GatewayメーカーG800の使用説明書/サービス説明書
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Gatewa y Se ries G100 / G200 / G 400 / G 800 Ad minis tr ato r Man ual 601-0 0020 Rev. B.
Digi um , In c. 445 Jan Davi s Drive Hunt svil le, AL 35806 United S tat es Main Num ber: +1 (256 )-428- 6000 T ech Suppor t: +1 (256 )-428-6161 U.S. T oll F ree: +1 (877 )- 344- 4861 Sales: +1 (256)-428- 6262 ww w .dig iu m. c om www .ast erisk. org www .
Compliance In f ormation Complian ce inf ormation for thi s product is available at http:// www .digium.c om/complianc e . Digi um, Inc . Page 3.
Intr oducti on to Gateway Series Documentati on This m anual c ontains product information f or t he Gateway S eries appli ances. Be sure to refer to any supple mentary docu ments or re lease notes that were shi ppe d with you r equi pment.
Symbol Def i nitions Ca ution s tateme nts in dic ate a c ondit io n wher e d amage to the un it o r its conf igurat ion c ould oc cur if o perat ional pr oced ur es ar e not foll owed. T o r educe the risk of dama ge or i njury , foll ow all steps or pr ocedur es a s in struct ed.
Impo rtant Safet y Instruct ions Serv ici ng. Do not atte mpt to servic e this unit. Ther e ar e no use r -se rvicea ble part s i nside. R efer serv icing to q ualifi ed servi c e personne l. Batteries. The b atter ies in the uni t are n ot user -serv iceable.
T ABLE O F C ONTEN T S Chapter 1 Overv iew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Ec h o-Can cellat ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Chapter 2 Unit In stalla tion .
Table Of Content s Appendix A Pin Assi gnments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Appendix B Spe cifi c ati ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 7 Appendix C Glo ssary an d Acronyms .
List of Fi gures Figu re 1: TDM P BX to VoIP Sc e nari o . . . . . . . . . . . . . . . . . . . 13 Figu re 2: VoI P PBX t o TDM Sc enari o . . . . . . . . . . . . . . . . . . . 13 Figure 3 : TDM PBX to TDM and VoIP Scenario . . . . . . . . . . . 14 Figu re 4: G100 Si ngle P o rt A pplia nce .
Li s t of T a b l e s Ta b le 1: G atewa y Seri es Models . . . . . . . . . . . . . . . . . . . . . . 23 Table A-1: Gigabit Et hernet P ort Pin outs . . . . . . . . . . . . . . . . . . 85 Table A-2: RJ45 T1/E1 Port Co nnec tor . . . . . . . . . . . . .
Chapter 1 Ov ervi ew Digium' s Gat eway Series is a conver ged media gateway produc t line design ed to interf ace betwe en TDM (T1/E1) and IP networks (SIP). The Gateway Serie s connects lega cy tele phone system s t o IP networks an d seamlessl y integr ates V oIP PBXs with the PSTN.
Chapter 1: O vervi ew Supp o rted V o ice M ode s : PRI CPE and PRI NET (T1 / E1) – Nation a l ISDN 1 / NI1 – Nation a l ISDN 2 / NI2 – Euro IS DN – 4ESS (A T&T) – 5ESS (Lucent ) – DMS100 – Q.
Chapter 1: O vervi ew Figure 1: TDM PBX to V oIP Scenario Fig u r e 2 : V o I P PB X to T D M Scen a rio Digium, Inc. Page 13.
Chapter 1: O vervi ew Figure 3: TDM PBX to TDM and V oIP Scenario Digium, Inc. Page 14.
Chapter 1: O vervi ew Echo-Cancel lation Administ rators connect ing the ir Gatewa y Series appliances to th e PSTN or other devic es are likel y to be placi ng calls tha t will r esult, at some point, in an u nba lanced 4 - wire/2-wir e hy brid. The result of this hybrid is the refle ction of a near - end echo to the calli ng party .
Chapter 2 Unit Ins ta llation This c hapter provid es the f ollowing inform a tion: Unp ack in g th e U ni t on page 1 7 Shi pm en t In spec ti o n on pa ge 1 8 Front P an el Ide nti fic a.
