News
Voice networking and VoIP
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November 16, 2006
16
Nov'06
How can a small business achieve high quality VoIP?
As a small trader, I must be able to communicate with my trading partners who are often in other countries. We use IP telephony to keep costs down. Can you suggest how I can have high quality VoIP calls that will exceed PSTN call quality?
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November 16, 2006
16
Nov'06
Why do VoIP calls remain active after the phone call is ended?
For our small business needs, we use a Linksys PAP for our IP telephony service. Sometimes though, we noticed that the call will remain active after we have ended the call and hung up. How do we configure the ATA or gateway to avoid this problem?
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November 16, 2006
16
Nov'06
Why is UDP used more in VoIP than TCP?
If UDP is unreliable, why is it used more in VoIP rather than TCP?
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November 16, 2006
16
Nov'06
What is the difference between VoIP, CTI and IP telephony?
What is the difference between VoIP, CTI (Computer Telephony Integration) and IP telephony?
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November 16, 2006
16
Nov'06
Can VoIP work on a GPRS-enabled mobile phone?
Is it possible to use VoIP on GPRS-enabled mobile phones?
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November 16, 2006
16
Nov'06
When should a VoIP system be analyzed and with what tools?
We have recently implemented a VoIP network with separate VLANs and QoS. It all seemed to be working fine when it first went in, but recently, certain people have been complaining about sound breakup whilst talking to customers on the phone.
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November 16, 2006
16
Nov'06
VoIP news briefs: Verizon Business, TheInfoPro and Ovum
Verizon Business introduces a new management portal; TheInfoPro looks at the rate of VoIP adoption; and Ovum warns of VoIP security threats.
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November 15, 2006
15
Nov'06
How is average repair time determined for both a TDM PBX and a VoIP system?
I am trying to find some statistics on average time to repair or troubleshoot VoIP and TDM PBX. We heard PBX takes 30 minutes versus VoIP at 4.5 hours -- is this true?
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November 15, 2006
15
Nov'06
How can VoIP be integrated into an existing PBX system?
I am trying to integrate VoIP into my existing PBX system. I have a Talkswitch 48CVA which supports both PSTN and VoIP lines. My main phone number is a landline which forwards calls to my VoIP line when my status is busy or I do not answer.
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November 14, 2006
14
Nov'06
SANS: VoIP, zero-day threats surge
Digital miscreants are using VoIP and a growing pile of zero-day flaws to launch a ferocious wave of targeted, financially-motivated attacks, according to the SANS Institute.
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November 13, 2006
13
Nov'06
IM, Skype, P2P open security holes: Survey
IM, Skype, Web conferencing and other real-time applications are a major concern to IT, but end users seem to shrug off the risks, a new survey has found.
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November 08, 2006
08
Nov'06
VoIP security safeguards -- they may be there already
Protecting your VoIP system may be easier than you think, especially since many of the necessary tools are already there.
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November 01, 2006
01
Nov'06
Juniper Networks' enterprise router takes aim at Cisco branches
Juniper's new branch office J-Series routers provide all-in-one security, VoIP, WAN acceleration box to rival Cisco's ISR router.
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November 01, 2006
01
Nov'06
VoIP convergence: Managing staffing issues
Companies making the transition to IP telephony must find a way to converge their voice and data networks -- and the employees who work on them.
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October 31, 2006
31
Oct'06
Net neutrality: All or nothing, or somewhere in between?
The notion of net neutrality can hinder VoIP QoS guarantees and thus has incited a contentious debate.
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October 25, 2006
25
Oct'06
Cisco launches mega videoconferencing system
Cisco Systems Inc. has talked about TelePresence and demonstrated it, and now it's finally something enterprises can buy, but at six figures it's a high price to pay.
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October 24, 2006
24
Oct'06
How does the service provider differentiate between data and VoIP as data?
