ADC H2TU-C-388 инструкция обслуживания

HiGain HiGain U SER M ANUAL MODE SEL SETUP ST A TUS RS DCE 232 HiGain HDSL2 H 2 T U • 3 8 8 1 L H2TU-C-388 List 1 Line Unit Part N umber: 15 0-2406-0 1 CLEI: VACHKW0C[...]

152-388-10 0-02, Issue 2 ii June 6, 200 0 H2TU-C-3 88 List 1 Revision History of This Manual Copyright Jaun ary 18, 2002 © 2002 ADC DSL Systems, Inc. All rights reserved. Tradem ark Information ADC is a registered trademark of ADC T elecommunicati ons, Inc. Hi Gain is a registere d trademark of ADC DSL Systems , Inc. No right, lic ense, or interes[...]

152-388-10 0-02, Issue 2 Using This Manual H2TU-C-3 88 List 1 June 6, 2000 iii U SING T HIS M ANUAL The following conven tions are used in this manual: • Monospace type indicates screen text. • Keys you pres s are indicated by small icons such as or . Key combinations to be pressed simultaneously are in dicated with a plus sign as follows: + . [...]

Inspecting Sh ipment 152-388-10 0-02, Issue 2 iv June 6, 200 0 H2TU-C-3 88 List 1[...]

152- 388-1 00-02, Issu e 2 Tabl e of C ontent s H2TU-C-3 88 List 1 June 6, 2000 v T ABLE OF C ONTENTS Overview _ _________ ___________ ___________ _________ ___________ ___________ ___________ __ 1 Features ............. ................. ....................... ...................... ................. ....................... .... .................[...]

Table of Content s 152-388-10 0-02, Issue 2 vi June 6, 200 0 H2TU-C-388 List 1 Test ing _______ ____________ ________ ___________ _________ ___________ ___________ ________ 3 6 Front-Panel System Alarms.................... ...................... ................. ....................... .................... .. ..... 36 Alarm Option for DLC Feed ...[...]

152-388-10 0-02, Issue 2 List of Figu res H2TU-C-3 88 List 1 June 6, 2000 vii L IST OF F IGURES 1. H2T U-C-388 List 1 Front Panel ..................... ....................... ...................... ................. ............. .......... .......... 3 2. In stalling the H2TU-C-388 into a Shelf ............... ...................... .............[...]

Lis t of Ta bles 152- 388-1 00-02, Issu e 2 viii June 6, 200 0 H2TU-C-3 88 List 1 L IST OF T ABLES 1. Front-Panel Description .............. ....................... ................. ...................... ....................... ... ................... ....... 4 2. Front-Panel Display Messages ............... ....................... ..............[...]

152-388-10 0-02, Issue 2 Overview H2TU-C-3 88 List 1 June 6, 2000 1 O VERVIEW The HiGain ® product family fr om ADC ® is the industry ’ s first practical implementations o f High- bit-rate Digital Subscriber Line 2 (HDSL2 ). ADC products are f ully compliant with the HDS L2 standard. Providing full-rate T1 access using just a sing le copper pai[...]

Overvi ew 152- 388-100- 02, Is sue 2 2 June 6, 2000 H2TU-C-3 88 List 1 C OMPATIBILITY The H2TU-C-388 L ist 1 is designed to mount in DDM+ high-den sity shelves. For a list of compatible shelves see “ Appendix C - Compatib ility ” on pag e 53 . A PPLICATIONS HiGain systems pr ovide a cost-effective, easy-to-deploy method for delivering DS1 High [...]

152-388-10 0-02, Issue 2 Front Pa nel H2TU-C-3 88 List 1 June 6, 2000 3 F RON T P ANEL Figure 1 shows the H2TU -C-38 8 List 1 f ron t panel. Table 1 on page 4 describes the front-pan el components. For a list of front-panel display mes sages, refer to Table 2 on page 5 . For pinout diagrams of the H2TU-C card-edge connector and craft p ort, refer t[...]

