Complete Emulation and Analysis of T1 and Analog Signaling · Frame Synchronization TX, RX: Shows phase relationship on dual bar graphs Signalling Bits TX, RX: Shows a and b signalling

PCM1/PCM2: Tx, Rx (selected channel)

Tone (Analog or Selected PCMChannel)Range: -40 to +2 dBm ± 1 dBm (300 to 3300 Hz)Loop/Ground Start: Tip-RingE & M: Tip-Ring, Tip1-Ring1PCM1/PCM2: Tx, Rx (selected channel)

Analog Bipolar Amplitude onPCM1/PCM24

Range: -16 to +3 dBdsx±1dBdsxTypes: Emulation (Line), DSX monitor

PCM1 and PCM2 (T1 and SLC ¨96)METER MEASUREMENTS

Transmission ErrorsBPV: Bipolar Violations: 1 displayed

count for every 64 BPVFERR: Frame errors: 1 displayed count for

every 4 FERRCRC: Cyclic Redundancy Check: Calculated

for ESF framing modeSLIPS: Counts insertion or deletion of data

bits in data stream.ALARMS: Counts YELLOW and BLUE alarms.

Indicates "yes" or "no" occurrence of YELLOW and BLUE alarms.

Frame SynchronizationTX, RX: Shows phase relationship on dual bar graphs

Signalling BitsTX, RX: Shows a and b signalling bits for

each of 24 TX and RX channelsChannel Noise Measurements

TX, RX: Noise measurements on each of 24 channels (See Noise above)

SLC ¨ 96 Alarm ConditionsTX, RX: Display of ÒflagsÓ for A through D

shelf/ lines, and powerSLC ¨ 96 Protection Status

TX, RX: 4-bit display which ÒdecodesÓ to indicate status

SLC ¨ 96 Maintenance MessageTX, RX: Display of ÒflagsÓ to indicate presence or absence of messages and indicates Channel Number and Time Slot.

TRANSMISSION IMPAIRMENTMEASUREMENTDirect and Reversed Connections are provided forconnection of an AM5XT or similar TransmissionImpairment Measurement Set (TIMS) to TX/2Wand RX circuits.

GENERALSize: 8.3ÓW X 3.5ÓH X 12.1ÓDWeight: 6.5 lb, 11.5 lb with battery option

Shipping Weight:10 lb,15 lb with batteryoption

Operating Temperature: 0¡C to 50¡CHumidity: 10 to 90% non-condensingPower Requirements: 90Vac to 264Vac, 50

to 60 Hz, 45 Watts (Ring load capacity reduced to 3 REN at 100 Vac)

OPTIONSRS232c: Up to 9600 baud, selectable parity

(even or odd with character length of 7 bits + 1 stop bit; or no parity with character length of 8 bits + 1 stop bit)

Printing: (Set-ups, Events, Meters)Battery: Sealed lead-acid battery and

charger. Provides up to 8 hours of portable use before recharge. Recharges in 8 hours or less at 25¡C.

ACCESSORIESSoft CaseRack Mounting Kit

• DS1 PCM Drop & Insert• Non-Intrusive PCM Measure• SLC®96 Monitoring

• CO Battery, Ring Generator, and Dial Tone Generator Sources

• Signalling Monitor/Emulator• Dialed Digit Monitor/Emulator• Dialed Digit Analyzer• Complex Sequence Dialer• VF Level, Frequency, Noise Measure• Dual Multimeter

SF DialingSpeed Range: 8 to 13 ppsPercent Break: 40% to 75%Accuracy at 10 pps: ±0.3 pps (40% to 75%break ±2 ms)Interdigit Time: 200 to 999 ms ±4 ms

Tone ThresholdLevel Threshold: -40 dBm to 0 dBm

On/Off Hook ThresholdLevel Threshold: 2 to 60 VAccuracy: ±3% ±0.7V

Measurement Accuracy of Analysis(Unless otherwise specified)Frequency: ± 2 Hz (DTMF³ 25 ms; MF ³ 35ms)Level: ± 1 dBTiming: ± 2 ms