For our mobile devices in trucks, we use GSM/GPRS communication. Our customers are paying for a certain data amount -- depending on the service package to which they subscribe. We use a modem in our device, which can do both data and voice. But as I...
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October 23, 2006
23
Oct'06
Comparing VoIP vendors
For many companies, the tough decision isn't whether to use IP telephony or not -- it's which vendor to choose. We've collected some of Carrie Higbie's tips and tricks for vendor selection, garnered from her "Ask-the-Expert" section. Carrie ...
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October 23, 2006
23
Oct'06
Comparing VoIP vendors
For many companies, the tough decision isn't whether to use IP telephony or not -- it's which vendor to choose. We've collected some of Carrie Higbie's tips and tricks for vendor selection, garnered from her 'Ask-the-Expert' section. Carrie ...
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October 22, 2006
22
Oct'06
EMC plays catch-up with Clariion
Clariion arrays now have support for both Fibre Channel and iSCSI in one box, as well as other features that competitors have been using against EMC for some time.
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October 19, 2006
19
Oct'06
Xiotech, Pillar scale down, support iSCSI
Xiotech, Pillar introduce entry-level iSCSI arrays; Overland loses Dell deal; EMC and IBM report earnings.
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October 16, 2006
16
Oct'06
Cisco ramps up unified communications tools
Cisco last week released a host of new products to enhance its suite of unified communications tools, including an IP phone that's easier for end users to accept.
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October 11, 2006
11
Oct'06
Does Spanning Tree Protocol have an adverse effect on VoIP?
Do you know if Spanning Tree has an adverse effect upon VoIP? If so, what is the best way to provide LAN-based switch redundancy to VoIP gateways?
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October 11, 2006
11
Oct'06
Briefs: VoIP management; mobile E911; and Windows 2003 support
Qovia releases its new VoIP management system; 911 Enable made E911 mobile and Codima announced support for Windows 2003 server.
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October 01, 2006
01
Oct'06
Column: The myths and realities of VoIP security
Security is often cited as one of the primary reasons organizations have not deployed VoIP. The biggest VoIP security threat is not making headlines. Zeus Kerravala, Yankee Group analyst, cuts through the hype so network managers can maximize the ...
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September 26, 2006
26
Sep'06
Voice over IP Fundamentals: Chapter 9, 'Billing and Mediation Services'
Voice over IP Fundamentals: Chapter 9, 'Billing and Mediation Services'
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September 25, 2006
25
Sep'06
IP telephony unites New Orleans nonprofit after Katrina
Hurricane Katrina nearly disbanded the Catholic Charities Archdiocese of New Orleans, until the nonprofit rolled out a hosted voice solution
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September 18, 2006
18
Sep'06
VoIP user experience tested
Most VoIP monitoring is focused on quality of service, but one new company is taking a different tack and looking at the quality of experience.
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September 14, 2006
14
Sep'06
Calling network management vendors: It's time to get on board with VoIP
Despite the hype, full-scale VoIP deployments are hard to find. According to our research at Yankee Group, over 80% of U.S. enterprises have VoIP deployed somewhere in their organization in some shape or form. This includes departmental trials and ...
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September 12, 2006
12
Sep'06
Is there a generic blueprint for an IP-based call center?
Is there a generic blueprint for an IP-based call center? Where could I find one?
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September 11, 2006
11
Sep'06
VoIP still a confusing area for SMBs
A study released at today's VON conference in Boston suggests that SMBs -- despite their growing use of VoIP -- are still confused about VoIP technology.
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September 06, 2006
06
Sep'06
VoIP startup untethers would-be mobile workers from wireline office phones
VoIP startup DiVitas Networks has voice-over-WiFi-to-cellular technology in the works that gives endusers access to enterprise apps and puts dual-mode handset management in the hands of network administrators.