Fron t Pane l 152- 388-1 00-02, Issue 2 4 June 6, 2000 H2TU-C-3 88 List 1 Table 1. Front-Panel Description Front-Pa nel Feature Functi on Front- pa nel displ ay Displa ys four-character status , provisio ning, and alarm syste m messages. The fr ont-panel di splay illum inates whe n power is initially applied. To cons erve pow er the disp lay only r[...]

152-388-10 0-02, Issue 2 Front Pa nel H2TU-C-3 88 List 1 June 6, 2000 5 Table 2 lists the fro nt-panel display mes sages. The four-char acter display reports the code of an alarm, loop back, or diagnostic message and, in some cases, is followed by a second four-character messag e that modifies the first message with a value or curren t conf igur at[...]

Fron t Pane l 152- 388-1 00-02, Issue 2 6 June 6, 2000 H2TU-C-3 88 List 1 SMJK R em ote SmartJac k Loopback DSX-1 sign al is looped b ack to th e netwo rk at th e H2TU-R SmartJack module. DIAGN OSTIC MESSAGE S A = xx Maxi mu m Loop At tenuat io n The Attenuati on (A) message app ears f ollowed by xx , wher e xx is the loop at tenuatio n, measur ed [...]

152-388-10 0-02, Issue 2 Installation H2TU-C-3 88 List 1 June 6, 2000 7 I NSTA LLA TION Figu re 2. Installing th e H2TU -C-388 into a Shelf 1 Align the H2TU-C-388 List 1 with the enclosure slot guides, then push the un it in until it touches the backplane card- edge connector. 2 Press down on the H2TU-C -388 front panel to properly seat it. Upon re[...]

Installation 152-388-10 0-02, Issue 2 8 June 6, 2000 H2TU-C-3 88 List 1 V ERIFICATION Once the H2TU-C-388 List 1 is installed, verify that it is operating properly. To do this, monitor the following: • Status LED • Status mes sages reported by the front-panel display (see Tabl e 2 on page 5 ) Verification without a Downstream Device If there is[...]

152- 388-1 00-02, Issu e 2 Prov isio ning H2TU-C-3 88 List 1 June 6, 2000 9 P ROVISIONING There are two pro visioning methods: • Use the MODE and SEL buttons on the front panel of the H2TU-C to: – Set system optio ns – Reset the H2TU-C to its factor y de fault s ettings for system optio ns – Display sy stem opti on setting s (scroll mo de) [...]

Provisio nin g 152-388-100-02, Issue 2 10 June 6, 200 0 H2TU-C-3 88 List 1 Resetting to Factory Default Values All user options f or the H2TU- C-388 List 1 ( Tabl e 5 on p age 17 ) can be se t to the factory default v alues using the MODE and SEL buttons. To set the user options to their default values: 1 Press the SEL button for 6 seconds until th[...]

152- 388-1 00-02, Issu e 2 Prov isio ning H2TU-C-3 88 List 1 June 6, 2000 11 5 Configure the maintenance ter mi nal to th e following communication settings : • 9600 bau d • No parity • 8 data bits • 1 stop bit • Hardware flow cont rol to OFF 6 If necessa ry, press + to refresh the HiGain HDSL2 logon screen. The Logon Screen The HiGain ma[...]

Provisio nin g 152-388-100-02, Issue 2 12 June 6, 200 0 H2TU-C-3 88 List 1 Figure 3. Logon Sc reen Table 4. Logon Scr een Menus Press this ke y: To access thi s menu: Menu Fu nc ti ons Monitor Monitors l oopbacks and alarms, an d provide s a graphical re presentat ion of circui t activ ity , in cl ud ing ES, UAS, SES , an d lin e cod e. Perfor manc[...]

152- 388-1 00-02, Issu e 2 Prov isio ning H2TU-C-3 88 List 1 June 6, 2000 13 P ROVISIONING T ASKS After the HiGain Line Unit is s uccessfully installed, perform these b asic provisioning tasks: 1 Set the date and time (see “ Setting Date and Time ” on this page) 2 Set the circuit ID number s (see “ Settin g Circuit ID Numbers ” on page 14 )[...]