METER MEASUREMENTS

Analog AC Volts*Range: 0 to 130Vrms ±2%, ±1Vrms4(±0.7Vrmswith cm1,2 0¡C - 50¡C). (DC offset < 75V, crestfactor < 1.6) (15 to 75 Hz)Loop/Ground Start: Tip-Ring1, Tip-Ground2,Ring-Ground2, Common mode Tip-Ring2

E&M: Tip-Ring1, Tip 1-Ring 11 (Emulation Range :0 to 3Vrms),Common mode Tip-Ring2, Commonmode Tip1-Ring12, E-Ground2, M-Ground2, SG-Ground2, SB-Ground2

PCM1/PCM2: Tx Common mode, Rx Commonmode

Analog DC Volts*Range: -150V to +150V ±2%, ±1V (±1V withcm1,2 0¡C - 50¡C)Loop/Ground Start: Tip-Ring1, Tip-Ground2,Ring-Ground2, Common mode Tip-Ring2

E&M: Tip-Ring1, Tip-Ring11 (Emulation Range :-4V to +4V) Common mode Tip-Ring2, Commonmode Tip1-Ring12, E-Ground2, M-Ground2, SG-Ground2, SB-Ground2

PCM1/PCM2: Tx Common mode, Rx Commonmode

Analog Tip Current*Loop/Ground Start: Tip current1

DC Range: 5 to 120mA ±2%, ±1mA (72VdcMAX)

Noise (Analog or Selected PCMChannel)Range: 50 to 90 dBrn ±2dBrnFilter: CMSG or Flat (Analog signals are alsofiltered 300 to 3300Hz flat by codec)Loop/Ground Start: Tip-RingE & M: Tip-Ring, Tip1-Ring1

About AmeritecAmeritec Corporation is a

micro-electronics design andmanufacturing company located inthe Greater Los Angeles area.

Dedicated to the special testingneeds of the telecommunicationsindustry, we proudly offerproducts which employ the latestmicrocomputer techniques.Everything we produce is highlysophisticated in circuitry andsoftware, yet is easy to usebecause of the degree of “humanengineering” incorporated into thedesign.

If you would like more informa-tion about the AM8a or any of ourother products please write to usor call. A demonstration of theAM8a can be easily arranged.

SLC®96 is a registered trademark of AT&T

All specifications subject to changewithout notice.

*- Protection Circuits assume a source impedance>300½ to limit current.1- Common mode AC plus DC voltage < 100V peak 2-Common mode AC plus DC voltage < 10V peak3- Measurements are displayed as peak voltage at theDSX point. VdBdsx = 20 log(Vpeak/3)4- Event details display of ringing is 0 to 130Vrms ±3%,±1 Vrms(±0.7Vrms w/cm1,2 0¡C - 50¡C).

760 Arrow Grand Circle ¥ Covina CA 91722 ¥ +626 915 5441 ¥ www.ameritec.com

Complete Emulation and Analysis ofT1 and Analog Signaling

AM8a PCM/VF Call Analyzer

PABX Demarcation TestingThe AM8a can monitor or emulate the station

(line) side or the central office (trunk) side of aPABX. The PABX can be emulated for thepurpose of testing the central office trunksignalling, or the central office can be emulatedlooking toward the PABX.

The AM8a has built-in central office batterypower supply, loop length emulation, ring gener-ator and dial tone generator. All ofwhich are variable, and programmable toprovide for a wide variety of test config-urations. These facilities, for example,allow the unit to simulate DID or 911terminal equipment.

Limit testing of all signalling parame-ters is possible due to the full program-mability of the built-in generators and thedetailed signalling decode and analysiscapability of the built-in receivers.

Precise one millisecond time tagging ofall decoded signalling events allows easyidentification of signalling timingproblems.

At the PBX or at the central office, demarcationtesting is simple and comprehensive.

