Expert Knowledgebase
Voice over IP with Patrick Ferriter
What is the difference between gateway and gatekeeper?
(21 JUN 2004)
What is the difference between gateway and gatekeeper? Is it possible to use a Cisco 2600 router as a gateway and if it is -- then do I need a separate SIP proxy server again for Authenticating IP phones. Can i...
Are there vendors available who can provide entire solution including supply of gateways, gatekeepers, proxies, and IP phones?
(21 JUN 2004)
Are there vendors available who can provide entire solution including supply of gateways, gatekeepers, proxies, IP phones and accounting software? What could be the acceptable range of incurred costs to set up ...
Can you help me understand guaranteed CIR?
(21 JUN 2004)
In a Frame Relay Network implementing Voice/IP where the CIR is set for example at 512k -- what happens if there is network congestion sufficient enough for the carrier to discard packets not marked DE (discard...
I'm confused about the term "IP Centrex." Can you explain?
(21 JUN 2004)
I'm confused about the term "IP Centrex." Can you explain?
Do you know if there is a program I can use to monitor VoIP call traffic?
(21 JUN 2004)
Do you know if there is a program I can use to monitor VoIP call traffic?
Could you help me with some questions on setup a VoIP termination system using Cisco 2610?
(21 JUN 2004)
I am planning to set up a VoIP termination system using a Cisco 2610 equipped with a VWIC MFT-T1 connected to a Channel Bank type ADTRAN TSU 600e (populated with 24 FXO ports), TSU 600E will be connected to onl...
What do you see as the future trends of VoIP?
(21 JUN 2004)
What do you see as the future trends of VoIP?
Can you give me an overview of VoIP?
(21 JUN 2004)
Can you give me an overview of VoIP?
Do you know of an application that can measure jitter, latency, packet loss and bandwidth?
(21 JUN 2004)
I have been searching for a VoIP network analysis software tool similar to Network Associates Sniffer for Voice. But with a limited budget of $2500 this has been difficult to find. Do you know of any such packa...
Is it possible to have a gateway solution without e1pri circuits?
(21 JUN 2004)
For a VoIP gateway solution is it possible to do this without e1pri circuits -- we have no digital circuits available? Even for dialup Internet connection we take analog lines from our local Telco and terminate...
How can I configure QoS on a Net2phone 2-port VoIP gateway?
(21 JUN 2004)
How can I configure QoS on a Net2phone 2-port VoIP gateway?
Presently my voice quality is terrible. Am using a C Band VSAT with intersky gateway and 64/128 kbps bandwidth.
What direction should a municipality take in moving to VoIP?
(21 JUN 2004)
I am commissioner of telecommunications for a city in Illinois. We are a growing community of 50k, and we are exploring replacing current municipal communications (wireline SBC) with VOIP.
We are starting ...
Troubleshooting dial tone on VoIP phone system
(21 JUN 2004)
I have implemented VoIP on a pure IP network. I had to use VPN to make it work. Now is it takes a long time for the dial tone to come up on any of the phones at one particular site. Where do I begin troubleshoo...
Can you recommend some VoIP books, specifically for the protocol breakdown?
(21 JUN 2004)
Are there any books that you would recommend to someone that has an interest in learning VoIP? Specifically for the protocol breakdown and the concept of its functionality.
Once a VoIP call is transferred to the PSTN how do IXC's and local telephone companies determine if there are any terminating charges that need to be applied?
(21 JUN 2004)
Once a VoIP call is transferred to the PSTN how do IXC's and local telephone companies determine if there are any terminating charges that need to be applied?
For a prepaid calling card platform, what are the advantages and disadvantages of SIP over RADIUS?
(21 JUN 2004)
For a prepaid calling card platform, what are the advantages and disadvantages of SIP over RADIUS? I have some networking background but I am not SIP expert, and I would really appreciate your help on this, sin...
Is it possible to have both extension and cordless phones for VoIP?
(21 JUN 2004)
Is it possible to have both extension and cordless phones for VoIP?
Do you have any information on the Motorola VT1000 with the Cisco call manager?
(21 JUN 2004)
Do you have any information on the Motorola VT1000 with the Cisco call manager? I am currently using the Cisco ATA, but the VT1000 caught my eye.
We want to terminate international mobile traffic via VoIP. Can I do it with this setup?