Ch ap t er 2 : U nit I n sta lla t ion Unpacking the Uni t When you unpack you r unit, caref ully inspe ct it for any damag e that m ay have occur red in shipment. If damage is sus pected, fil e a claim with the carrie r and contact the rese lle r from which the unit was purc has ed.
Ch ap t er 2 : U nit I n sta lla t ion Shipment Inspe ction The following it e ms are includ ed in shipment of a Gateway Series appli ance: Gateway Serie s applianc e Power cord with attached .
Ch ap t er 2 : U nit I n sta lla t ion Front Panel Identi ficat io n This se ction descr ibes t he component s on the front pa nel of the Gateway Series models . USB Re covery T1/E 1 Gigabit Status Et hern et Devic e Status Et hern et Statu s T1 / E1 Por t Figure 4: G100 Single P ort Applianc e Digium, Inc.
Ch ap t er 2 : U nit I n sta lla t ion USB Recover y T1/E 1 Gi gabit Status Eth erne t De vice Statu s Ethern et T1/E1 Status Port Figure 5: G200 Dual Port Appliance Digium, Inc.
Ch ap t er 2 : U nit I n sta lla t ion USB Recover y T1/E1 Gi gabit Status Rese t Eth ern et De vice Statu s Ethe rnet T1/E1 Status Po rt Figure 6: G800 Oct al Port Appliance Device S tatus - This LED corre sponds to the status of the Gate way Ser ies ap pli an ce.
Ch ap t er 2 : U nit I n sta lla t ion Eth e rn et S tat us - The se LEDs correspond to the status of the Etherne t connect ion. S ee Fre quently Asked Question s on p age 80 fo r more inform ation. USB Recove ry - Th is po rt can be use d to pe rform a fi rm ware re co very and conf igurati on reset.
Ch ap t er 2 : U nit I n sta lla t ion Unit Iden ti fication The defini ng char acteristi c of the Gateway Series models a re the number of T1/E1 and Etherne t ports supporte d.
Ch ap t er 2 : U nit I n sta lla t ion Hardwa re Inst allation This s e ctio n descr ibe s how t o properly install the har dware for a Ga teway Ser ies ap pli an ce. Cautio n Only qual ified ser vice per so nnel sho uld co ntinue with har dwar e inst all ation and confi guration of th e Gateway Se r ies appli ance.
Ch ap t er 2 : U nit I n sta lla t ion appli ance. Double crim p the ground r ing te rminal to the wire. Next, sl ide the ground ring ter minal over the ground lug. Then fasten the ground rin g termin al to the ground lug using the gro und nut. The groun d nut must be turned c lockwis e to tigh te n it onto th e groun d lug.
Ch ap t er 2 : U nit I n sta lla t ion Moun ti ng The include d hardwa re allows the Gateway Serie s ap pliance to be wall mounted, rack mount ed side-by- side with a nother Ga teway Serie s appli ance, or placed flat on a leve l surfa ce.
Ch ap t er 2 : U nit I n sta lla t ion Imp orta n t If the Gat eway Seri e s appli anc e is insta lled in a syste m t hat is in t ur n insta lled in a clos ed or multi -unit r ack ass e mbly , the oper at ing ambient temperat ur e of the r a c k envi r onment may be si gnific antly gr eater than th e r oom ambient .
Ch ap t er 2 : U nit I n sta lla t ion Si de- by-s ide R ack Mo u nt: In order to rac k mount the Gatewa y Series a ppliance si de-by-sid e with another Gatewa y Series appliance, place one of the short mounting brackets on the f r ont of the lef t s ide of t he fir st Ga teway S eries appl iance.
Ch ap t er 2 : U nit I n sta lla t ion Figure 7: Side-by-side Rack M ountin g Wa l l M o u n t : In order to wall mount the Gate way Series appliance, the short mountin g brackets sho uld be flipped an d rotate d, and fastened on the middle o f the right and left si de s of the Gateway Series applianc e as s hown in Figur e 8 on page 30.