Inter-Exchange or LongDistance Carrier Testing

Monitoring or troubleshooting of analog or1.544 Mbps PCM trunks is easy with the AM8a.

The unit can non-intrusively monitor a T1 spanand either camp on a specific channel or scanchannels for new both-way activity. Signallingdetection is completely automatic as the unitautomatically differentiates between dial pulse,DTMF or MF signalling and decodes them appro-priately. No more missing unanticipated events.

When moving the unit around the central officeto different trunk types, reconfiguration of theAM8a is easily accomplished through the set-up“Store and Recall” feature.

It is even possible to print out exception reportsby connecting an accessory printer and using thebuilt-in signalling thresholds feature to automati-cally screen for problems. This is a very effectivefeature when dealing with intermittent or elusiveproblems.

Subscriber Line Concentrator(SLC ®) Testing

The AM8a provides a full, comprehensiveanalysis of AT&T SLC ®96 PCM circuits (orindustry equivalent). Signalling problemsbetween the central office and an AT&T SLC®96remote terminal are easy to detect andtroubleshoot using the AM8a as a signallingmonitor.

Together with the optional hard copy outputcapability, the AM8a provides a printed activityreport in addition to a powerful problem solvingtool.

The following SLC ®96 analysis features areprovided:

1. Ability to monitor SLC ®96 Mode I (unconcen-trated) and Mode II (concentrated) calls andrecord signalling transitions (off/on hook, digits,tones, etc.)

2. Ability to monitor the 4 Kbps data link inMode II and time stamp to 1ms accuracy any orall Concentrator Field Messages sent by both theRT and the integrated SLC ®.

3. Provide monitoring of all Maintenance,Protection and Alarm Field change of values inboth TX and RX directions.

4. Ability to map a specific channel to its appro-priate time slot assignment for Mode II operation.

5. Programmable display fields to allow the userto analyze all events or only those exceedingprogrammed thresholds.

AM8a and printer with printout showing SLC®96 channel assignment.

Receive, decode, analyze or emulatechannel associated signalling on DS1 (PCM)circuits or analog lines and trunks.Analog

2w Loop Start2w Ground Start2w E&M4w E&MDIDSFSS4

1.544 Mbps PCM (DS1)D3/D4ESFSLC® Mode I *SLC® Mode II *

* Monitor Only

Built-in ProgrammableEmulation:• C.O. Battery Supply• Ring Generator• Dial Tone Generator• Pulse and DTMF/MF

Tone Dialling Generator• Tone Generator

Built-in ProgrammableAnalysis:• Pulse/Tone/Signalling

event receiver, decoder, analyzer

• AC/DC Voltmeter

IntroductionIn a switched public or private telephone

network, “signalling” is the process of settingup a call connection through the network atthe beginning of a call and tearing it down atthe end of the call.

A businessman using his telephone sends“signals” into his PBX, the PBX “signals”the local central office, the local centraloffice “signals” into a long distance carrierand so on.

The Ameritec Model AM8a is a CallAnalyzer capable of observing andtroubleshooting signalling problems on awide variety of analog or channel-associatedPCM circuits.

The AM8a is capable of non-intrusivemonitoring or intrusive emulation at mostpoints in the signalling path.

Highly portable and battery powered, it isequally useful in the field, in the switch roomor in laboratory applications.

Off Hook

Display Selectionfor Events orVoltmeter

Direct EntryKeypad

Far EndWink

Far End Wink

Far EndAnswer

ON/OFFPower Button

Volume controlfor speaker

Microphone tocommunicate overline under test

Connection oftelephone handset forprivate conversations

Connection of externalTransmission ImpairmentMeasuring Set (such asAmeritec's AM5XT)

• Optional RS232 Port for exception reporting & remote control.

• Decoding of MF, DTMF and dial pulse digits without pre-determination of type.

• Built-in Speaker.• Optional Battery Pack for

8 Hours Use

Visual LED indicatorsto show configurationof unit.

