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• If the framing and CRC-4 state of the received signal do not

match the framing and CRC-4 settings, the test set will display
Loss of Frame condition and may display loss of CRC DET.

CRC-4

Select yes to measure CRC-4 errors on the incoming signal and

also  to  transmit the  CRC-4  bits  on  the  outgoing signal.  CRC-4
works  with PCM-31  and  PCM-30  framing  only.  If UNFRAME   has
been selected, the  CRC-4  configuration is NO.

TEST RATE

Options: 2.048M (F1), Nx64K (F2)

Select an appropriate rate for the circuit under test.

• 2.048M: Configure the test set for full rate testing. If uncertain

about which one to choose, select this for full rate testing.

• Nx64: Configure the test set

for fractional testing. Upon
pressing, the SELECT TIME
SLOT screen is displayed as
in the screen shown to the
right. In it, select each time
slot to test, these can be
selected automatically or
manually using the following
procedures:

11:50:50

>LINK DN- Idle

STU-C E1<

SELECT TIME SLOT

RECEIVE

01

02 03 04 05 06 07 08

09 10 11 12 13 14 15

17 18 19 20 21 22 23 24

25 26 27 28 29 30 31

TRANSMIT

01

02

03 04 05 06 07

08

09 10

11 12 13 14 15

17 18

19 20 21 22 23

24

25 26

27 28 29 30 31

AUTO SELECT UN-SEL CLR-ALL

Figure 29 Select Time Slot Screen

Manually Selecting Time Slots

1. Use to choose the time slot and press SELECT

(F2). Repeat until finished. Selected time slots remain high

-

lighted, as shown in Figure 29.

• Press UN-SEL (F3) to deselect a time slot.

• Press CLR-ALL (F4) to clear all selections and to start over.

Automatically Selecting Time Slots

1. Press AUTO (F1) if receiving a signal which is already format-

ted in the Nx64 kbit/s fractional E1 format.

In AUTO, the  test   set  automatically configures  time  slots   by
looking  for  active   data. It will configure  the  transmit  side   to
be  the  same as  the  active  time  slots  on  the  receive side.  The
test  set  determines which  time  slots  are  active  by  first deter

-

mining which time slots are idle. Any time slot that is not idle

is assumed to be active.

In PCM-31 framing, time slots 1-31 correspond to channels 1-

31. In PCM-30 framing, time slots 1-15 correspond to channels

MTT-14B e_Manual D07-00-083P RevA00

Page 49 of 101

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Содержание MTT-14B

Страница 1: ......

Страница 2: ...mercare veexinc com Website www veexinc com EC Directive on Waste Electrical and Electronic Equipment WEEE The Waste Electrical and Electronic Equipment Directive aims to minimize the impact of the di...

Страница 3: ...MTT 14B e_Manual D07 00 083P RevA00 Page 3 of 101...

Страница 4: ...E Mode PING Results 23 2 2 4 4 Profile 24 2 2 5 Advanced Features 25 2 2 5 1 ATM Features 25 2 2 5 1 1 VCC Scan 25 2 2 5 1 2 OAM Cell Generation 29 2 2 5 1 3 OAM Cell Statistics 31 2 2 5 2 IP Features...

Страница 5: ...opback Test 74 3 9 Nx64 kbit s Testing 75 4 Reference 77 4 1 PING Technology 77 4 1 1 Classical IP over ATM CLIPoA 78 4 1 2 Ethernet Frames over ATM EoA 78 4 1 3 PPP over Ethernet PPPoE over ATM 79 4...

Страница 6: ...urn up read performance data and system loopbacks for troubleshooting 1 1 Connector Panel PAYLOAD STU Figure 1 Connector Panel The module panel contains PAYLOAD RJ 45 port for E1 testing STU RJ 45 por...

Страница 7: ...p as STU C Blinking Red Indicates that the module is attempting to link up xTU R Green Indicates that the module is linked up as STU R Blinking Red Indicates that the module is attempting to link up L...

Страница 8: ...G SETUP TEST 2 2 5 ADVANCED FEATURES 2 4 VIEW STORE PRINT 2 5 PROFILES 2 2 3 MODEM CONTROL 2 2 3 1 LOOPBACK CONTROL 2 2 3 2 SYSTEM SETTINGS 2 2 5 ADVANCED FEATURES 2 2 5 1 ATM FEATURES 2 2 5 2 IP FEAT...

