IP Telephony

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.

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If I have a Skype for Business Online account  most folks reach me by a regular 10 digit telephone number.
But should people be able to reach me also at a sip address like sip://joebob@acme.com?
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Skype (Windows 10). The Video Button has disappeared from its position on right side top - alongside the telephone icon. Have tried for answers without success. What does this signify?
Has it anything to do with paying money.  It is not a problem with my computer, as I have opened the account on a second computer with same result.
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I need to firmware update a CISCO telephone (SPA 504G) to version 7.6.1
The problem is that the firmware update is needed to established as standalone.
Can i firmware update a CISCO telephone SPA504G standalone?
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related question/answer
https://www.experts-exchange.com/questions/29095322/2-phones-ring.html?anchor=a42537973¬ificationFollowed=206569166#a42538269

Using verizon wireless for residential (not business)
is there a way to have both phones ring at the same time

*71 is one phone and then the other
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I have an implementation of 3CX with soft phones . Recently i add also telephone (IP/VOIP) except of soft phone. the IP telephones are working properly but now  I need to export the contacts from the soft phone to IP telephone.

I am looking for a step by step instructions how to do it.
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could I have 2 incoming skype phone numbers

can I receive (not send) sms to skype united states phone number
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Anyone knows if there is a way to change a hostname in Polycom SoundStation 7000?   So it would broadcast an actual hostname instead of the make/model name.
Easier to manage and troubleshoot.
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I have a client experiencing voice quality issues and their voice vendor is asking us to perform some Wireshark packet captures.  They have a Netgear GS724TPv2 PoE switch, which supports port mirroring, so according to NEC's instructions I mirrored the ports the PBX and IP phone are connected to and made the port my laptop is connected to the probe port.  I run the captures, making test phone calls from the IP phone, but NEC is saying the captures aren't showing any SIP traffic to/from the PBX and the IP phone.  

I don't run packet captures very often so I'm hoping an expert out there can confirm if the configuration I am running the captures in is correct?  Thanks in advance!
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Does COMCAST have poor quality phone service?

I switched yesterday from Verizon FIOS to COMCAST and had terrible telephone calls today on the land line.

I think we were sold >100 GPS upload speed. So, I doubt the poor quality is due to a slow internet connection. But maybe the old Verizon FIOS phone number was what they called a POTS line, a Plain Old Telephone Service line. Those were the ones where you cold hear pin drop.

Did I move from a POTS Line to an Internet based phone? And is that the cause of the major drop in quality?

My new modem is...

Xfinity
Dual Band Wifi
802.11.ac

The phone cable goes into the back.

Would an Internet phone do better?

Is there anything I can do?

I really despise having poor phone quality and may go back to Verizon to escape a bad connection.

Suggestions?

Thanks
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I have a network with Cisco Catalyst 2960X switches. We are rolling out a new phone system in phases. We want to keep the old system in place as we put in the new phones. To this end, we need multiple voice VLAN's. Another question on here pointed to a solution using MAC Authentication Bypass, but it did not give an example configuration. I am not familiar enough with the VoIP side to configure this, can someone please assist? (BTW, the other phone system is Allworx.)

https://www.experts-exchange.com/questions/29020081/Multiple-Voice-Vlans-on-Cisco-switch.html
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How does DHCP work with VoIP phones?  Do they phones need to get restarted every time the DHCP lease expires?  Or it works no different than a regular computer client?
For the first time phones need to be booted to obtain IP addresses.  Also when DHCP or DNS server changes.  What about a regular DHCP refresh at the end of the lease duration?
We use Polycom ip phones over poe.
Please advice.
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I want to make a Call Manager unavailable for CIPC registration. What services would I need
to shut down so that any CIPC that attempts to connect goes to the secondary in its
configured list of CUCM servers?
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I've been tasked with the possibility of upgrading our offices phone system.
Our current phone system runs off CAT3. Newer systems CAT5 or better. Our network is pretty old. I don't have CAT5 everywhere there is a phone and not even everywhere there's a computer. Those users end up on wifi. Anyway, from what I gather we can use a passthrough on the phones to connect the phone then the computer back to the network. We've got about 55 users and about the same amount of phones in our main office. Our plan was to also roll out VPN phones to multiple locations as we have jobsite trailers all over several states.

Is it advisable to use the passthrough on these phones? Or is having a dedicated line going to be significantly better? We also have a few places in the building where I've had to add a few small switched and I'm concerned we'll get some call degradation because of this.