Near EndOn Hook

Loop St/Ground StAnalog Connection

E & M TrunkConnections

PCM 1.554 Mbpsspan connections

Groupingof DirectFunctionSwitches

Scrolling up &down pageswithin eachsetup menu

Scrollingacross

choices forsetup

parameters

Unit setup includingvariables when emulating.

Analyzer Thresholds andAuto Dial sequences

ON/OFF Toggles forconnection to Trunkinputs & TIMS.Enable of hands-freetalk and auto send ofstart signal

MF Digitsincluding KP and ST

Dialed DTMF DigitsElapsed time fromOff-Hook to selectedevent.(In thisexample a Wink of247ms duration.)

DetailedCallAnalysisFar End

On Hook

Complex Sequence Auto-DialerThrough a front panel keypad the operator can

dial any sequence of digits and events eithermanually or automatically.

Up to 10 complex dialing sequences can bestored and later recalled for execution under the"auto dial" function.

For example, the following sequence might beused to initiate test calls from a PABX station anduse multiple signalling modes to reach andcommunicate with specialized equipment.

PCM Drop & InsertThe AM8a provides two PCM ports with dual

receivers and transmitters. These ports can beused for passivemonitoring of aPCMspan ortheAM8amay beinsertedinseries

with the PCM span for full duplex dropand insert testing of individual channels.

The two PCM ports can also be usedfor clock synchronization testing ofPCM spans where one port is connectedto a reference span while the secondport is connected to the span under test.

The ability to measure VF level, frequency andnoise on analog circuits is built into the AM8a.

The unit also provides a variety of non-intrusivePCM digital tests, including bit and frame slips,CRC errors, framing errors, bi-polar violations,yellow and blue alarms.

For more extensive analog or channel-associatedPCM testing, a port is provided (labeled TIMS)which allows connection of a full range test setsuch as the Ameritec Model AM5XT.

Easy SetupCommonly used AM8a test setups can be stored

in non-volatilememory forlater use. 20non-volatilememories areavailable forinstant recall ofpersonalizedAM8a configu-ration setups.

An additional 20 memories are availablefor recall of emulate/analyze parameters.This is in addition to the previouslymentioned memories for 10 auto-dialsequences plus last number redial.

High Tech, Small SizeThe AM8a incorporates multiple digital signal

processors and microprocessors in a highlycompact portable package. The unit may bepowered from commercial mains where itautomatically adjusts for compatibility with localline voltage and frequency, or it may be poweredfrom an optional internal rechargeable batterypack. An optional RS232 port and aux portallows for automatic hard copy reporting andremote control. A 24-pin LINE/TIMS connectoron the rear of the AM8a provides secondaryaccess to all front panel connections and is usefulfor permanent AM8a installations in systems andother test equipment.

Easy setup store and recall.

1 of 10 Auto-Dial Sequences

DTMF digit, dialed afterreceipt of start signal

Pause for Dial Tone

DTMF Digits

Toggle toMF Dialing

KP Signal

Detailed Digit, Event AnalysisWhen connected to a circuit, the unit will display

signaling events occurring in either direction on alarge backlighted liquid crystal display (LCD).Up to 80 dialed digits and/or events (on hook, offhook, wink, etc.) may be collected and displayedfor each call.

By merely placing a cursor under the digit orevent of interest, the operator can observe, on thesecond line of the display, all details associatedwith that event. For example, when selecting aDTMF digit, the unit will display thetime of the digit and its duration, as wellas the measured high and low bandfrequency and level.

If the operator had previously enteredgood/bad mask parameters, then anyout-of-spec detail would be high-lightedto the operator.

With each event in a complexsequence captured in detail,troubleshooting becomes a matter ofsolving the problem instead ofsearching for the problem.

Built-in Analog and PCM Testing

Display of A/B signalling bits for all 24 T1 time slots (transmit and receive).

Dual PCM ports.

MF Digits

ST Signal

Rear of AM8a with RS232 ports for hard copy output and remote control.

Built-in VoltmeterA dual multimeter with analog and digital

display is provided. AC volts, DC volts, andcurrent measurements may be operator selected fortip to ring, tip to ground or ring to ground connec-tions. A display of all 24 PCM channel A/B bitscan also be viewed.

