33 Overla p Dialing O-39 O-39 Over lap Dialing General Des cription Th is se r vic e a llo w s t h e D ter m P S series user to receive a Dial Tone and to dial the d esir ed number to or iginat e a ca ll.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 34 ND A-2 4313 , I ssu e 1 P-6 3 Pr es et D ia li n g P-63 Preset D ialing General Des cription This s e rvice al lows the D te rm PS s eries user to co nfirm the n umb ers to be diale d be fore orig inating calls.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 35 Individua l PS Calling I-39 I-39 Indiv idual PS C alling General Des cription This servi ce allow s th e c alling p arty to call the individua l D term PS se r ie s.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 36 ND A-2 4313 , I ssu e 1 H-23 Handover H-23 Hand over General Des cription When spee ch tr ansmission qua lity be comes inferio r, the.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 37 DTMF Signal Sender D-154 D-154 DTMF Signal Sender General Des cription Th is s erv ice allo ws th e D term PS se rie s u ser to se nd the P B signal ( tone) to the called party ( term inal, voice mail syste m, etc.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 38 ND A-2 4313 , I ssu e 1 C-156 Consultatio n Hold C-156 Consultation Hold General Des cription This s e rvice al lows the D te rm P S user t o p lace a call on hold. Onl y t hat D term PS us er can retr ieve t he held call .
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 39 Flexible P S Numbering F-34 F-34 Flexible PS Number ing General Des cription Each D term PS s eries is assigne d an unique number. Oper atin g Pr ocedur e No manual operati on i s re quire d.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 40 ND A-2 4313 , I ssu e 1 P-64 PS S ervic e C lass P-64 PS Servic e Cla ss P-65 PS Rest ricti on C lass General Des cription This se rvic e permits all the D term PS serie s to be assi gned a class of ser vic e in acc orda nce with the de gree of the syste m use desire d.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 41 PS-to-Stat ion Calli ng P-66 P-66 PS-to- Station Calling General Des cription This s e rvice al lows the D te rm PS seri es u ser to place a c all to a P BX stat ion, and v ice v ers a.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 42 ND A-2 4313 , I ssu e 1 S-131 St ack D iali ng - S ta tion S-13 1 Stac k Dialin g - Sta tion General Des cription This se rvic e allows the D term PS se rie s user t o store the last five numbe rs diale d and to redial the num bers by pressin g the REDIAL/PAUSE or F3 k ey.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 43 Spee d C al l ing - St ation S-1 32 S-13 2 Spe ed Cal ling - St at ion General Des cription This s ervice allows t he D term PS ser ies us er t o d i al certain frequent ly called num bers usin g 2-digit a bbreviated c all codes.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 44 ND A-2 4313 , I ssu e 1 A-128 Automati c Annou ncement - Disconnected PS Out Of Zone A-128 Automatic Announce ment - Di sconnect ed P.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 45 Automatic Announc ement - Calle d PS Out of Zone A -129 A-129 Automatic Announceme nt - C alled PS Out o.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 46 ND A-2 4313 , I ssu e 1 C-155 Call Forw arding P S Incoming Call I ncomplete Ser vi ce Cond iti o ns (co nt ’ d) 9.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 47 D term PSII Tw o Line Op eration D-155 D-155 D term PS II Tw o Line Opera tion General Des cription This fe atur e allows for the appearance o f two lines on the li ne ( L1 and L2) k eys of the PS.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 48 ND A-2 4313 , I ssu e 1 N-43 Name Displa y - Intra-Node Call N-43 Na me Display - Intra- Node Call General Des cription This fea ture a llows a PS to indicate user infor mation correspon ding to the calling Phy sical Station Number while engage d i n a s tation-to-st ation call .
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 49 Name Displa y - Intra-Node Call - CCIS N-44 N-44 Name Displa y - Intra-Node Call - CCIS General Des cription Between C CIS nodes this feature al l ows t he callin g o r c alled party i nforma t ion to be displaye d on the LCD of a PS.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 50 ND A-2 4313 , I ssu e 1 N-45 Number Sharing N-45 Numb er Sh aring General Des cription This feature allo ws t he D te r m us er to use a PS as a S ub St atio n. I n t his featu re, the D term a nd PS are r efe rred as Mai n Station and Sub S tation, r espe ctively.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 51 Number Sharing N-45 Ser vi ce Cond iti o ns (co nt ’ d) 9. Whe n this fe ature i s set while a call is terminating to Main St a tion, the call i s not tr ansferr e d to Sub Sta tion.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 52 ND A-2 4313 , I ssu e 1 V-24 Voice Mai l Indication (V MI) V-2 4 Voice Mail In d ication ( VMI) General Des cription This f ea ture a llows the syste m to not ify a PS that a v o ice mail has been rece ived.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 53 Wirele ss Analog Adjunct Conne ction W-8 W-8 W ireless Analog Adjunct Connection General Des cription This feat ure allows the existing PBX (no wirel ess function) to operate a PS as well as a s tation in the office.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 54 ND A-2 4313 , I ssu e 1 W-8 Wire less Ana log Adjunct Conne ction Ser vi ce Cond iti o ns (co nt ’ d) 11. When a call termi nates to the PS us ing this feature , the call ing numbe r is n o t displ ayed on t he PS.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 55 ISDN Roaming I-41 I-41 ISDN Roaming General Des cription This feat ure allows PS to move to another PBX which has a d ifferen t SYS-ID via Q.931a connecti on.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 56 ND A-2 4313 , I ssu e 1 I-41 ISDN Ro aming Ser vi ce Cond iti o ns (cont ’d) 13. A PS can move t o a ny node o f the FCCS network tha t has a dif ferent S YS-ID, on th e condition that a Q.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 57 Call Forwardi ng - Dropped Calls C-161 C-161 Call Fo rwarding - Dropped Calls General Des cription This .