Страница 9: ...e connected to PL RATE Payload Rate Options AUTO F1 128K F2 192K F3 256K more F1 320K more F2 384K more F3 512K more F1 768K more F2 1024K more F3 1152K more F1 1280K more F2 1536K more F3 2048K more...

Страница 10: ...SET RETRAIN Modem Status screens provide general performance information on the STU C and STU R For the far end data N A is displayed Note that CH2 status screen information is only available in 4 wir...

Страница 11: ...eclared or 1 or more LOSW defects are declared 50 CRC errors during a 1 second interval is equivalent to a 30 error frame rate for a normal frame length Reset when ET is reset UNAVAILABLE SEC Count of...

Страница 12: ...ast 3 consecutive received frames contain 1 or more errors An LOSW defect is cleared when at least 2 consecutive received frames contain no errors ATTN Triggered when the local attenuation value is gr...

Страница 13: ...line to change to LOOP DN and the appropriate EOC message will be sent The STATUS line will report either SUCCESS or FAIL STU C C F2 Use this to loopback the STU C facing the cus tomer This will cause...

Страница 14: ...en the ALARM LED will be on RECEIVE EOC SNR OFFSET For reporting via the EOC for STU C R only ON for far end sending SNR raw values to near end OFF for far end sending SNR margin values to near end OF...

Страница 15: ...eric keypad If available use to move the cursor MODE Options PROFILE F1 LLC BRG F2 LLC RTE more F1 CLIPoA more F2 PPPoE more F1 PPPoA F2 more Select the protocol mode for the PING test PROFILE Use to...

Страница 16: ...ion method for carrying traffic over AAL Type 5 over ATM LLC Logical Link Control based on IEEE standard 802 2 LLC encapsulation is used when multiple protocol are encapsu lated over a single ATM Virt...

Страница 17: ...e module sends a request to the server the server responds and provides an IP address Upon selecting DYNAMIC the LOCAL IP line disappears the network dynamically assigns an IP address LOCAL IP Enter a...

Страница 18: ...t Along with VCI VPI identifies the next destination of a cell as it moves through a series of ATM switches on the way to its destination The service provider typically assigns VPI VCI Range 1 to 6553...

Страница 19: ...eives no response it will display PING FAIL This indicates that either the destination did not receive the PING message or it did not reply Press F4 to stop the test press it again to restart testing...

Страница 20: ...30 55 LINK UP 4W STU R ST 12 30 10 ET 00 00 45 LOCAL IP 001 002 003 004 DEST IP 002 003 004 005 PING TEST DHCP PASS PING IN PROGRESS STOP Figure 11 DHCP IP Address Assigned 2 After receiving an IP ad...

Страница 21: ...G START more Figure 13 PPPoA PING Setup Screen Configure these settings for PPPoA and PPPoE modes ENCAPSULATION Options LLC F1 VC MUX F2 AUTO F3 This refers to the Encapsulation method for carrying tr...

Страница 22: ...h a series of ATM switches on the way to its destination The service provider typically assigns VPI VCI Range 0 through 65535 The default is 35 which is a typical Ethernet customer assign ment Along w...

Страница 23: ...ion 1 Place the cursor on USER ID 2 Press EDIT F1 and a character screen is displayed 3 Press INPUT F3 to enter the character grid Notice a cursor appears in the grid and INPUT changes to STOP 4 Use t...

Страница 24: ...the module has connected to the router broadband access server ISP The next step will be to verify authentication FAIL means that no connection to the ISP is available PPP PPP in progress means that t...

Страница 25: ...e Repeat until finished If a mistake is made press STOP F3 use to select the incorrect character and then press DELETE F2 to delete the character INSERT F1 to add a character left of the selected char...

Страница 26: ...resets and starts again Figure 16 VCC Scan Screen This feature is used to verify what PVC is active at the customer location Very often VCCs are directed toward the wrong desti nation and they create...

Страница 27: ...eserved for future VP functions Any value 00000000 00000111 Reserved for future functions Any value 00000000 000SSSSS1 Reserved for future functions Any value 00000000 000TTTTT2 Segment OAM F5 cell An...

Страница 28: ...000000 End to end OAM F5 cell Any value Any value other than 00000000 00000000 VC resource manage ment Any value Any value other than 0000000 00000000 0000000 00000110 Reserved for future VC functions...