(21 JUN 2004)
We want to terminate international mobile traffic via VoIP. Our setup is:
Internet-->router/switch-->Quintum Tenor D3000 --> Ericsson MD110 --> Nokia 22 --> GSM.
I will also have a Quintum Tenor A800 ...
What level of monitoring and reporting is adequate for VoIP?
(21 JUN 2004)
What level of monitoring and reporting is adequate (our system integrator is suggesting Packeteer and NetIQ)?
Is it possible for someone to "tap into" the network and capture VoIP sessions/calls much in the same way that can be done on the data network with Sniffer type products?
(21 JUN 2004)
Is it possible for someone to "tap into" the network and capture VoIP sessions/calls much in the same way that can be done on the data network with Sniffer type products?
What is FXO and FXS?
(21 JUN 2004)
What is FXO and FXS?
Can you tell me the advantages and disadvantages of V5.2 interface and E1, PRI ISDN?
(21 JUN 2004)
Regarding VoDSL, we need a voice gate way to communicate with PSTN. We can use V5.2 interface or E1, PRI ISDN. Can you tell me the advantages and disadvantages of each?
Is IntServ/RSVP a good solution for IP radio access network or is DiffServ a better model?
(21 JUN 2004)
Does it mean that when the mobility issue with VoIP in mobile network is solved, we can have QoS for the next generation all-IP network? Can the quality matched up to what we have in GSM or PSTN? Is IntServ/R...
Do you know of anyone who manufactures a VoIP system for people who do not have DSL or Broadband?
(21 JUN 2004)
Do you know of anyone who manufactures a VoIP system for people who do not have DSL or Broadband? In other words is there any product out there for those of us who use the old fashion dial up to get connected t...
How does my 8308xl need to be configured in order to place phones on a different VLAN when they boot up?
(21 JUN 2004)
I am using HP Procurves on are network, we are using a 8308xl as our main switch. How does my 8308xl need to be configured in order to place phones on a different VLAN when they boot up? We have a Linux DHCP ...
Can VoIP be considered a telephone service and deemed to be illegal?
(21 JUN 2004)
Can VoIP be considered a telephone service and deemed to be illegal?
We cannot terminate calls between dissimilar phone systems using VoIP. What can we do?
(21 JUN 2004)
In our organization, we have fourteen sites. Some of these sites already have MD110 phone systems while we have installed some BP128 phone systems on some sites.
Our problem: We cannot terminate calls betwe...
What is the difference between H.248 and H.323? And what are the differences between ATM and FR technologies?
(21 JUN 2004)
What is the difference between H.248 and H.323? And what are the differences between ATM and FR technologies?
What are the programming possibilities for development in VoIP?
(21 JUN 2004)
What are the programming possibilities for development in VoIP?
Can VoIP be used together with network faxing software? If yes, is it as reliable and robust, as a normal telephone line?
(21 JUN 2004)
Can VoIP be used together with network faxing software? If yes, is it as reliable and robust, as a normal telephone line?
Does VoIP require QoS even though the WAN link has so much bandwidth to be able to handle data/voice traffic?
(21 JUN 2004)
Does VoIP require QoS even though the WAN link has so much bandwidth to be able to handle data/voice traffic?
How we can relate VOIP and IPV6? Is there any connection between the two?
(21 JUN 2004)
How we can relate VOIP and IPV6? Is there any connection between the two?
Are there any IP to Analog converters available?
(21 JUN 2004)
We have a Nortel succession 1K system. All remote sites talk to the Call server using IP phones only. No remote unit is available.
We need to install a fax machine on one of our remote sites which is connect...
Is there a Q931 SIP interworking document?
(21 JUN 2004)
Is there a Q931 SIP interworking document?
Do you know of any applications that are potential weak spots of VoIP?
(21 JUN 2004)
Do you know of any applications that are potential weak spots of VoIP?
I am using VoIP source code on Linux by Free Software Foundation and running into a few problems. Can you help?
(21 JUN 2004)
Our VoIP code works fine, if we test it from a PC directly accessing the Internet using a dialup modem! But the same code doesn't work on a machine which is on LAN having Internet access through lease line. We ...
What causes one-way conversation in a VoIP network?
(21 JUN 2004)
What causes one-way conversation in a VoIP network?
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