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 58 ND A-2 4313 , I ssu e 1 C-161 Ca ll Forwarding - Droppe d Calls Ser vi ce Cond iti o ns (co nt ’ d) 5.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 59 Call Forwardi ng - Dropped Calls C-161 Inter action s 1.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 60 ND A-2 4313 , I ssu e 1 I-40 ISDN Dat a C om mu n ic ation s - 32 kbps I-40 IS DN D ata Communica tio n s - 32 kbps General Des cript.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 61 ISDN Dat a C om mu n ic ation s - 32 kbps I-40 General Des cription Bearer Cap ability Between the P BX and ZT, t he follo wing messa ge convers ion is perfor med: 1.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 62 ND A-2 4313 , I ssu e 1 I-40 ISDN Dat a C om mu n ic ation s - 32 kbps Oper atin g Pr ocedur e Use the ATD command for data sendi ng (origi nation) and the ATA command for answe ring. Ser vice Conditio ns Con ditio ns bet we en PBX and Z T 1.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 63 Authori zation Code - D ter m PSII A-1 37 A-137 Authoriza tion Code - D term PSI I General Des cription .
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 64 ND A-2 4313 , I ssu e 1 C-166 Call Park - D te rm PS II C-166 Cal l Park - D term PSI I General Des cription This f eatu re enable s a PS use r to “Park” a ca ll (C.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 65 Call Park - D te rm PS II C- 16 6 Ser vice Conditio ns 1. Thi s fea tur e is also avail abl e for Sub L ine (L2) of a two-li ne D term PS (by usi ng Two-L ine Operat ion).
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 66 ND A-2 4313 , I ssu e 1 G-23 Group Call - Automati c Confe rence (20-Par ty) G-23 Gr oup Call - Automatic Confe rence ( 20-Party) Gen.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 67 Group Call - Automati c Confe rence (20-Par ty) G-23 Ser vi ce Cond iti o ns (co nt ’ d) 8.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 68 ND A-2 4313 , I ssu e 1 S-13 4 Short Text Me ssaging Servic e (STM Service) S-13 4 S hor t Text Me ssa g ing Se rvic e (STM Se rvi ce.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 69 Short Text Me ssaging Service (STM Serv ice) S-134 Ser vi ce Cond iti o ns (co nt ’ d) 10. Hardware Req uirements: P S a nd ZT t hat a re both suppo rting this featur e s hould be used .
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 70 ND A-2 4313 , I ssu e 1 This page is f or your note s..
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 71 Movement of PS i n NEAX2400 IPX Movement of PS in NEAX2400 IPX PCS Co mm unity The SYS-I D is a uniqu e ID which wa s given i n order to m anage th e PCS syst em.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 72 ND A-2 4313 , I ssu e 1 Movement of PS i n NEAX2400 IPX MOVE T O MOVE F ROM A, B HOME NODE HOME PCN C, D OTHER NODE HOME PCN E, F H O.
NE AX 2400 I P X W ire le ss Fea t ures and S pec ifi ca ti on s ND A-2 4313 , I ssue 1 Page 73 Movement of PS i n NEAX2400 IPX Note: This patt e rn is treated as Roaming b y re-Roaming to the home node in FCCS -I.
NEAX240 0 IPX Wirel ess Fe atu re s and S pecific atio ns Pa ge 74 ND A-2 4313 , I ssu e 1 This page is f or your note s..
An important point after buying a device NEC nec (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought NEC nec yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data NEC nec - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, NEC nec you will learn all the available features of the product, as well as information on its operation. The information that you get NEC nec will certainly help you make a decision on the purchase.
If you already are a holder of NEC nec, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime NEC nec.
However, one of the most important roles played by the user manual is to help in solving problems with NEC nec. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device NEC nec along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center