Страница 29: ...ell NNI VC resource management cell 111 Reserved for future VC functions after Rec I 361 Sec 2 2 4 and 2 3 3 Table 3 PTI Decode Values CLP Cell Loss Priority is one bit that may be set by the user or...

Страница 30: ...default 0000 Enter a value using SHIFT and the numeric keypad Generic Flow Control assists in the control of the flow of traffic Used only for UNI interfaces It is primarily used to ease short term ov...

Страница 31: ...of the OAM ATM PING Tx Number of OAM cells transmitted Note The following items will display N A unless loopback F4 or F5 cells are received Rx Number of OAM loopback cells received LOST Number of tra...

Страница 32: ...not recorded while in ADVANCED FEATURES IP FEATURES menu Each time that an OAM request is received and answered the counters in the screen to the right get updated The test set will reply to F4 F5 seg...

Страница 33: ...on the segment F4EEAIS AIS F4 path end to end F4EERDI RDI F4 path end to end F4EE_LP loopback request F4 path end to end F5EEAIS AIS F5 channel end to end F5EERDI RDI F5 channel end to end F5EE_LP loo...

Страница 34: ...C to change any of the configuration items MODE Options PROFILE F1 LLC BRG F2 LLC RTE more F1 CLIPoA more F2 PPPoE more F1 PPPoA more F2 Select the protocol mode for the PING test PROFILE allows stori...

Страница 35: ...VCI 35 DNS SERVER MANUAL DNS SERVER IP 206 13 28 12 USER ID PASSWORD 11 50 45 SHOWTIME 4W STU R CONFIGURATION MODE CLIPoA ENCAPSULATION LLC VPI 8 VCI 35 LOCAL IP 003 044 055 066 DNS SERVER MANUAL DNS...

Страница 36: ...DHCP request to the server the server responds and provides an IP address Note that upon selecting DHCP the LOCAL IP setting disappears DYNAMIC Dynamic management provides a way for devices to obtain...

Страница 37: ...rvice provider LOCAL IP not in DHCP or DYNAMIC IP Specify the IP address of the circuit to be tested GATEWAY LLC BRG only Specify the gateway address A gateway is a device that con nects dissimilar ne...

Страница 38: ...UT F3 and a cursor appears in the grid 4 Use to move the cursor to the desired character Press ENTER to select that character The character will ap pear in the USER ID line 5 Continue selecting charac...

Страница 39: ...Use to move that cursor to a desired character When it is selected press ENTER and the character will appear after PROFILE NAME If a mistake is made press F3 and use to select the incorrect character...

Страница 40: ...ends a DHCP discovery mes sage to start DHCP negotiation with the ISP and obtain an IP address During this process the following is reported ST Start time indicates when CONNECT was pressed ET Elapsed...

Страница 41: ...e IP STATUS screen LLC BRG Static IP Status 11 50 45 LINK UP UP ST 11 20 40 ET 000 30 05 IP STATUS ARP PASS LOCAL IP 192 168 102 106 GATEWAY 207 181 199 178 DNS SERVER 206 13 28 12 DETAIL Figure 23 AR...

Страница 42: ...11 20 40 ET 000 30 05 IP STATUS ROUTER PASS PPP PASS LOCAL IP 207 181 199 105 GATEWAY 207 181 199 178 DNS SERVER 206 13 28 12 SUBNET MASK 255 255 255 000 AUTHENTICATION PAP 11 50 45 LINK UP UP ST 11...

Страница 43: ...ncorrect protocol PPPoE DISCOVERY FAILED PPPoE only There is no response to the discovery messages sent by the STU R The reasons could be an incorrect VP VC or an incorrect protocol WRONG AUTHENTICATI...

Страница 44: ...URL IP ADDR F2 LIST F3 Enter the Destination IP address GATEWAY Useto automatically PINGtheGateway IPaddress not available in LLC RTE and CLIPoA modes IP ADDR Use to enter a destination address Use S...

Страница 45: ...lt is 1 Select the number of PINGS to send per second from Use SHIFT the number keypad and to enter a value When ready press F4 to begin Press again to stop The follow ing is reported PING result will...

Страница 46: ...IP Options GATEWAY F1 URL IP ADDR F2 LIST F3 GATEWAY Useto automatically PINGtheGateway IPaddress not available in LLC RTE and CLIPoA modes IP ADDR Use to enter a destination address Use SHIFT the nu...