Provisio nin g 152-388-100-02, Issue 2 14 June 6, 200 0 H2TU-C-3 88 List 1 Setting Circuit ID Numbers The Inventory screen provides p roduct information on all uni ts in the system and allows settin g of the circuit and unit identification nu mbers. Figur e 5. Inventory Menu 1 Type to select the Inventory screen. 2 Type the Circuit ID number, then [...]

152- 388-1 00-02, Issu e 2 Prov isio ning H2TU-C-3 88 List 1 June 6, 2000 15 Configuring the System The Confi g menu ( Figur e 6 ) allows you to make th e following types of sys tem configuration chang es: • Standard o ptions ( Figu re 7 on page 16 ) • ADC options ( Figu r e 8 on p age 16 ) • Date and time (see “ Setting Date and Time ” o[...]

Provisio nin g 152-388-100-02, Issue 2 16 June 6, 200 0 H2TU-C-3 88 List 1 Figur e 7. C onfi gurat i o n Menu - Sta ndard Option s (Def ault s S how n) Figure 8. Con figuration Menu - ADC Optio ns (Defaults Shown) M onitor P erformanc e E vent Log C onfig I nventory R log on H elp +------- ---------------+ | Standa rd Options -> | +-------------[...]

152- 388-1 00-02, Issu e 2 Prov isio ning H2TU-C-3 88 List 1 June 6, 2000 17 Table 5 describ es the S tandard Config s creen option s and li sts thei r front -panel d isplay c odes. Table 6 on page 18 describes the ADC Config screen options. Selectio ns in bold typeface are the factory default settings. Table 5. HiGain Line Un it List 1 Standard Co[...]

Provisio nin g 152-388-100-02, Issue 2 18 June 6, 200 0 H2TU-C-3 88 List 1 H2TU- R TL OS Loopback TLOS ENA En ables a lo gic loopb ack at the H2T U-R when an LO S occurs at i ts DS1 inpu t. See Figure 2 5 on page 38 for LO S/AIS response priorities. DIS Disables T LOS logic loo pb ack. Netw ork Loopback Patt ern NLBP AIS Enables the H2TU-R t o tran[...]

152- 388-1 00-02, Issu e 2 Prov isio ning H2TU-C-3 88 List 1 June 6, 2000 19 HDSL2 BER Threshold (HBER) Option. The HBER option permits monitori ng of loop in tegrity and reporting of alarms when excessive errors are detected. The PM primitive used for this purpose is the CR C checksum perf ormed on th e HDSL2 frame for bo th directions o f transmi[...]

Provisio nin g 152-388-100-02, Issue 2 20 June 6, 200 0 H2TU-C-3 88 List 1 DS1 BER (DBER) Option. The DS1 BER alarm occurs when any of the DS1 or DSX-1 per formance monitoring parameter s lis ted in Table 7 excee d the counts shown for the 2 4-hour period be tween 12:00:00 AM throug h 11:59: 59 PM . These thr eshol ds corr espond to a 10 -6 BER. Al[...]

152- 388-1 00-02, Issu e 2 Prov isio ning H2TU-C-3 88 List 1 June 6, 2000 21 Cleari ng the Hi story, Alarm, an d Event Log Sc reens Clear the History , Alarm and Event Log screens after the system has been ins talled and is functioning prop erly. This remove s miscellaneous data acquired durin g the startup session and en sures collection of accura[...]

Monitoring Sy ste m Ac tivity and Pe rfo rm anc e 152-388-10 0-02, Issue 2 22 June 6, 200 0 H2TU-C-3 88 List 1 M ONIT ORING S YSTEM A CTIVITY AND P ERFORMAN CE The H2TU-C-388 List 1 provides tw o sets of maintenance screens for monito ring system activity and asses sin g performance. • The Monitor screens provide a graphical represen tatio n of c[...]