Ch ap t er 2 : U nit I n sta lla t ion If the Gateway Ser ies applian ce is pla ced in the “right side down” orienta tion, the 2 re maining #8 black t russ hea d mounting sc rews s hould be full y inserted int o the scre w hole s ne ar the front of t he right si de of the Gateway Serie s applianc e.
Ch ap t er 2 : U nit I n sta lla t ion Lev el S urf ac e: In or de r to place the G atew a y S eri es a pp lianc e f la t o n a lev el s urfa ce, th e rubber fe et should be adhered to the 4 corners of the botto m of the Gateway Serie s applianc e. Thi s will he lp secure the Gateway Ser ie s appl ia nce to t he surfa ce i t is pla ced on.
Ch ap t er 2 : U nit I n sta lla t ion Conn ect in g P ort s A descript ion of each of the front panel c onne ctors on a Gateway Series appli ance i s availa ble in the se ction title d Front Pa nel Iden ti fica tio n on page 19. Please refer t o that se ction to dete rmine wh at shou ld be connect ed to each connector .
Ch ap t er 2 : U nit I n sta lla t ion Connecti ng to t he Gateway Series The Gate way Se ries we b GUI may be acc essed by e ither its DHC P or stat ically a ssigne d IP a ddress. The foll owing browsers are supported: Wind ows XP , Vi sta, 7: Chrome 8.
Ch ap t er 2 : U nit I n sta lla t ion Gateway Series a pplianc e. The default userna me for t he Gateway Series we b GUI is ad min , and the default passwor d is adm in .
Ch ap t er 2 : U nit I n sta lla t ion connect yo ur Gateway Series appl ia nce to your computer so that the Gateway Serie s web GUI may be accessed from you r comput er . Network s e ttings for c omputer connect ing to Ga teway Se ries IP: 192. 168.69.
Ch ap t er 2 : U nit I n sta lla t ion IP Configurat ion The g eneral ne tworki ng and configurat ion se rver o ptions in the Gateway Series we b GUI s hould be con figured before othe r s. The I P conf igurati on menus f or t he G100 and G200 models di ffer f rom those of the G400 and G400 models.
Ch ap t er 2 : U nit I n sta lla t ion The Gener al N etw or ki ng O p ti ons for the G100 and G200 m odels ar e descr ibed below . Hostn a me - Specify th e hostname of the Gate wa y Series a ppli a nce. I f a ho stname i s specif ied, t he G x 00- aa - bb - cc hostna me will no longer be conf igured.
Ch ap t er 2 : U nit I n sta lla t ion DNS Ad dresses - If Ob tai n an IP Address via DHCP is disabled, specif y up to 3 DNS servers to be used by the Gateway Serie s app li- ance .
Ch ap t er 2 : U nit I n sta lla t ion tftp , ftp , o r h ttp . Th e Gate w ay Seri es app lia n ce will r eq ues t a configur ation da tabase with the filena me of xxxxxxxxxxxx.t gz, where xxxxxxxxxxxx is the unit’ s firs t MAC a ddress, f r om the confi gur ati on server.
Ch ap t er 2 : U nit I n sta lla t ion Figure 10: IP Conf iguration Menu for G400 / G800 The Gener al N etw or ki ng O p ti ons for the G400 and G800 m odels ar e descr ibed below . Hostn a me - Specify th e hostname of the Gate wa y Series a ppli a nce.
Ch ap t er 2 : U nit I n sta lla t ion Also Con tinue Usi n g Defau lt Install IP Addr e ss - Leaving thi s option e nabl ed will a llow the Gateway Se ries a ppliance t o listen f or network r equests on it s factor y defau lt IP addr ess.
Ch ap t er 2 : U nit I n sta lla t ion GUI as de scri bed in Ba ckup s on p age 73, a nd place t he backup file on the configur ation ser ver at the path describe d be low . Note: The format of the path to the configur ation ser ver is pr otocol: // [user:pas sw or d@]hostname_or_ ip[/path] .
Ch ap t er 2 : U nit I n sta lla t ion Conf igu ra ti on Ser v er - If Obtain an IP Address via DHCP is enab le d on a n Inter face t a b a nd G et Config Server fr om Option 66 via DHCP is disabl ed, the path to the config uration serve r may be stat ically define d using t his option.