Страница 47: ...reported Figure 27 Echo Response Screen ST Indicates when CONNECT was pressed in IP FEATURES CONFIGURATION ET Elapsed Time since CONNECT was pressed in IP FEATURES CONFIGURATION LOCAL IP If STATIC IP...

Страница 48: ...AT F1 LOOP F2 TESTPAT Use for out of service bit error rate testing In this case a test pattern will be transmitted on the selected Transmit jack During Nx64K testing an idle code will be inserted on...

Страница 49: ...04 05 06 07 08 09 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 TRANSMIT 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 AUTO SELECT UN SEL C...

Страница 50: ...applying a low impedance termination CAUTION If uncertain select BRIDGE this will protect the 2 048 Mbit s signal TERM Terminate the received signal with a 75 or 120 im pedance termination The tested...

Страница 51: ...d in kbps see Section 2 2 Notes for Payload and Line Rates CUR SNR MARGIN Current signal to noise margin in dB is the maximum dB increase in equalized noise or the maximum dB decrease in equalized sig...

Страница 52: ...are excluded from unavailable time Reset when ET is reset LOSW SEC Loss of synchronization word second is a count of 1 second intervals during which one or more SHDSL LOSW defects are declared This p...

Страница 53: ...re errors An LOSW defect is cleared when at least 2 consecutive received frames contain no errors ATTN Triggered when the local attenuation value is greater than the user threshold value This is set i...

Страница 54: ...it becomes available only after 10 consecutive seconds without severe errors To continue the previous example if severe error injection is turned off and then 1 or 2 errors are inserted in the next 5...

Страница 55: ...CODE RATE is the Average Bipolar Violation error rate since the start of the test CRC Count of the number of CRC 4 block errors since the start of the test N A is displayed when the test set is not s...

Страница 56: ...played in decibels variance from DSX level dB MAX Hz MIN Hz Maximum and Minimum frequencies since the start of the test MFAL Multiframe Alarm seconds is a count of seconds that have had far end multif...

Страница 57: ...errors See Section 2 3 3 1 for 08 39 57 Meas LINK UP STU C E1 ET 001 04 13 RT CONTINU FRM PCM 30 C TxCK L1 Rx PATT 2e15 RATE 2 048M E1 SUMMARY CODE N A RATE N A BIT 0 RATE 0 00E 09 CRC 0 RATE 0 00E 0...

Страница 58: ...ISS 0 LOFS 0 FALM 0 MFAL 0 PAGE UP PAGE DN STOP MORE Figure 36 E1 Alarm Signal Screen E1 M 2100 550 Screen This screen provides pass fail measurements in accordance with ITU M 2100 550 This is used wh...

Страница 59: ...urement 08 39 57 Meas LINK UP STU C E1 ET 001 04 13 RT CONTINU FRM PCM 30 C TxCK L1 Rx PATT 2e15 RATE 2 048M E1 G 826 EB 0 EB 0 00 BBE 0 BBE 0 00 ES 0 ES 0 00 SES 0 SES 0 00 UAS 0 UAS 0 00 EFS 3005 EF...

Страница 60: ...ndards for consecutive zeros in AMI transmission 2e20 Industry standard 2e20 1 pseudo random bit sequence It is formed from a 20 stage shift register This pattern contains up to 19 zeros in a row and...

Страница 61: ...04 52 AA B2 0A CA 04 F2 6A A2 4A 04 2A 12 A2 04 32 82 5A 9A 04 22 F2 E2 04 8C 4C CC 2C AC 6C EC 1C 9C 0C B0 50 QRSS Industry standard Quasi Random Signal is formed from a 20 stage shift register and...

Страница 62: ...T and use the numeric keypad to enter the pattern Enter up to 24 bits Use INSERT F1 and DELETE F2 to make corrections 8 When finished press SHIFT followed by ENTER to store the pattern and to return t...

Страница 63: ...error injection RATE Applies only to CODE and BIT errors Errors are injected at a constant rate Other types of errors may be inserted one at a time under BURST mode which injects a set number of erro...

Страница 64: ...te 1 Select ERROR INJECTION 2 At TYPE press BIT F2 to select the error type 3 At MODE press RATE F2 4 At COUNT Press SHIFT and use the numeric keypad to press 1 The multiplier position shows 1 The cur...