152-388-10 0-02, Issue 2 Monito rin g Syst em Activity and P erform an ce H2TU-C-3 88 List 1 June 6, 2000 23 3 To initiate a loopdown of all active loopbacks, press the to select LPDN , then press or . When prompted with the message: Are you sure (Y/N)? , press to initiate the lo opdown or to cancel. Table 8. Mo ni tor Sc reen De scrip tions Field [...]

Monitoring Sy ste m Ac tivity and Pe rfo rm anc e 152-388-10 0-02, Issue 2 24 June 6, 200 0 H2TU-C-3 88 List 1 U SING THE P ERFORMANCE S CREENS TO V IEW P ERFORMANCE D ATA The Performance screens display: • CRC statistics for the HDSL2 o r DS1 interface in 31-day, 48- hour, 25-hour, and current history rep orts • Alarm statistics for the HDSL2 [...]

152-388-10 0-02, Issue 2 Monito rin g Syst em Activity and P erform an ce H2TU-C-3 88 List 1 June 6, 2000 25 Figure 13. H2TU-R DS1 48- Hour Perfor m ance History Figur e 14. H 2TU-C DS1 25- Hour Perf orma nce H isto ry M onitor P erformance E vent Log C onfig I nventory R logon H elp H2TU-R DS-1 48 Hour History (Page 1 of 4) -----------------------[...]

Monitoring Sy ste m Ac tivity and Pe rfo rm anc e 152-388-10 0-02, Issue 2 26 June 6, 200 0 H2TU-C-3 88 List 1 Examples of curr ent statistics screens are shown below. Figure 15 and Figur e 16 show statistics f or the DS1 interface at the remo te unit and line unit, resp ectively. These screens report 1-day, 1-hour, and 15-minute statistics. Figure[...]

152-388-10 0-02, Issue 2 Monito rin g Syst em Activity and P erform an ce H2TU-C-3 88 List 1 June 6, 2000 27 Table 9. Acronyms Used on the DS1 Performance History Screens Error Acr onym Descripti on Error Acronym De scription CV-L Co de Viol ation - Li ne Total BP V count. SES-P Severely Errored Second s - Path Second s with SES or CRC(ESF ) ≥ 32[...]

Monitoring Sy ste m Ac tivity and Pe rfo rm anc e 152-388-10 0-02, Issue 2 28 June 6, 200 0 H2TU-C-3 88 List 1 Performanc e History at the HDSL2 Interf ace The HDSL2 interface has 31-day, 48- hou r, 25 -ho ur, and curren t statistic screens for the H2TU-C . Figure 17 and Figur e 18 below are examples of 31-day an d 48-hour perfo rmance history scre[...]

152-388-10 0-02, Issue 2 Monito rin g Syst em Activity and P erform an ce H2TU-C-3 88 List 1 June 6, 2000 29 Figure 19. H2TU-C HDSL2 25-Hour Performance History Figure 20. H2TU-C HDSL2 Curr ent Statistics M onitor P erformance E vent L og C onfig I nve ntory R logon H elp H2TU-C HDSL2 25 Hour History (Page 1 of 9) --------------------- ------------[...]

Monitoring Sy ste m Ac tivity and Pe rfo rm anc e 152-388-10 0-02, Issue 2 30 June 6, 200 0 H2TU-C-3 88 List 1 U SING THE P ERFORMANCE S CREENS TO V IEW A LARM D ATA To access the alarm h istory screens: 1 Type to select the Performance s creen. 2 Press the to select an interface ( H2TU-C DS1, H2TU-R DS1, H2TU-C HDSL2 or H2TU-R HDSL 2 ), t hen pres[...]

152-388-10 0-02, Issue 2 Monito rin g Syst em Activity and P erform an ce H2TU-C-3 88 List 1 June 6, 2000 31 Alarm Hist ory at the DS 1 Interface The Alarm History screen reports DS1 statistics for the H2TU-C ( F igure 21 ) and the H2TU-R ( Figure 22 on page 31 ) on a continuous basis. The types of alarms reported are describe d in Table 11 on page[...]