Ch ap t er 2 : U nit I n sta lla t ion HTTPS (e.g. https :// [I P] ) must be used. If you do not c onnect usin g HTTPS, a browser err or wil l be displayed. Network Mask - If Obt ain an IP Address via DH CP is d isab led, specif y the network m ask for the Gatewa y Series applianc e.
Chapter 3 Co nfig urat ion The Gate way Se ries a ppliance s have a va riety of configurati on options . This ch apter provide s info rmat ion on how to use the Gateway S erie s web GUI t o configur e an a pplianc e witho ut the ne ed of c ommand-lin e tool s and an over view of the available configu r ation s e ctions.
Chapter 3: Configur at ion The Gateway Seri es appliance sho uld al ready be connected to your network or computer , as described in Co nn ectin g to th e Ga te way S eries on page 33. Using a Gateway Ser ie s suppor ted web browser , open a browser window a nd en ter the IP addr ess for the Gatewa y Series appli ance us ing HTTPS ( e.
Chapter 3: Configur at ion It is highl y recommended t hat the admin password be changed usin g the Syste m Ad m ini stra tors menu on the web GUI. In additi on, it is hi ghly recommende d t hat th e sof tware on a Gateway S eries appli ance be u pdated to the latest ve rsion be fore proceedin g with c onfigura tion.
Chapter 3: Configur at ion The Gateway Ser ies web GUI is div ide d into the follo w ing main sec tions . Setti ngs an d C onfi gur a tion on page 49 Logging a n d Report ing on page 65 S tatus and Diagnost ics on page 66 Maintenance on pa ge 72 Figure 12: Main M enu Digium, Inc.
Chapter 3: Configur at ion Setti ngs and Confi guration This se ction provi des the a bilit y to c onfigure S IP and TDM setti ngs, create call routing gr oups and r ules , manage system admi nistrator s, and set up network ing. Include d are th e followi ng sectio ns.
Chapter 3: Configur at ion SIP En dpo i n ts This section pr ovides the abi lit y to add and m odif y SIP endpoint s, and configur e call , medi a , and fax se ttings. A SIP endpoint wil l typicall y be a SIP PBX or SIP provider connec ted to the Gateway Serie s appl iance.
Chapter 3: Configur at ion – DTMF Mode – T ru st R em ote -Part y-ID – Sen d Remo t e- Par ty-I D – Cal ler I D Presenta tio n – Pro gress Inband – All ow Overla p Diali ng – Append user=phone t o URI – Add Q.
Chapter 3: Configur at ion – G .726 – G .729 – GSM – Codec Prior it y – ALA W Packetization Rate – ULA W Packetization Rate – GSM Pac k etiz at ion Rat e – G .722 Packetiz a tion Rate – G .726 Packetiz a tion Rate – G .726 Nonstand ard – G .
Chapter 3: Configur at ion Global S IP Set tings This se ction provi des the a bilit y to a dd and mo dify gl obal SI P setti ngs. Thes e set ting s ar e f or ex pe ri enced adm inis trat ors on ly . P leas e tak e care when modifyi ng any of these se ttings.
Chapter 3: Configur at ion – Sen d Com p act H ead e rs – SDP Owner – Dis allowed S IP Methods – Shrin k C al ler ID – Maximum Regis tration Expir y – Minimu m R egist ratio n Expiry – D.
Chapter 3: Configur at ion – UDPTL F EC Span – Use On ly Even Numb ered Por ts Digium, Inc. Page 55.
Chapter 3: Configur at ion T1/E 1 This se ction provi des the a bilit y to c onfigure the T1/E1 hardware i n the Gateway Serie s applianc e. Inc lude d are the follo wing secti ons. Gene ra l - Ge nera l options f or T1/E1 configurati on. The following set- tings a re avai lab le.
Chapter 3: Configur at ion – PRI D ial Plan fo r Dia lin g Num b er – Inte r national Pre fix – Nation a l Prefix – Local Pre fi x – P ri v at e Pre fix – Unkno w n Pref ix – Networ k Sp.
