DESCRIPTION The Model 930A Communications Test Set combines the functions of a Transmission Impairment Set, a Return Loss Measurement Set, Dial Pulse, Touch Tone (DTMF) and Multi-Frequency (MF) Sender, and Talk Battery supply into one lightweight package. Hardware and software options allow the user to greatly increase the capabilities of the 930A. These options include: DP, DTMF, MF Receiver/Analyzer with Trunk Simulation SF Supervision P/AR Receiver/Transmitter 3-Level Impulse Noise RS-232C Remote Control/Printer Interface DS-1 PCM Transmit/Receive (Single or Dual-Direction) with D4/Superframe, Extended Superframe and SLC-96 Capability Type 105 ROTL/Interrogator/Responder (52A Format) Ring Generator/REN-3 Load LTTP/STTP interface (#1/1A ESS Switch) FXO/FXS Supervision Phase/Amplitude Jitter and Hits Measurement Non-Linear Distortion Measurement Envelope Delay Distortion Measurement DS-O/DS-1 Bit Error Rate Testing Enhanced 911 PSAP Simulation The Model 930A performs the three basic functions required of a DEMARC test set in today's environment. These are: Transmission Measurements, Signaling and Supervision, and T-1 PCM Drop/Insert (optional) testing. The Model 930A has been designed to access and perform tests on the following types of circuits: Equal Access (Feature Group D) Centralized Automatic Message Accounting (CAMA) Traffic Service Position System (TSPS) Toll International Direct Distance Dialing (IDDD) Data PBX Private Line Automatic Ringdown (PLAR) Manual Ringdown (MRD) Foreign Exchange Office and Station ends (FXO/FXS) (optional) DS-1 PCM Single Direction D4 Superframe and ESF (optional) DS-1 PCM Dual-Direction Drop/Insert D4 Superframe and ESF (optional) The Model 930A can simulate the telephone company central office or the terminating end of the circuit (Customer Provided Equipment, an Inter-LATA carrier, DEMARC, or Point of Presence).