Monitoring Sy ste m Ac tivity and Pe rfo rm anc e 152-388-10 0-02, Issue 2 32 June 6, 200 0 H2TU-C-3 88 List 1 Table 11. DS1 Alarm Descrip tio ns Scre en Alarm Front-Pa nel Alarm Descriptio n H2TU-C DS 1 ALARMS ( Figure 21 on p age 31 ) LLOS (a) (a) Issues a minor alarm (sent to the management unit or the backplane), if enabled. LLOS Local Loss of [...]

152-388-10 0-02, Issue 2 Monito rin g Syst em Activity and P erform an ce H2TU-C-3 88 List 1 June 6, 2000 33 Alarm Histor y at the HDS L2 Interfa ce Figu re 23 sho w s th e H2TU-C HDSL2 alarm h istory, a n d Table 12 describes the alarms . Figur e 23. H2 TU-C HDSL2 Alarm History Screen Table 12. HDSL2 Ala rm Descriptions Screen Alarm Front- Panel A[...]

Monitoring Sy ste m Ac tivity and Pe rfo rm anc e 152-388-10 0-02, Issue 2 34 June 6, 200 0 H2TU-C-3 88 List 1 U SING THE E VENT L OG TO T RACK S YSTE M E VENTS To view a runn ing log of system events, p ress to select the Event L og. The Event Log displays the date and time of the 100 most recent events (most recent displayed first) and provides a[...]

152-388-10 0-02, Issue 2 Monito rin g Syst em Activity and P erform an ce H2TU-C-3 88 List 1 June 6, 2000 35 Table 13. Event Log Entry Messages List Event Lo g Message s Any DS1 Alarm History reset Any DS1 PM regi ster reset Any HDSL2 Ala rm Hist ory reset Any HDSL2 PM regi ster reset Any Lo op Down ( any segme nt) Any Lo op Up (an y segmen t) Any [...]

Testing 152-388-10 0-02, Issue 2 36 June 6, 200 0 H2TU-C-3 88 List 1 T ESTING This section prov ides information about fro nt-panel system alarms, LOS and AIS respon se, OCT55 test procedure, and loopback testing. F RONT -P ANEL S YSTEM A LARMS Table 14 summarizes all possible HiGain system alarms in order of priority as they appear on the front pa[...]

152-388-10 0-02, Issue 2 Testing H2TU-C-3 88 List 1 June 6, 2000 37 Alarm Option for DLC Feed To improve HiGain compatibility with the switch-to-protect features used in DLC feeder applications, the H2TU-C-388 List 1 has an Alarm Pattern (ALMP) option that allows you to select either an AIS or LOS DS1 output p ayload for the f ollowing alarms: • [...]

Testing 152-388-10 0-02, Issue 2 38 June 6, 200 0 H2TU-C-3 88 List 1 Remote LOS and AIS Response Figur e 25 shows the different ways t he H2TU-R can respond to th e network, depending on th e configuration of the TLOS, NLBP, RDA, and ALMP configuration options descr ib ed in T able 5 on pa ge 17 and Table 6 on page 18 . Figur e 25. H2TU-R LOS and A[...]

152-388-10 0-02, Issue 2 Testing H2TU-C-3 88 List 1 June 6, 2000 39 L OOPBACK O PERATION HiGain has a family of loopback options fo r analyzing circuit functionality. The loopback signal is transm it ted and returned to the sendin g device for comparison. This allo ws you to verify the integrity of the HDSL2 channels to the H2TU-C, the H2TU-C DSX-1[...]

Testing 152-388-10 0-02, Issue 2 40 June 6, 200 0 H2TU-C-3 88 List 1 Table 1 5. Sum mary of HiGain Loopback Codes an d Activation Methods Metho d of Activ a tion Loopba ck Code Description Te st Set Craft Port MODE/SEL NLOC 1111000 4-in-7 D SX-1 signal is looped bac k to the network at the H2TU-C. X X X NREM 1110000 3-in-7 D SX-1 si gnal is looped [...]

