Nortel Networks CTA 500dm manual AT command problem?

Page 72

72 Troubleshooting

¥If the cable is faulty or the ICS is down, the attached phone will also not work.

AT command problem?

The CTA 500dm does not respond to AT commands sent from your PC.

¥Make sure that your PC, terminal or other DTE is conÞgured correctly.

¥Check the DTE connection. If the DTE is conÞgured as a DCE you may need a null modem cable.

¥Check that your PC or DTE is conÞgured to expect CD and CTS signals. See ÒSerial Interface Control LinesÓ on page 56 for more information.

¥Check that the CTA 500dm is in the command mode.

¥Check that your PC or DTE is conÞgured to provide a DTR signal. See ÒSerial Interface Control LinesÓ on page 56 for more information.

¥If the LED is ßashing quickly, refer to the ConÞguration section of this document.

¥Check that the CTA 500dm serial port is set to the correct baud rate (115200 is required for all cases except during a software upgrade) using ÒSerial Interface RateÓ on page 54.

Echoed AT commands from the CTA 500dm do not appear correctly on your PC, but the response messages appear correctly.

¥Check the echo option on your PC.

¥Disable echo if your PC displays duplicate characters. Enable echo if your PC does not display any characters.

¥See ÒSet Local EchoÓ on page 38 for more information.

AT response messages do not appear correctly on your PC but AT commands appear correctly.

¥If numbers are being returned to the PC instead of messages, change the message code setting on the CTA 500dm. See ÒVerbose ControlÓ on page 40 for more information. The numeric responses and indications are shown in ÒNumeric CTA 500dm responsesÓ on page 83.

¥Make sure that your terminal is operating in full duplex mode rather than half duplex mode.

CTA 500dm On Line Guide

P0873832 Issue 05

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Contents CTA 500dm CTA 500dm in the Digital NetworkCTA 500dm Internet access ApplicationsDial-Up Networking Data-to-data transfersCTA 500dm feature summary About this documentFirst-time setup First-time setup CTA 500 dm On Line Guide P0873832 Issue Installation and setup Wall mounting the CTA 500dm Shock hazardCTA 500dm bottom view Setting up the ICS Compact ICS Modular ICSSetting up the PC Configuration Configuring the PC serial port None of the above 14 Configuration Configure CTA 500dm to access PP/MP data calls Adding multiple CTA 500dm configurations Uninstalling the CTA 500dm Upgrading the CTA 500dm software18 Configuration CTA 500dm On Line Guide P0873832 Issue Installing Norstar Tapi SP Configure Tapi dialing propertiesInstalling Personal Call Manager Using PCM for the first time Page Resource sharing Installing Dial-Up Server Allowing access to your PCConnecting to a Windows 95 Dial-Up Server Connecting to Resources on the Dial-Up Server Method oneMethod two Click OK Resource sharing CTA 500dm On Line Guide P0873832 Issue AT commands Profile commands summary ProfileLoad Stored Profile Load Stored Profile on Start-upResult Codes State Write Active Profile to MemoryState commands summary Return to On-line Data State Enter Download StateGeneral commands summary GeneralEscape Sequence Result CodePage Request Identification View Parameters Set Local EchoSave Dial String Display Saved Dial StringVerbose Control Result Code Suppression ControlRegister commands summary RegistersCall Monitoring Result Code Selection Set S-Register Query S-RegisterRegister set Call Control commands summary Dial CommandCall Control Result Codes Answer Command Hook Command Outgoing Call Control commands summaryOutgoing Call Bearer Service Control Outgoing Call ControlIncoming Call Control Channel Speed ControlIncoming Call Control commands summary Incoming Voice Bearer Call RateSpeech Bearer Call Answer Control Audio Bearer Call Answer ControlData Bearer Call Answer Control Ringing IndicationsTCM Port Protocol Selection Command TCM Ports Protocol SelectionRate Adaptation Protocol Selection MP command summary CTI MUX ModeRate Multiplier Serial Interface commands summary Serial InterfaceSerial Interface Rate Set Parity Set Data BitsSet Stop Bits Serial Interface Control LinesSerial Interface Control Lines commands summary Flow ControlAT commands Value Use Not supported DCD Operation DTR OperationAT commands Value CTS OperationCalling Line ID DSR OperationRI Operation Calling Line ID commands summary Calling Line ID Delivery ControlResult Codes Calling Line ID QueryCaller ID Security Caller ID security commands summary Caller ID Security Mode SelectionAdd Number Delete Number Clear ListView List Summary of AT commands CTA 500dm On Line Guide Page XON/XOFF Page Troubleshooting Power problem?LED problem? AT command problem? CTA 500dm does not respond to AT commands sent from your PCData call problem? PC receives bad data after a data call connection CTA 500dm loses data after a data call connectionCTA 500dm hangs up during a data call Appendix For equipment with internal mains suppliesImportant Safety Instructions For equipment with external mains adaptersPlease Read Carefully Canadian and US Regulations Network Connection Canada, United StatesFor Class a Host equipment For Class B Host equipmentWarranty Information Address for warranty and repairs in the United StatesRate adaptation protocol specifications Point-to-Point ProtocolMultilink PPP Bearer Capabilities Link AssumptionsCTA 500dm LED Numeric CTA 500dm responses Initialization stringsDB-25 and DB-9 signal summary DB-25 connectionAcronyms used in this document DB-9 connectionCTA 500dm On Line Guide P0873832 Issue

CTA 500dm specifications

Nortel Networks CTA 500dm is a versatile and robust communications technology platform specifically designed to enhance network solutions for businesses and organizations. With a keen focus on delivering high-performance connectivity, the CTA 500dm serves as a critical component in managing voice, video, and data traffic within a unified communications environment.

One of the standout features of the CTA 500dm is its scalability. The platform supports a variety of deployment scenarios, making it suitable for organizations of varying sizes, from small businesses to large enterprises. This scalability allows for seamless upgrades and expansions, ensuring that businesses can adapt their network solutions to meet evolving demands without requiring a complete overhaul of their existing infrastructure.

The CTA 500dm incorporates advanced technologies such as Session Initiation Protocol (SIP), which is essential for facilitating real-time communication sessions, including VoIP calls and video conferencing. SIP allows for the integration of various communication channels, providing users with a unified experience while streamlining management for IT teams. Moreover, the platform supports Quality of Service (QoS) mechanisms, which help prioritize voice and video traffic to ensure optimal performance, reducing latency and enhancing the overall user experience.

Another characteristic of the CTA 500dm is its comprehensive security features. The platform includes robust encryption methods and authentication protocols to safeguard data and voice communications from potential threats. This is particularly vital in an era where cyber threats are increasingly sophisticated, ensuring that organizations can maintain secure operations while conducting vital communications.

Furthermore, the CTA 500dm is designed with user-friendliness in mind. Its intuitive interface simplifies management and configuration tasks, allowing IT administrators to efficiently oversee the system without requiring extensive training or specialized knowledge. Coupled with extensive monitoring and reporting tools, administrators can gain valuable insights into network performance and troubleshoot issues proactively.

In conclusion, the Nortel Networks CTA 500dm stands out as a powerful solution for organizations looking to optimize their communication infrastructure. With its scalability, support for advanced technologies like SIP, strong security features, and user-friendly management capabilities, the CTA 500dm delivers a comprehensive platform for modern communications, ensuring that businesses remain connected, productive, and secure in today’s fast-paced digital landscape.
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