3520

Product Overview:

The Rochelle Model 3520 Modem-On-Hold Tester is a stand-alone instrument for development and testing of V.92 Modems and Integrated Access Devices

The Model 3520 features user-friendly software that allows the user to set CO line parameters, ringing voltage and frequency, and signal levels.

The Model 3520 includes selectable 6, 9, and 15Kft artificial lines (26 AWG).

Secondary CO line permits end-to-end voice path between two client modems

Pass-Through Mode places the CO-line simulator in series between a client modem and other testers or an external POTS line

Digital Connect Modem places the CO-line simulator in series between a client modem and a Remote Access Server using T1 Robbed Bit Signaling.

Features and Benefits:

Stand-alone system combining a 486-100 controller, a CO line simulator and a V.92 Modem-On-Hold tester in one package.

Fully programmable FSK signal generator (mark and space level, frequency and duration) and messages allows complete simulation of Caller ID, Call Waiting ID, Visual Message Waiting and other network services.

Fully programmable signal generators (levels, frequency, duration, and twist) permit testing of DTMF, Call Progress, CPE Alerting Signal (CAS), and 12/16 KHz Metering Tones.

A programmable white noise generator allows testing with noisy line conditions.

CENTRAL OFFICE LINE SIMULATION
Line Type	Two-wire, loop start
Source AC Impedance	Selectable 600 ., 900 ., or 270 . + (750 . //150nF)
CO Voltage	Floating +/- 48 VDC (+/- 2 V)
Line Current	Programmable from 10 to 80 mA (+/- 2 mA)
Ringing Voltage	20 to 80 Hz, 15 to 80 Vac RMS (+/- 2 V)
Artificial Line Simulation	0, 6Kft, 9Kft, or 15Kft (26AWG)
Audio Path	Routed to Secondary CO Line, FXO Port, or CODEC

SECONDARY CO LINE (Client to Client Connection)
Line type	Two-Wire, fixed feed (12V)
2 to 4 Wire	Hybrid Optimized for 600 ohm impedance
Signaling	Direct Connect Under Software Control

FXO PORT (Client to V.90 Tester or POTS Line)
Type	Two-Wire, loop start DAA, FCC Part 68 and CTR 21
2 to 4 Wire	Hybrid Optimized for 600 ohm impedance
Signaling	DTMF Pass-Through from Client Modem
Distortion	-85 dB typical @ 1000Hz

DIGITAL PORT (Client to RAS)
Type	4-Wire T1 Short-Haul interface, 1.544Mbps
Signaling	T1 Robbed Bit Signaling with Wink-Start
CODEC	PCM u-Law and A-Law selectable

CALL WAITING AND CAS GENERATION
Level Resolution and Accuracy	0 to -48 dBm in 1 dB steps (+/- 1 dB)
Frequency Resolution and Accuracy	Programmable to +/- 5% of nominal (+/- 1 Hz)
Duration	Programmable from 40 to 200 mS

FSK CALLER ID GENERATION
FSK Transmitter Standards	Bell 202 and ITU V.23
Level Resolution and Accuracy	0 to -48 dBm in 1 dB steps (+/- 1 dB)
Frequency Resolution and Accuracy	Programmable to within +/- 5% of nominal freq.

NOISE GENERATION
Type	Flat (>20 KHz), Pseudo-random
Range	20 to 90 dBrnC in 1 dB steps

CONTROLLER SYSTEM
Controller	486SX, 100 MHz
Memory	10MB DRAM, 24MB DiskOnChip (expandable)

MECHANICAL
Size	10" x 4" x 13" (25 cm x 10 cm by 33 cm)
Weight	10 lbs (4.5 kg)
Operating Temperature	32 F to 122 F (0 C to 50 C)