Portable or Rack MountNo other signaling test set of this type is as

full featured, small and convenient. About thesize and weight of a telephone directory, it iseasily transported from lab to field. Forpermanent installations, a rack mounting kit isavailable which will allow 19" relay rackmounting in only two rack increments ofspace.

Accessories and OptionsProvided

Model AM8a, removable front cover withstorage, power cord, monitor cables and instructionmanual.

Optional BatteryAn optional internal, rechargeable

battery pack is available for full portable"cordless" operation. The batteries areof sealed lead-acid type and require nomaintenance. A front panel low batteryindicator indicates when recharging isneeded.

The built-in charger allows thebatteries to be charged even while theunit is in operation.

Options25-0071 RS232 Remote Control

Port with Auxiliary RS232 Output Port.

24-0018 Internal Power Pack (Sealed Rechargeable Lead Acid Batteries) andInternal Charger.

85-0076 19" Rack Mount Kit.

48-0062 6 Ft. Bantam to Clip Input Cable.

48-0047 6 Ft. Bantam to Bantam Input Cable.

48-0048 6 Ft. Bantam to 310 Input Cable.

87-0070 Padded Carrying Case

Dual multimeter display showing battery and loop current measurements.

AM8a with manual, cables, cover, and optional soft carrying case.

AM8a shown in rack mount configuration.

Frequency: 15.0 Hz to 70.0 Hz in 0.1 Hz stepsLoad: 5.0 ringer equivalents (5 REN) maximum(If no battery option and AC input is less than 100volts, will work with 3 REN or less. Loop Lengthmust be 1500 ohms or more.)Ring Trip: Below 2100 ohms; 2100 ohm looplength will not detect ring trip (Loop Closure,answer). Cadence:

Rings: 1 to 3, individual on/off timersOn Time: 0 to 5000 msOff Time: 0 to 9999 ms

Ring Time (before thermal shutdown)Minimum: 5 minutes (max load)Typical: 10 minutes

Call Progress Tones:Dial Tone Generation:

Low Frequency: 0, or 300 Hz to 3300 HzLow Freq. Level: -40 dBm to -3 dBmHigh Frequency: 0, or 300 Hz to 3300 HzHigh Freq. Level: -40 dBm to -3 dBmCadence Tone Burst: 1 to 3, individual on/off

timersCadence On Time: 0 to 9999 msCadence Off Time: 0 to 9999 ms

Start SignalsWink Begin: 15 to 999 msWink Duration: 50 to 999 msDelay Begin: 15 to 999 msDelay End: 100 to 9999 msDial Tone Delay From Seizure: 15 to 9999 ms

DialingPulse :

Speed: 5 to 25 ppsPercent Break: 40% to 85%Interdigit Time: 120 to 999 ms±3msAccuracy at 10 pps: ±0.1 pps (40% to 75%

break ±1%)SF:

Frequency: 2600 HzLevel: -30dBm to 0 dBmSpeed: 8 to 16 ppsPercent Break: 40% to 85%Interdigit Time: 120 to 999 ms ±2msAccuracy at 10 pps: ±0.1 pps (40% to 85%

break ±1%)DTMF:

Low Band Frequencies: 697, 770, 852, 941 HzLow Band Offset: -5% to +5%, in 0.1% stepsLow Band Level: -40 dBm to -3 dBmHigh Band Frequencies: 1209, 1336, 1477,

1633 HzHigh Band Offset: -5% to +5%, in 0.1% stepsHigh Band Level: -40 dBm to -3 dBmOn Time: 25 to 99 msOff Time: 25 to 99 ms

MF (R1):Frequencies: 700, 900, 1100, 1300, 1500,

1700 Hz

Low Freq. Offset: -5% to +5%, in 0.1% stepsLow Freq. Level: -40 dBm to -3 dBmHigh Freq. Offset: -5% to+5%, in 0.1% stepsHigh Freq. Level: -40 dBm to -3 dBmOn Time: 25 to 99 msOff Time: 25 to 99 ms

[KP digit ON time is twice programmed value.]