Chapter 3: Configur at ion – Conne ct Acknowle dge - T313 – Answer on P olarity Switch – Hangup on Polar ity S witch – Pola rity on Answer Delay – Pre- W ink T ime – W ink Ti m e – Start Time – Rece ive r W ink Ti m e – Pre-F la sh Time – Flash T ime – Rece ive r Flash T ime – De-Bounc e T iming Digium, Inc.
Chapter 3: Configur at ion Call Rou ting G roups This se ction provi des the a bilit y to a dd and mo dify SI P and T1/ E1 call routi ng grou ps. A call r outin g group allows a group of channe ls to be addres sed when creating a cal l rout ing rule. The followi ng set tings are avail abl e.
Chapter 3: Configur at ion Call Rou ting Ru les This se ction provi des the a bilit y to a dd and mo dify ca ll r outing r ules. A call rou ting rule deter min es how a call is handl ed based upon certai n charac teristic s suc h as inbou nd channe l and DID.
Chapter 3: Configur at ion Syste m Ad m ini stra tors This se ction provi des the abili ty to add and mod ify syst em administr a tors for a ccess to the Gatewa y Series web GUI. The following settings a re avail abl e. Full Name Username Email Addr ess Passw ord Passwor d Confir mation Language Digium, Inc.
Chapter 3: Configur at ion IP Configurat ion This se ction provi des the a bilit y to c onfigure IP opt ions f or the Ga teway Seri es ap pl ianc e. See IP C onf ig ura ti on on pa ge 36 for more infor mation.
Chapter 3: Configur at ion HTTP S This secti on pr ovide s the ability t o supply your own certi fi cate for secur e connect ion to the Gatewa y Series web GUI. A self-si gned cert ificate is provid ed by de fault . The following set tings are avai la ble.
Chapter 3: Configur at ion Access Contr ol This se ction provi des the a bilit y to li m it ac cess to the web GUI and SI P traf fic thr ough the Gateway Seri es applia nce. All other proto c ols are blocked. The fo llowing sett ings are avail abl e. Rule Nam e Network Allow Adm in W eb Int e rface Allow S IP Digium, Inc.
Chapter 3: Configur at ion Logging and Report ing This se ction provi des the a bilit y to c onfigure a nd vie w syste m statis tics and loggin g of the Gateway Serie s applianc e.
Chapter 3: Configur at ion Status and Diagno sti cs This se ction provi des the a bilit y to vi e w connecti on status, syste m inform ation, perform a dvanced debugging , and tr oubles hoot pr oblems with diagn ostic tools . Included are the fol lowing sections.
Chapter 3: Configur at ion Conn ect ion S tatus This secti on pr ovide s the ability t o view the connec tion stat us of network interf aces, SIP endpoints , a nd T1/E1 inte rfa c es.
Chapter 3: Configur at ion System Informat ion This se ction provi des the a bilit y to vi e w system informati on on t he Gateway Series a pplianc e, incl uding mod el number , sof tware version, MAC addre sses, uptime, system t im e, and system temper ature.
Chapter 3: Configur at ion Diagnostic T ests This se ction provi des the a bilit y to te st the operation of the Gate way Series a pplianc e. For example, the loopback test will r un a pattern l oop test to ver ify the integrit y of a T1/E1 port. See Chapter 4— “T roub leshooti ng” for more det ails.
Chapter 3: Configur at ion Advanced Debu ggin g This se ction provi des the a bilit y to r ecord a nd down load debug logs for troubl eshooti ng. Included are the fol lowing sections .
Chapter 3: Configur at ion T e chn ic al Su pp o rt This se ction provi des the a bilit y to e nable re mote acc ess for Digium Support Per sonnel to acces s the Gateway Ser ie s appl iance for support purpos es. The followi ng set tings are avail abl e.
Chapter 3: Configur at ion Maintenanc e This se ction provi des the a bilit y to pe rform conf iguration backups, perfo rm syste m updates, set the syste m c lock, reboot , and restore fa cto ry sett ings.
Chapter 3: Configur at ion Bac ku ps This se ction provi des the a bilit y to c reate and restore a bac kup. Inc luded are the fol lowing sections. Download Backup - Downlo ad a bac kup in d a tabase f ormat Note: At least one confi gur at ion change must be made before a backup c an b e genera ted and downloaded.
