Technical Appendix Specifications for the RADIO SYSTEM UPGRADE

6. Multiple sub-rate per DS0 (RS-422/423 interface @ 1.2, 2.4, 4.8, 9.6, 14.4, 19.2 kb)7. 4-wire voice, E&M signaling8. FXO (office) end9. FXS (subscriber) end10. 2- and 4-wire voice, E&M signaling11. Private line ringdownF. Carrier and Equipment Performance Monitoring - Error Detection and Reporting. The digitalchannel bank shall continuously monitor the status of all elements or components of theequipment, including loopback testing. The digital channel bank equipment shall generate analarm in case of a malfunction, and respond to yellow, blue and out-of-frame alarms receivedon the DS1 span.The performance monitoring parameters and thresholds should be provisioned from a localinterface or from a remote workstation.G. Test Access. Test Access, Loopback function (hard, soft, or both) shall be provided. Metallictest access shall be provided via faceplate mounted bantam jacks. A software configurableoption shall be available with the Intelligent Access Multiplexer. The digital channel bankshall have the following maintenance features:1. Front-panel mounted ACO cutoff switch, front-panel mounted bantam jacks for testingand alignment;2. Digital 1-kHz and quiet code sources for channel unit testing or alignment;3. Dry, Form-C, relay contracts (rated at 48V dc, 1 amp) for office alarm; local channelloopback;4. LED status indicators, such as ACO, power on, power failure, PCM fail, frame loss, andtrunk processing. It also processes and displays local alarms and remote alarms.H. Loopback. The digital channel bank shall provide the following loopback capabilities:1. Local Transmit Test Loopback2. Local Transmit AIS Loopback3. Network Loopback4. Channel Unit and CSU LoopbacksI. Local Alarm Notification. The digital channel bank shall provide a channel bank control,alarm, and monitor module that can display alarm status and provide the function of controlfor the equipment configuration. The feature should be built into the line interface unit(LIU). The LIU shall have front-panel LEDs that indicate local and remote alarms. It alsoshall have dry relay contacts for external audible and visual alarms. The digital channel bankequipment shall have the following trunk port (common equipment) visual indicators:1. Line Interface Unit (LIU)City of San Luis Obispo 46 Radio System Upgrade TECHNICAL APPENDIX