Tone GenerationFrequency: 300 Hz to 3300 HzLevel: -40 dBm to 0 dBm

Generation Accuracy forEmulation Parameters (Unless other-wise specified)

Frequency: ± 1 HzLevel: ±1dBTiming: ± 1 ms

ANALYSISUser-controlled threshold parameters for eventdetection.

FlashMinimum On Hook Time: 50 to 1250 ms

DisconnectMinimum On Hook Time: 50 to 1250 ms

Call Progress TonesFirst Frequency: 350, 440, 480, or 620 HzSecond Frequency: 350, 440, 480, or 620 HzFrequency Tolerance: 0% to 3.5% in 0.1%stepsMinimum Level per Tone: -30 dBm to -3 dBmAllowable Twist: -12 dB to +12 dBGuard Time: 0 to 99 ms

Start SignalsWink Begin: 15 to 999 msWink Duration (Min/Max): 50 to 999 msDelay Begin (Min/Max): 0 to 999 msDelay End: 0 to 9999 msDial Tone Delay From Seizure (Min/Max):0 to 9999 ms

Tone Dialing (DTMF and MF)Frequency Tolerance: 0% to 3.5%, in 0.1%stepsLow Freq. Level Range: -30 dBm to -3 dBmHigh Freq. Level Range: -30 dBm to -3dBmAllowable Twist: -12 dB to +12 dBDTMF Tone On/Off Duration: 25 to 99 ms ±2 msMF Tone On/Off Duration: 35 to 99 ms ±5 msGuard Time: 0 to 99 ms

Pulse DialingSpeed Range: 5 to 25 ppsPercent Break: 40% to 85%Accuracy at 10 pps: ±0.2 pps (40% to 75%break ±2%)Interdigit Time: 200 to 999 ms ± 5ms

AM8a TechnicalSpecificationsLINE INTERFACESAnalog Circuits (Switch or Terminal/Line)Loop/Ground Start:E & M: 2 wire and 4 wire,Types I, II, III, IV, and VDIDSFSS4 (optional)

Digital Circuits (PCM1 or PCM2)1.544 megabits-per-second Pulse CodeModulation (PCM). Emulation and monitoring ofall major circuit types. Two span (ports) providedto support drop-and-insert channel testing.Framing: D3/D4, ESF, SLC¨96 Mode I and IINOTE: SLC ¨96 is monitor-onlyZero Suppression: B8ZS, ZCS, and AMI

DialingAll circuit types support applicable dialing modeswith full digit set: 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, *(KP),#(ST), A, B, C, D (for DTMF only).

Dual Tone Multi-Frequency (DTMF)Dial PulseR1 Multi-Frequency (MF)Single Frequency (SF)

Start SignallingAll Circuit Types Support Applicable StartSignals: Immediate, Delayed, Wink, Dial Tone

Line SignallingDetect and Generate All of These LineSignals: On Hook, Off hook, Wink, Flash,Unbalance (generate only), Ringing, Ground Start(tip and ring), Answer supervision (reversebattery).

EMULATIONUser-controlled parameters for circuit emulation.

Digital PortsImpedance: 100 ½ at 1.544 megabits-per-second bipolar PCM (1K ½ in DSX monitormode).

Analog Office BatteryVoltage: 20 V to 72 V ±2%Current:: 120 mA maximum (not selectable)

Analog LoopDC Loop Length: 0 to 2100 ½, adjustable in300 ½ stepsDC Hold Resistance: 10 ½, 330 ½, 430 ½AC Impedance: 135½, 600½, 900½, 1200½ at300 to 3300 Hz, 2.16 µF (IN or OUT). OUT=24µFRinger Load: 2.0 type B ringer equivalents (2REN)

Ringer GenerationVoltage: 30 Vrms to 105 Vrms ±4% in 5 Vrmssteps