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September 06, 2006
06
Sep'06
Fast Guide: VoIP encryption
A guide to encryption within VoIP networks
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September 06, 2006
06
Sep'06
VoIP startup untethers would-be mobile workers from wireline office phones
VoIP startup DiVitas Networks has voice-over-WiFi-to-cellular technology in the works that gives endusers access to enterprise apps and puts dual-mode handset management in the hands of network administrators.
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September 05, 2006
05
Sep'06
VoIP outsourcing: Save money and gain flexibility
VoIP outsourcing is the way to go for organisations looking to deploy voice services quickly and flexibly without a major investment in skills and upkeep.
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September 05, 2006
05
Sep'06
VoIP outsourcing: Save money and gain flexibility
VoIP outsourcing is the way to go for organizations looking to deploy voice services quickly and flexibly without a major investment in skills and upkeep.
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September 04, 2006
04
Sep'06
Revamped Cisco WAFS worth the wait, users say
Months late, Cisco has finally released a combined Wan optimisation and WAFS product, while startups like Riverbed have been snapping up the customers. But some Cisco beta testers say it has been worth the wait.
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September 04, 2006
04
Sep'06
Instant messaging boom brings security concerns
Instant messaging (IM) has made significant inroads to the enterprise, but using public IM applications may open up security holes in the network.
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August 30, 2006
30
Aug'06
VoIP outsourcing: Save money while gaining flexibility
VoIP outsourcing is the way to go for firms looking to deploy voice services quickly and flexibly without a major investment in skills and upkeep.
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August 29, 2006
29
Aug'06
AT&T breach affects 19,000 customers
Online outlaws hacked into an AT&T computer system and stole credit card data on thousands of customers. AT&T has offered to pay for credit monitoring services for those affected.
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August 22, 2006
22
Aug'06
Column: VoIP applications fuel the next wave of VoIP innovation
The first phase of VoIP is nearing the end and corporations will soon find a variety of third-party desktop applications that run on VoIP. Has VoIP improved the day-to-day for end users?
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August 21, 2006
21
Aug'06
Briefs: VoiceCon in the news
This week at VoiceCon we saw everything from managed VoIP services to IP phones made to make mobile workers right at home, wherever they are.
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August 16, 2006
16
Aug'06
Cisco struggles with SIP firewall flaw
Cisco admits it can't reproduce a SIP security flaw in its PIX firewall that was first identified by a researcher at Black Hat.
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August 16, 2006
16
Aug'06
Briefs: VoIP in the news
Asterisk maker Digium gets major funding; Quintum's VoIP switch offers backup option for branch office; The Cisco Store makes the case for unified communications.
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August 15, 2006
15
Aug'06
Cisco boosts VoIP certification
The upgraded CCNP midlevel Cisco certification now incorporates VoIP, security and wireless to boost converged network skills among enterprise professionals.
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August 15, 2006
15
Aug'06
Cisco says it can't reproduce PIX flaw
Ever since a researcher at Black Hat outlined a flaw in the PIX firewall, Cisco has been trying to reproduce the security hole. So far, the company has been unsuccessful.
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August 06, 2006
06
Aug'06
VoIP call quality on the decline
Advances in technology have made VoIP more common, but that hasn't stopped VoIP call quality from dropping steadily over the last 18 months, according to a recent study by Brix Networks.
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August 03, 2006
03
Aug'06
Vendors reject preferential knowledge sharing
While Cisco continues to investigate a potential PIX firewall flaw, it and other vendors say sharing security information quickly and indiscriminately is always the best policy.
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August 02, 2006
02
Aug'06
Possible Cisco zero-day exploit revealed at Black Hat
Details of an alleged flaw related to SIP and PIX appliances, briefly mentioned in a Wednesday Black Hat presentation, are being kept under wraps as Cisco and US-CERT investigate.
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October 12, 2005
12
Oct'05
Quiz: What's your infosec IQ?
We've collected our toughest questions to see how well you stand up to a challenge. Put your knowledge to the test and let us know how you do.