The TAS Apollo 802 ISDN Emulator provides end-to-end ISDN switching capability along with bit oriented impairments, such as framing errors and D-echo (E-bit) manipulation. Apollo 802 effectively tests ISDN TA/TE devices, such as ISDN telephones and ISDN terminal adapters. By combining switching capability with impairments, Apollo dramatically reduces the cost and complexity of ISDN TA/TE test configurations. Apollo Features ISDN Network Simulation - Apollo provides two NT terminations for ISDN TA/TE access, and supports switching functionality for end-to-end call placement. Switching functionality makes it easy to conduct performance testing of ISDN CPE devices and verify call control software. Network Impairments - Apollo provides two network impairments to test conformance to CCITT 1.430 standards. These impairments are framing errors and E-bit manipulation. Injecting framing errors corrupts the frame synchronization required by ISDN CPE devices. E-bit manipulation provides user-programmability of the D-echo bit channel. These features allow 1.430 conformance testing to be performed quickly and easily. Apollo 802 also allows manual control over the 1.430 Activation/Deactivation sequence. Built-In NT Status Monitor - Apollo displays the network states for each NT termination. The displays indicate Layer 1 network states (G states) and indicate when Layer 2 (LAPD) is established. Built-In Call Progress Monitor - The built-in call progress monitor displays network side Q.931 call states for easy verification of terminal software operation. B and D Rear Panel I/O - Rear panel access allows B channel monitor/insertion capability and D channel monitor capability. Independent digital ports exist for the B and D channels, as well as an analog port for B channel information. S/T Line Monitor and S/T Trigger - The S/T line monitor supports oscilloscope connection. This port allows monitoring of the 192 kb/s bit stream on the ISDN S/T interface. The S/T trigger is programmable, which enables you to zoom in on any section of the bit stream. Remote Control - RS-232 and IEEE-488 (GPIB) control are standard with Apollo. Remote control commands are simple and easy to use, and are the same regardless of the remote control method. This makes it easy to include Apollo in automatic test systems. RS-232/GPIB Command Translator - Apollo can act as the GPIB controller in an automatic test system. The controller issues commands to Apollo via RS-232, and Apollo controls the rest of the test station via GPIB. This allows any standard PC to act as a GPIB controller without additional GPIB control hardware or software. Software Cartridge * The feature set lor Apollo resides on a plug-in software cartridge. You can easily add new test capabilities and different switches as they become available.