152-388-10 0-02, Issue 2 Testing H2TU-C-3 88 List 1 June 6, 2000 41 Special Loopback Commands In additio n to the GNLB loopback command mod e, a HiGain system can be configu red for one of f ive special loopback co mmand modes. These are s elected from the maintenan ce terminal System Settings screen (see Table 5 on pa ge 17 ) or by using the MODE [...]

Testing 152-388-10 0-02, Issue 2 42 June 6, 200 0 H2TU-C-3 88 List 1 Manual Loopback Session A manual loopba ck session allows you to select any o ne of the HiGain loopbacks listed in Table 15 on pag e 40 with the exception of SmartJack loopbacks, which can on ly be issued by inband comm ands. Setting the Loopback Time-out Opti on Before initiating[...]

152-388-10 0-02, Issue 2 Testing H2TU-C-3 88 List 1 June 6, 2000 43 4 Press SEL to activate the selected loopback. The previous loopb ack is terminated. Once a loopback is selected and activated, the loopback stays activ e until it times out (based on the LBTO setting). When a loopback times out, th e display then returns to the normal display m od[...]

Testing 152-388-10 0-02, Issue 2 44 June 6, 200 0 H2TU-C-3 88 List 1 4 Have the CO tester sen d the NLOC (4-in-7) inband loopup for 5 second s. You should be able to observe the NLOC message on the front-panel display. (Th e Status LED on the front pan el should be yellow, and the loopback mo de should also be identified on the Span Status screen. [...]

152-388-10 0-02, Issue 2 Testing H2TU-C-3 88 List 1 June 6, 2000 45 A1LB, A2LB, and A 5LB Test Procedures Using the codes listed in Table 16 , a network tester can activate NLOC, NRG or NREM loopbacks (or SMJK, if enabled). A tester at the customer prem ises can activate CLOC, CRG, or CREM loopbacks. All loopbacks sho wn in Table 16 can also be ini[...]

Testing 152-388-10 0-02, Issue 2 46 June 6, 200 0 H2TU-C-3 88 List 1 4 Once armed, the H2T U-C-388 can be looped b ack by sending Intelligent Office R epeater (IOR) LPBK activation code 1101-001 1-1101-0011 ( D3D3) for at least 5 seconds. Y ou should o bserve the follow ing activation respons e pattern in the order presented: a 2 sec onds of A IS ([...]

152-388-10 0-02, Issue 2 Testing H2TU-C-3 88 List 1 June 6, 2000 47 A3LB and A4LB Test Procedures The H2TU-C-3 88 can b e looped back by sending the Ad dressable Office R epeater (AOR) LPBK activation cod e 1111-11 11- 000 1-1 110 (FF1E) for at least 5 seconds. This ca use s the H2TU-C-38 8 to enter the NLOC state. The Loopback Time-out s etting (s[...]

Appendi x A - Specificati ons 152-388-10 0-02, Issue 2 48 June 6, 200 0 H2TU-C-3 88 List 1 A PPENDIX A - S PECIFIC ATIONS Power Line V oltage 0, -1 85 Vdc CO S upply -48 Vdc no minal (-42.5 Vdc t o -56. 5 Vdc) (See “ Power Consu mption ” and “ M aximum Powe r Dissipa tion ” and “ Max imum Current Drain ” on pa ge 49 .) Electrica l Prote[...]

152-388 -10 0-02, Issue 2 Append i x A - Spec if ic at io ns H2TU-C-3 88 List 1 June 6, 2000 49 P OWER C ONSUMPTION The maximum po wer con sumption and h eat dis sipation dep ends upon the type o f rem ote un its in the system and the CPE power setting. The three mos t important po wer parameters of an H2TU-C are its maximum power consumpt i on, it[...]