Chapter 3: Configur at ion Softwar e Updates This se ction provi des the a bilit y to pe rform a s oftware u pdate f or the Gateway Serie s applianc e.
Chapter 3: Configur at ion Syst e m C lo ck This se ction provi des the a bilit y to se t the system clock on the Gat eway Series ap pliance and to sync it aga inst a networ k time server . The foll owing setting s are avai la ble. T im ezone T im e Set Method Manuall y Set t he Date a nd T ime NTP Se rv er Digium, Inc.
Chapter 3: Configur at ion Syst e m R e set This se ction provi des the a bilit y to pe rform a s ystem rebo ot, sys tem shutdown, or fac tory reset of the Gat eway Ser ies appliance . A system shutdown will dr op all cur rent calls a nd cause th e Ga teway Series ap pliance to become unre acha ble by any method except phys ical acces s.
Chapter 4 T r ou bles hoo ti ng This c hapter provid es infor mation re garding troubleshoot ing tools , frequ ently asked questio ns, and possibl e resoluti ons as identi f ied by Digium T echnical Suppor t. Multiple res ources are availa ble to obtain more infor mation about Aster isk an d Digium produc ts.
Chapter 4: T roublesho oting Firmwar e Recovery and Configurat ion Reset If a Gatewa y Seri es applia nce is behaving unexpectedl y or the pass w ord is f or gotten, a fi rmware re covery may need to be performed. The USB Recover y port can be used to per form a f irmware recovery using a reco very im ag e.
Chapter 4: T roublesho oting Next, power o ff the Gateway Series a ppliance. Note: For ha rdware re visions A3 and ear lier , t he Gateway S eries appli ance must remain power ed of f for 60 se conds in or der to guaran tee proper star tup. S e e the label on the bac k of the Gatewa y Series ap pliance to dete rmine t he hardware revisi on.
Chapter 4: T roublesho oting Frequent ly Asked Q uesti ons Wha t do t he col o rs of th e De vi ce S tatu s LE D in di ca te? St e a d y R e d - Hardware is init ia lizing. Blink i ng R e d - A soft ware pac kage is being evaluate d f or validity .
Chapter 4: T roublesho oting What typ e of c able d o I nee d for t he T1/E1 p or ts on a G ateway S eries appl iance? A straight- through RJ45 T1/E1 c able is needed for connectin g to the RJ45 ports on a Gateway Serie s applianc e when connec ting to the PSTN.
Chapter 4: T roublesho oting The Gate way Se ries GUI password ca n be reset t o its default without modifying a ny configu r atio n sett ings by followin g the steps de scri be d below . 1. Press the reset switc h once. 2. Th e statu s LE D w ill start fl ash ing am be r .
Chapter 4: T roublesho oting Where ca n I fi nd an s wers t o add i tion al qu estio ns? Digium T echnical Suppor t (+1 256-428-61 61) , or T oll Free in the U.S. (+1 877-344- 4861), is availa ble 7am-8pm Centra l T ime (GMT - 6), Mond a y - Fri day .
Chapter 4: T roublesho oting Free I nstall ation Support Digium hardwar e products include fre e installa tio n support. I n order t o receive th is suppor t, regis ter your Digiu m product u sing t he se rial number locate d on t he serial ization label of your Di gium unit .
Appendix A Pin Assi gnments All RJ45 (8P8C) ports labeled ETH on the Ga teway Series appliance are 8-pin. The pin as signments ar e identified i n T able A-1. Note: Category 5e or Category 6 cabl es are required fo r Gigabit (1Gbps) ope ration up to 100 meters.
Appendix A: Pin Assignment s All RJ45 (8P8C) ports labeled T1/ E 1 on the Ga teway Seri es appliance are 8-pin. RJ45 jacks are also commonly referred to as RJ48 when us ed for telecommunication.
Appendix B S pecification s This appendix pr ovides specifications, r equired environmental conditions, and maximum power c onsumption for the Ga teway Series appliances. Physical ( All Units). Size: 8.6” × 9.0” × 1. 72” (21.84 x 22. 86 x 4.37 cm) W eight: 2 lbs 12 oz ( 1,247.