Like I said, our network is a bit older and a lot of it has been band-aid fixes by adding some wifi AP's and daisy-chaining a few small switches in some areas for additional personnel over the years.

Personally I'd love to have our building rewired but I'm not totally sure it's necessary, however I don't want to cause more problems or increase load on a network that's barely adequate as it is.

If you need more info from my I'd happily provide it. I'd like some advice from anyone else who's done similar upgrades or implemented phone systems on current networks.


Thanks
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I've got a NETGEAR  GS724T V4 Managed switch with a VLAN set up using the Auto VoIP setting for 6 ports to serve VoIP phones at a client's location. The other ports are set to default. The IP for the switch is 192.168.1.200.  The switch is on a 192.168.1.1 network.


1) Do I need to set up another subnet for this VLAN (192.168.2.1), or will these ports just be isolated from the traffic on the other ports of this switch.
2) If I do need to set another subnet, how do I set either static IPs or DHCP for these 6 ports on the subnet?

Thanks lots for your insight.
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Is there a way to setup a PBX phone at home that handles calls like a business without having to pay for a service?  If so, how would I go about doing that?
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i'm trying to add voice control to ubuntu 17.10.  i saw a video where the command "v-c" was added to ubuntu and somehow you could write code with it.  it says to write v-c<<help (i think) .  i tried to get help and my computer sayts the command does't exist
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I have on VLAN 3 (10.10.110/24) a PBX and VLAN 4 (10.0.112.0/24) IP phones.  routing between VLAN 1 and VLAN 2 is working.
On VLAN 1 (192.168.110.0/24) I have computers, W2008 DC, W2008 database.
I can ping from VLAN 1 the PBX on VLAN 3
I have setup the DC IP address as NTP server on the PBX. but I m seeing the status disconnected. That's probably mean from VLAN 3 I can"t reach the DC located on the VLAN 1

I am trying to find out how I can fix this to be able to synchronize the PBX and IP phones clock with the DC.

Any idea?
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We’re using a SonicWall TZ-215 firewall.  Our LAN X0 port is setup as 192.168.0.1—254, with 192.168.0.2 setup as the gateway, 255.255.255.0 as the subnet.  

We’re getting VoIP phones, and the vendor is setting them up with static addresses between 192.168.1.100—200, subnet 255.255.255.0.  How do I configure the SonicWall to get the phones to access the 192.168.0.2 gateway?  (X3—X6 interfaces are unused on the SonicWall, if needed for the solution)
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Our chairman calls his assistant and dictates emails over the phone for his newly hired assistant to type and send out. Sometimes she has difficulties to keep up with him and we really need a device, program or something for her to record his conversation and listen to again ?
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The 14th Annual Expert Award Winners

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Hello -

I'm looking for a solution for a portable conference phone. Currently I'm using a Polycom Soundstation that works with an analog line. The quality of sounds is obviously is not great so I was wondering if there is a more modern solution that could help with our needs. It would be for a room with about 20 people around a long table so I need to make sure there is decent range for them to be heard over the phone. I was looking into something like a Jabra Speak 710 UC Wireless Bluetooth Speaker device that would work with a cell phone but I'm worried about quality of sound over a cell phone connection pushed to a BT device.

Any help would be appreciated.
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Hi guys,
Just got a general question. When I walk into a environment, how do I find the phones are whether digital or analog ? Any way to find by looking at into phones ?
If phones has Ethernet cable , they are ip Phones. Like wise how do I differentiate between analog/ digital ?
What is sip trunk ?
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Here's an easy one for ya...  I've done this before in Google Voice but I can't seem to find the feature to enable forwarding to our VoIP system for whatever reason
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call 4 phone numbers at the same time.
Only 4 not 400. Not looking for an enterprise solution.


Maybe something that combines with google voice or skype.
Want to use windows 10 computer and regular headset.
Ideally no additional hardware but if hardware is needed for 4 phone numbers then
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Skype sound not working.  The sound works on other applications no problem. I've checked the device settings - done the audio test - has worked fine. Am running both Skype for business and "ordinary" Skype but they've lived happily together until now.  Try the Sound Echo test - not a peep out of it...any suggestions. Thanks.  Skype version 12.1803.279.0
Thanks
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Hi
We're being told that shoretel 14.2 will be EoL in the near future.  We're also being told that we will have to pay for the upgrade to connect.  Is this correct?  We have maintenance with shoretel and the supplier...
Also what issues are people experiencing with it?  I read that new communicator is pants..?
Thanks
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IP Telephony

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.