Appendi x A - Specificati ons 152-388-10 0-02, Issue 2 50 June 6, 200 0 H2TU-C-3 88 List 1 L OOP A TTENUATION Each loop has no more than 35 dB of loss at 196 kHz, with driving and ter minating impedan ces of 135 Ω (see Table 19 bel ow) . H I G AIN L INE U NIT C ARD -E DGE C ONNECTOR Figur e 28 shows the card-edge connectors o n the HiGain Line Un[...]

152-388 -10 0-02, Issue 2 Append i x A - Spec if ic at io ns H2TU-C-3 88 List 1 June 6, 2000 51 Fuse Alarm Pin 117 on the card-edge connector is a fuse alarm that is driven to -48 Vdc through a diode whenever its onboard fuse opens. C RAFT P ORT Figur e 29 shows the craft port adapter and its connection to a DB-9 or DB -25 connector on a maintenan [...]

Appendi x B - Fun ct io nal O pera tion 152-388-100-02, Issue 2 52 June 6, 200 0 H2TU-C-3 88 List 1 A PPENDIX B - F UNCTI ONAL O PERA TION ADC HDSL2 techno logy provides full- duplex services at standard DS1 rates over copper wires be tween an H2TU-C and an H2TU-R, which comprise one HiGain system. HiGain systems use ADC Overlapped PAM Transmi ssio[...]

152-388-10 0-02, Issue 2 Append ix C - Com p atibility H2TU-C-3 88 List 1 June 6, 2000 53 A PPENDIX C - C OMPATIBILITY The HiGain system us es HDSL2 transmission technology as recommended by ANSI committee in compliance with the August 1999 T1-E1.4/99-0 06R5 HDSL2 stand ards. The H2TU-C-388 List 1 is compatible with t he following DDM+ high-density[...]

Appendi x D - Pro duct Suppo rt 152-388-10 0-02, Issue 2 54 June 6, 200 0 H2TU-C-3 88 List 1 A PPENDIX D - P RODUC T S UPPORT ADC Customer Service Gro up provides expert pre-sales and post-sales support and training for all its products. Technical support is available 24 hours a day, 7 days a week by co ntacting the ADC Technical Assistance Center [...]

152-388-10 0-02, Issue 2 Appen di x E - Abbrevi at io ns H2TU-C-3 88 List 1 June 6, 2000 55 A PPENDIX E - A BBREVI ATIONS A ACO: Alar m Cu toff AIS: Alarm In dication Signa l ALM: Alar m AMI : Alternate Mark Inversion AWG : American Wire Gau ge B B8ZS: Bipo lar with 8-Zero Su bstitution B8ZSS: B8 ZS Monit o red Seco nds BER: Bit Error Rate BPV: Bi [...]

Appendi x E - Abbrevia ti ons 152-388 -10 0-02, Issue 2 56 June 6, 200 0 H2TU-C-3 88 List 1 SES-P: Severel y Erro red Seconds - Path SF: SuperFrame SMJK : SmarkJack SPL B: Special Loopback T TLOS : Transmi t Loss of Si gnal U UAS: U navailab le Seco nds[...]

C ERTI FICATI ON AND W ARRANTY FCC C LASS A C O MPLIANCE This equi pment has been tested and found to comply with the li mits for a Class A digital dev ice, pursuan t to Part 15 of the FCC Rules. Th ese limits are designed to pr ovi de reasonabl e pr otecti on a gai nst harmf ul i nte rfe rence whe n the equi pm en t is operat ed i n a comme rc ia [...]

ADC DSL Systems , Inc. 14402 Fr anklin Av e nue Tustin, CA 9278 0-70 13 Tel: 714.8 32.9922 Fax: 714. 832.99 24 Technical As sis t ance Tel: 800.6 38.0031 Tel: 714.7 30.3222 Fax: 714. 730.24 00 DNV C ertific ation, In c. REGISTERED FIRM IS O 9001/TL 9000 D OCUME NT : 152-3 88-10 0- 02, I SS UE 2 ´,.G¶1:¨ 1214391[...]