Problem solve

Problem solve

Get help with specific problems with your technologies, process and projects.

• What is the difference between ground start signaling and loop start signaling?

  Learn about the fundamental differences between ground start signaling and loop start signaling in this expert response. Continue Reading

• What is the difference between a SIP-enabled phone and an IP phone that is not SIP-enabled?

  Learn about the differences in programming a SIP-enabled phone versus a phone that is not SIP enabled, and the costs and benefits of each. Continue Reading

• Cisco tools vs. Prognosis

  What network management IP telephony vendors do a good job with Cisco Unified Call Managers? What are the pros and cons of using Integrated Research's Prognosis vs. Cisco's own tools? Continue Reading

• What kind of compression is used in VoIP?

  Our voice expert explains what kind of compression is used in VoIP, in this expert response. Continue Reading

• What is the difference between an analog and a digital PBX?

  Expert Juan Pablo Pazos compares an analog PBX versus an IP PBX to a reader wondering whether or not PBXes were replaced more than twenty years ago by digital PBXes. Continue Reading

• VoIP services overview: Defining VoIP terms

  The vast majority of conversations about the convergence of voice and data could benefit greatly from a generally accepted vocabulary. The primary culprits in this smorgasbord of confusion are the terms "VoIP" and "IP telephony," which are used ...Continue Reading

• How does a computer on the network get its IP address?

  How does a computer on the network get its IP address?Continue Reading

• How does an ATA work?

  How does an ATA work?Continue Reading

• TFTP servers for testing IP phones

  Testing a software upgrade on a single IP phone can present a challenge. In this tip, learn how to implement your own TFTP server for testing your phones' configuration information.Continue Reading

• What are the advantages and disadvantages of MPLS?

  Learn the advantages and disadvantages of MPLS in this expert response from our telecommunications expert.Continue Reading

• Five VoIP security recommendations

  Before beginning a successful VoIP rollout across your organization, there are several things you should consider.Continue Reading

• SIP interoperability and testing

  Session Initiation Protocol (SIP) is a signaling protocol typically used for telephony, instant messaging and Internet conferencing. This article discusses the interoperability and testing being done to support this protocol.Continue Reading

• How many calls can a T1 handle and what is bandwidth of each call?

  Our site member is planning a VoIP implementation at his company. He asked, "How many simultaneous calls can be handled by a T1 and what is the bandwidth for each call?" Get the expert answer here.Continue Reading

• Hardware and software required to set up basic VoIP service

  Get details and resources to find the hardware and software you will need to set up VoIP at your company. This basic overview offers information on IP/PBXs, SIP equipment, IP phones, Softphones and E911.Continue Reading

• CDP and multi-vendor networks don't mix

  Cisco switches and CDP go hand-in-hand, but when non-Cisco switches and CDP meet, interesting things happen.Continue Reading

• Nice Logger explained

  Learn what Nice Logger is and what types of telephony cards it supports in this expert answer.Continue Reading

• Defining traffic telecommunications style

  There are three types of traffic: voice, data and image -- each with its own set of requirements for transmission. Find out here how these different types of traffic are quantified.Continue Reading

• What is tromboning?

  In this expert reply, Patrick Ferriter explains what tromboning means in VoIP.Continue Reading

• Turning analog phones into VoIP phones

  How an ATA or broadband phone works and what kind of features and performance you can expect from them.Continue Reading

• IP telephony implementation planning

  Expert advice breaks down a successful IP telephony implementation into two distinct and easy to understand steps.Continue Reading

• Understanding customer acceptance

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• DHCP lease renewal on IP phones

  Learn how to handle DHCP lease renewal on IP phones in this expert response.Continue Reading

• Comparing IP with ATM networks

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• Working with the Layer 2 data link layer in an IP telephony deployment

  This IP telephony deployment article provides solutions to performance issues in Layer 2, the data link layer.Continue Reading

• ADSL bandwidth

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• Difference between data communications and IP based solution

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• Difference between gateway and router

  Learn the difference between a gateway and a router in this Ask the Expert response.Continue Reading

• Learn IT in 10 easy steps: VoIP

  This handy guide to VoIP provides you with an overview of the technology, including key terms, trends, challenges and more.Continue Reading

• System components of VoIP

  This is the second tip in a series excerpted from a report by Ohio State University. The report analyzes issues and challenges in the evolving VoIP technology.Continue Reading

• What exactly is SIP and what are its advantages and disadvantages?

  Learn about the advantages and disadvantages of choosing SIP over H.323 or another VoIP traffic carrier.Continue Reading

• We want to use VoIP over the LAN without PBX hardware. Any suggestions?

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• VoIP gateways and SS7

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• Policing and shaping within QoS

  Learn about the policing and shaping methods within QoS that allow IT professionals to smooth traffic flows for VoIP transmission.Continue Reading

• I'm confused about the term "IP Centrex." Can you explain?

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• What is the difference between Cisco call manager and Cisco SIP Proxy server?

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• What is the difference between gateways and gatekeepers?

  Learn what the difference is between a network gateway and a gatekeeper in this Ask the Expert response.Continue Reading

• DHCP for VoIP

  Learn how to set up DHCP for Voice over IP (VoIP) in this article.Continue Reading

• Don't forget to use multicast

  The benefits of using multicast.Continue Reading

• Survivable remote site telephony

  Fault-tolerant telephony solution for smaller remote sites.Continue Reading

• A case of the jitters

  Testing for specific problems affecting VoIP.Continue Reading

• Watch out for asymmetrical routing

  Asymmetrical routing can cause trouble that's tough to diagnose.Continue Reading

• Enable the hookflash relay

  How to enable it. You'll need it.Continue Reading

• VoIP user experience questionnaire

  VoIP user experience questionnaireContinue Reading

• Tune spanning tree for VoIP

  Tuning settings to account for the vagaries of spanning tree protocol.Continue Reading

• Testing VoIP connectivity on IOS

  An undocumented command that makes testing easy.Continue Reading

• Private line automatic ringdown

  How you can connect two phones to one another exclusively via VoIP.Continue Reading

• Check for full duplex capability

  How to find out if hardware supports full duplex record and playback.Continue Reading