Appendix B: Specif i cati ons Power: For G100/G200, 10W ma ximum, 7.5W typical. For G400/ G800, 15W m aximum, 12W typical. Digi um, Inc. Page 88.
App end ix C Gl oss ary and A cro nyms 8P8C 8 position 8 conductor Module connec tor commonly used to termina te t w iste d pair . ANSI American Na tional S t and ards Institute An or gani zation whi c h propose s an d establi shes standards for interna tional communica tions.
Appendix C: Glossary and Acr onyms bps bits per second A measurement of tr ansmission spe ed across a data connecti on. BRI Bas ic R at e I SDN br oad ban d Broadband tr ansmission sha res the bandwidth of a parti c ular medium (coppe r or f iber o ptic) to int e grate m ultiple signa ls.
Appendix C: Glossary and Acr onyms CLEC Com petitive Lo cal Ex change Carrier A term for teleph one companies esta blish e d after the T elecommunicat ions Act of 19 96 deregulated t he LECs. CLECs c ompete with IL E Cs to o ffer loca l serv ice. S ee al so LEC a nd IL EC .
Appendix C: Glossary and Acr onyms DS1 Digital S i gnal, Level 1 1.544 Mbps in North Ameri ca (T1) an d Japan (J 1) -up to 24 voice channel s (DS0s) , 2.048 Mbps in Europe (E1) - up to 32 voice channels (DS0s). DS1/T1 /E1 lines are part of the PSTN. DS3 Digital S i gnal, Level 3 T3 in North America and Japa n, E3 in Europ e.
Appendix C: Glossary and Acr onyms FXO Foreign Exchan ge Office Receive s the ringi ng volta ge from an FXS device. Outside l ines are connect ed to FXO ports. FXS Foreign Exchan ge St ation Init iates a nd sen ds rin ging volt age. P hones are connect ed to FXS por ts.
Appendix C: Glossary and Acr onyms HDLC High -Level D ata Link Co ntrol A bit-orie nted synchr onous data link layer prot oc ol developed by the Inter national Organiza tion for S tandardi zation ( ISO). IA X Inter-A steri sk eXchange The native V oIP protocol used by Asterisk.
Appendix C: Glossary and Acr onyms LED Light-emitting Di ode Linu x A robust, fe at ure-pack ed open sour ce operating sys te m ba sed on Unix that remai ns freely availa ble on the internet. It boa sts dependa bilit y and offers a w id e rang e of co mpa tibi lity wi th ha rd ware an d so ftw are .
Appendix C: Glossary and Acr onyms NT Network T ermination A device connecti ng the customer' s te lephone or data equipm ent t o the local I SDN excha nge carr ier's line . NT devic es ar e conne cted to TE device s. PBX Pr ivate Branch Exchang e A smaller versio n of a phone company’ s large central switc hing of fice.
Appendix C: Glossary and Acr onyms PRI Pr im ar y R a te I S D N PSTN Public Switch ed T elephone Net work A communi cations ne twork whic h use s tel ephones t o establish connect ions between two poin ts.
Appendix C: Glossary and Acr onyms RJ1 1 A six- pin ja ck typi cally used for c onne cting telephone s, m odems, and fa x machines in resi de ntia l and busi ness settings to P BX or the local telephone CO. RJ45 8P8C, un-k eyed modul ar connector type for Ethe rnet over twiste d pai r .
Appendix C: Glossary and Acr onyms TDM Time D iv is ion M u lt iple x er A device that suppor ts simultan eous transmissi on of multipl e data streams into a singl e high-speed dat a stre am. TDM c ombines sign als by interle aving bit s one aft er the ot her .
Appendix C: Glossary and Acr onyms V Vo l t s Vo I P V oice over Internet Pr otocol T ec hnology used for tra nsmi tting voice tr af fic over a data network using the Inte rnet Protoco l.
デバイスGateway G800の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Gateway G800をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはGateway G800の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Gateway G800の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Gateway G800で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Gateway G800を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はGateway G800の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Gateway G800に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちGateway G800デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