Страница 65: ...igure 41 View Store Print List Screen The following F keys are available VIEW F1 Allows viewing of a selected file See Section 2 4 2 SAVE F2 Select a blank line and press this key to save your results...

Страница 66: ...the desired file with and press F3 and the file will begin printing 4 When finished press ESC 2 4 4 Deleting a Stored Test 1 From the module main menu select VIEW STORE PRINT 2 Select the desired fil...

Страница 67: ...ss ENTER to place the desired character in the label Continue this process until the FILENAME label is complete You may enter up to 15 characters If a mistake is made in the entry A Press F3 to stop B...

Страница 68: ...are as follows Note The DEFAULT file can t be deleted or unlocked DELETE LOCK more Figure 43 Profile List Screen The following F keys are available LOAD F1 Press to change all configuration settings...

Страница 69: ...MTT 14B e_Manual D07 00 083P RevA00 Page 69 of 101...

Страница 70: ...nk turn up utilizing proper G SHDSL line coding in 2 or 4 wire mode 3 2 STU R Emulation ISP Service Internet B RAS Router ATM DSLAM STU 2 or 4 wire G SHDSL STU R Figure 45 STU R Emulation Use STU R mo...

Страница 71: ...Achieve synchronization with DSLAM Link measurement like rate noise margin and attenuation 3 4 STU C Emulation Customer CPE 2 or 4 wire G SHDSL STU STU C Figure 47 STU C Emulation This mode is used t...

Страница 72: ...CK INTERN When finished press ENTER 3 Fromthemodule mainmenu selectTESTPATTERN andselect the desired test pattern When finished press ENTER 4 Connect the test set to the circuit as shown in Figure 48...

Страница 73: ...toring Point access 3 Connect the test set to the circuit as shown in Figure 49 and press HISTORY to acknowledge any blinking LEDs 4 Examine the LEDs for information about the circuit SIGNAL should be...

Страница 74: ...a tive purposes Verify that the span is not in service 3 From the module main menu select TEST CONFIGURATION and configure as follows MODE STUC E1 STUR E1 or E1 Tx SOURCE TESTPAT FRAMING As specified...

Страница 75: ...s HISTORY to acknowledge any blinking LEDs 3 From the module main menu select MODEM CONTROL LOOPBACK CONTROL and press the F key that will loop up the far end device The STATUS line will indicate eith...

Страница 76: ...ied by the circuit design CRC 4 As specified by the circuit design TESTRATE Nx64K thefractional SELECTTIMESLOTscreen is displayed Manually configure the timeslots or press AUTO If needed see Section 2...

Страница 77: ...MTT 14B e_Manual D07 00 083P RevA00 Page 77 of 101...

Страница 78: ...g TCP IP protocol However IP can be encapsulated onto the ADSL physical layer in several ways The following figure provides a summary of the different implementation schemes for IP over ADSL Applicati...

Страница 79: ...tion 4 1 2 Ethernet Frames over ATM EoA In this case the Ethernet frames are encapsulated into the ATM Adaptation Layer 5 AAL5 using RFC 1483 The encapsulation supports both routing and bridged This i...

Страница 80: ...sinesses PPPoE enables multiple PCs to connect to multiple destinations through a single shared CPE using one PVC This is based on the standard RFC 2516 PPP over Ethernet 4 1 4 PPP over ATM PPPoA PPPo...

Страница 81: ...either the PAP or the CHAP authentication mechanisms The PPP session is opened with the Broadband Remote Access Server B RAS The LCP session is handled between the B RAS and the PC CPE to manage the a...

Страница 82: ...ormance of a international connection ITU G 826 Error performance and transmission quality control ITU M 550 M 2100 Getting an international connection into service Q 140 Concerns redundant copies fro...

Страница 83: ...amplitude of the analog sample to a companding characteristic This characteristic is a formula which translates the amplitudes of the samples into the 8 bit code words Internationally a companding cha...

Страница 84: ...e far end equipment receives the E1 signal it examines the bit stream for these intentional bipolar code violations It then extracts the code and reconstruct the original data The HDB3 code substituti...

Страница 85: ...for an E1 pulse with 75W im pedance is either 2 37 volts for a binary 1 value or 0 volts for a binary 0 value Real world values are typically 10 Ideally each pulse transmitted would be perfectly symme...

