The DCOSS converts any windows based PC (Windows 2000/XP) into a central office complete with T1 and/or E1 trunks as well as Analog and/or BRI ISDN phone interfaces. The DCOSS supports a multitude of protocols including CAS, PRI ISDN, SS7 and GR-303. The DCOSS supports manual and automated Bulk Calling and can simulate a wide variety of traffic.

The DCOSS APS (Analog Phone Simulator) converts a GL DCOSS into an analog phone simulator that simulates a bank of up to 384 analog telephones. Using a basic DCOSS with T1 trunks along with the APSCB24/48 external boxes, the DCOSS APS may be used to test a Central Office (CO), PBX, Gateway, or other telecommunications equipment, which provide local loop interfaces. The DCOSS APS can generate/receive analog calls and send/receive fax, modem, voice files, DTMF/MF digits and Single/Dual Frequency Tones. The DCOSS APS can be executed in manual mode or automated Bulk Calling with scripting support.

The BRI Phone Simulator (BPS) converts GL's DCOSS into a BRI ISDN Terminal Phone Simulator. The BPS can simulate a bank of up to 128 BRI telephones (terminal side), each supporting one D-channel and two B-channels. Using a basic DCOSS with E1 PRI ISDN trunks along with a BPS external box, the DCOSS BPS may be used to test a BRI Network.

GL's VQuad™ w/ FXO Analog option along with Voice Quality Testing (VQT) provides the complete automated network testing solution including four analog 2-wire interfaces (RJ-11) and the voice quality measurement and analysis tools. The analog ports may be connected to any US or European PSTN and, using the user-friendly GUI, the user can place calls to any desirable number as well as answer incoming calls in a manual or automated manner. The product can be configured manually to send and record voice files or configured to automatically send/record a multitude of voice files to be used in the VQT algorithms.

GL's SIP Bulk call Generator allows a user to generate single or multiple SIP calls over the IP network. The SBCG can be configured to send thousands of calls per hour, with or without RTP traffic. As an option to the SBCG, a user can generate real-time RTP traffic including voice and data (Fax, Modem).