Nortel Networks CTA 500dm manual PC receives bad data after a data call connection

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74 Troubleshooting

properties. Ensure ÒUse country and area codeÓ is deselected if using MP with two dial out numbers.

The PC receives bad data after a data call connection.

¥Make sure that the CTA 500dm and the remote device are set to the same rate adaptation protocol. See ÒRate adaptation protocol speciÞcationsÓ on page 80 for more information.

¥The remote device may be conÞgured for synchronous transmission. The CTA 500dm does not support synchronous operation.

The CTA 500dm loses data after a data call connection.

¥Make sure that the CTA 500dm and PC ßow control methods match. SeeÒFlow ControlÓ on page 57 for more information.

The CTA 500dm hangs up during a data call.

¥Check the setting of the DTR pin. See ÒDTR OperationÓ on page 59 for more information.

Data calls are established but Internal applications time out.

¥Check that the settings under TCP/IP properties match those of your ISP.

Data calls are made using MP and the connected pop-up says connected@128,000 bit/s but only one channel is active.

¥Only one channel may be available at the destination (for instance if the ISP is busy).

¥Check that you are subscribing to an MP capable service.

¥Only one channel is available in the outgoing line pool.

¥You are active on a voice call. If the voice call ends, a 128 kbit/s session will be established.

CTA 500dm On Line Guide

P0873832 Issue 05

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Contents CTA 500dm CTA 500dm in the Digital NetworkCTA 500dm Dial-Up Networking Internet accessApplications 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 CTA 500dm bottom view Wall mounting the CTA 500dmShock hazard 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 Method two Connecting to Resources on the Dial-Up ServerMethod one Click OK Resource sharing CTA 500dm On Line Guide P0873832 Issue AT commands Profile commands summary ProfileResult Codes Load Stored ProfileLoad Stored Profile on Start-up State Write Active Profile to MemoryState commands summary Return to On-line Data State Enter Download StateEscape Sequence General commands summaryGeneral Result CodePage Request Identification View Parameters Set Local EchoSave Dial String Display Saved Dial StringVerbose Control Result Code Suppression ControlCall Monitoring Result Code Selection Register commands summaryRegisters Set S-Register Query S-RegisterRegister set Call Control Call Control commands summaryDial Command Result Codes Answer Command Outgoing Call Bearer Service Control Hook CommandOutgoing Call Control commands summary 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 IndicationsRate Adaptation Protocol Selection TCM Port Protocol Selection CommandTCM Ports Protocol Selection Rate Multiplier MP command summaryCTI MUX Mode Serial Interface Rate Serial Interface commands summarySerial Interface 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 OperationRI Operation Calling Line IDDSR Operation Result Codes Calling Line ID commands summaryCalling Line ID Delivery Control Calling Line ID QueryCaller ID Security Add Number Caller ID security commands summaryCaller ID Security Mode Selection View List Delete NumberClear List Summary of AT commands CTA 500dm On Line Guide Page XON/XOFF Page LED problem? TroubleshootingPower problem? AT command problem? CTA 500dm does not respond to AT commands sent from your PCData call problem? CTA 500dm hangs up during a data call PC receives bad data after a data call connectionCTA 500dm loses data after a data call connection Appendix For equipment with internal mains suppliesPlease Read Carefully Important Safety InstructionsFor equipment with external mains adapters 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 StatesMultilink PPP Rate adaptation protocol specificationsPoint-to-Point Protocol 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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