Страница 86: ...ta can be placed as in Figure 61 Time Slot 0 One 2 048 Mbit s Frame 1 31 BITS 1 2 3 4 5 6 7 8 E 0 0 1 1 0 1 1 E 1 A Sa Sa Sa Sa Sa Notes Even Frame Contains FAS Odd Frame Contains NFAS Sa This bit is...

Страница 87: ...time slot 16 4 signalling bits per channel 30 channels 8 signalling bits per frame timeslot 16 15 frames of timeslot 16 signalling Frame 0 TS 16 bits MFAS 0000 NMFAS XYXX where X is spare bits If thi...

Страница 88: ...ligned with MFAS timeslot 16 multiframe SM FRM 2 Sub Multiframe 2 E E bit Errors c1 c2 c3 c4 CRC bits Figure 63 CRC 4 Multiframe Format A CRC 4 Cyclic Redundancy Check 4 is often used in E1 trans miss...

Страница 89: ...d across the E1 span When the terminating equipment calculates an error using CRC 4 it should transmit an E bit to the far end thus informing the far end equipment of the error E bit Performance Monit...

Страница 90: ...t With a complete circuit failure the test set will see either loss of signal alarm indication signal or remote alarm indication STU STU No Errors E Bit Error Trouble Point Test Set 1 Test Set 2 CRC E...

Страница 91: ...MTT 14B e_Manual D07 00 083P RevA00 Page 91 of 101...

Страница 92: ...table evidence of purchase within twenty 20 days of request by COMPANY freight prepaid B Software and Firmware Coverage COMPANY warrants soft ware media and firmware materials against defects in mater...

Страница 93: ...REPEATED EFFORTS TO INSTALL EQUIPMENT IN GOOD WORKING ORDER OR TO REPAIR OR REPLACE EQUIPMENT SHALL IN NO EVENT EXCEED THE PURCHASE PRICE OR LICENSE FEE FOR THAT PRODUCT NOR SHALL COMPANY IN ANY EVENT...

Страница 94: ...mulation 70 STU R Emulation ISP Service 69 STU R Emulation Private Network Service 70 V 54 Channel Loopback Test 74 C Calibration Statement 91 Connector Panel PAYLOAD and STU ports 5 D DHCP PING Passe...

Страница 95: ...t s Data Rate 82 2 048 Mbit s Framing FAS or MFAS 85 Basic Definitions 81 Converting a Voice Signal 81 CRC 4 Error Checking in a MultiFrame Format 87 E bit Performance Monitoring 88 Line Coding AMI or...

Страница 96: ...ration Screens 34 21 Profile Configuration Screens 38 22 DHCP IP Screens 39 23 ARP IP Screens 40 24 PPP IP Screens 41 25 PING Test Screen 43 26 Trace Route Screen 45 27 Echo Response Screen 46 28 STUx...

Страница 97: ...hape 84 61 FAS Framing Format 85 62 MFAS Framing Format 86 63 CRC 4 Multiframe Format 87 64 In service E bit Performance Monitoring 89 I IP Configuration Screen AUTHENTICATION PAP CHAP AUTO or NONE 35...

Страница 98: ...s 27 O OAM Cell Generation Screen CELL 30 LOST 30 Rx 30 Tx 30 CLP 29 GFC 29 ROUNDTRIP ms CUR AVG MAX and MIN 30 TIMEOUT 30 TYPE F4SGAIS F4SGRDI F4SG_LP F4EEAIS F4EERDI F4EE_ LP F5SGAIS F5SGRDI F5SG_LP...

Страница 99: ...hnology 77 Classical IP over ATM CLIPoA 78 Ethernet Frames over ATM EoA 78 PING Acronyms 80 PPP over ATM PPPoA 79 PPP over Ethernet PPPoE over ATM 79 PING Test Screen 43 PPPoA and PPPoE Mode PING Resu...

Страница 100: ...OP 47 STUx E1 Modem Status Screens ATTENUATION 50 CRC ERRORS 50 CUR SNR MARGIN 50 ET 50 LINE RATE 50 LOSW SEC 51 MAX SNR MARGIN 50 MIN SNR MARGIN 50 PAYLOAD RATE 50 SEVERE ERR SEC 50 UNAVAILABLE SEC 5...

Страница 101: ...and VCI Values 26 V VCC Scan Screen CLP 28 ET 25 PTI 27 ST 25 VCI 25 VPI 25 View Print Results Deleting a Stored Test 65 Locking and Unlocking a Stored Test 65 Printing a Stored Test 65 Renaming a St...

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