Voice Over IP

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

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We have a small office of about 20 VOIP ringcentral phones.  I think that at max, 3 concurrent phone calls happen at a given time.  Perhaps 4 on the busiest moment.  What would be the appropriate amount of bandwidth to allocate for Qos on my sonicwall Bandwidth Management screen.  I have a hard time understanding how this screen is explained so if someone is able to explain what Realtime is and Medium and Guranteed vs. Maximum/Burst that would help.  Thanks
Sonicwall-BWM.png
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Calling on all Cisco CUBE Experts;
CUBE setup for SIP trunking that that talks to the provider's SBC missing SIP port (5060) in the SIP URI, can anyone shine light on why it is happening? Is there a tweak or hack
someone can suggest ? The IP address is coming fine, BTW.

Thanks;
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amazon connect - I use it as call center and use soft phone as well. it is fine. But now I want to add voip phone with amazon connect in the office.
Do you know how to set up? or where I can find some helps?
Thanks
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Hi,

We have a switch stack of 7 3750 switches. One switch just seemed to stop working, still has power. After restart, using the sh switch command, the switch seems to be stuck at initializing, after restart the of the stack, the switch shows ready. Its a POE switch and plugging a phone directly into the switch, no power. However plugging in a laptop works, data is working just not power no data. I used some basic commands, show config, ver, vlan, int and compared the configs to the other switches and everything looks good.  The switch in question has no error using sh int. Any suggestions greatly appreciated. Below is a output from sh int, for the switch in question,  all ports are shown the same.

FastEthernet5/0/20 is down, line protocol is down (notconnect)
  Hardware is Fast Ethernet, address is 0017.94b5.d016 (bia 0017.94b5.d016)
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 …
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SIP Provider Review, I have quote from Access Point Inc, I've never hear from the company before and bit skeptical where all their servers are. I don't to want SIP server siting on West end of country when our building is at East End.  Is anyone who experience with them? any feed back? or SIP provider who does good what they do?
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We use five 9 for our main call center and we want to expand to another state but we just want to hire someone or company that take the inbound call and out bound call using five 9

Do u know any call call can do this?
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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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I'm working at integrating Mitel 6867i phones into our network.  
At first, the provider said that there had to be firewall ports open (and, obviously NOT forwarded to any particular IP).  That is, the ports had to be opened incoming and outgoing.
Well, usually outgoing is open by default.  So that would only be mentioned to CYA.
And, if outgoing is all that's needed then saying incoming is needed seems double CYA.
Right?
My hope is that no firewall ports need be specifically opened at all.  

But, I started on this path by accepting what they specified and decided I would NOT run these things through our main firewall at all.
So, there will be a separate firewall as we have enough public IP addresses to accomodate.
And so, there has been a VLAN set up just to service the VOIP phones and to keep the firewall LANs separated.

I hope this much sounds like a reasonable approach.

If you're familiar with these phones (and I hope you are) then you'll know that the phones will accept a trunk line connection and "pass through" the main LAN / e.g. VLAN1 untagged to the computer on the desk.  (This saves running a new cable to the desk assuming the computer is already cabled).  And, the phone functions are supposed to run off a tagged VLAN / e.g. VLAN100 that's combined on the trunk.

All this seems fine so far.  I'm a little uncomfortable with the phones being so integrally connected inside the network but it seems like accepted practice.

As they say, "the devil is …
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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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We have warnings on some of our Cisco small business network switches; network performance/quality seems to be fine.

[21 Cisco PoE and non-PoE switches SG-200, SG-250HP and SG-500 currently on the network].
VoIP system configured throughout our network that has been up and running for the past 6 months without any problems.
The warning messages are recent, and came up on our SG-500 core switches [Flash memory logs]
Warning is declared as "%CDP-W-VOICE_VLAN_MISMATCH: Voice VLAN mismatch detected on interface X" - where X is the up-link port number connecting to core/edge switch.
Ports affected are all (only) up-links, core to core or core to edge.

*         All switches have the latest firmware installed

*         All configured with the same VLAN IDs (Default VLAN is 1 & Voice VLAN 30, configured trunk ports, separated tagged from untagged)

*         Dynamic voice VLAN disabled on all switches

*         Auto voice VLAN disabled on all switches

*         CDP enabled on all switches

*         Global settings for QoS trust mode is CoS/802.1p
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I need a small dual-WAN router to interface with an ISP for VOIP.
It needs to provide VLAN100 tagged on the LAN side (some older routers like RV042 won't do this).
It needs to have some ports opened - not forwarded, opened. (some newer routers won't do this).
I'd rather have a 4-5 port router as ports are unimportant here.
I'd like to add a management port/VLAN and block internet access from that port's connection.

What might you recommend?
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We are having a POE issue on some ports on a Cisco SG500-52MP.  About 5 users phones are not powering up.  We eliminated a cabling issue and a phone issue by plugging in the phones directly to the Cisco switch, however some ports are not powering up the phones.  For instance.

Joe's phone is not working and was plugged into port 25
Mary's phone is working and is plugged into port 41

If we swap phones, Mary's phone does not power up on port 25 and Joe's phone powers up on port 41.  This tells us something is going on with the switch.  We don't want to power cycle the switch just yet as other workstations are working.  The system has been up and running for about a year and no changes were made.

Is there something that we can look for on the switch itself to see why those 5 particular ports are not powering up the phones?
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I always get confused / use firewall / router rules so infrequently that I don't know  what the right way to set these things up.

Can you help?

I have a VOIP service using a Grandstream HT-502 V1.2A gadget.  The call quality isn't always good.  That device is plugged directly into one of the ports on an actiontec router (left over from when we had verizon fios, but now we have cable internet 15down / 5 up speed.

I have lots of other devices plugged into a gig network switch in the basement that might be using the internet at the same time as the calls?  That gig network switch has 1 cable going over to the actiontec also (so there's only 2 cables on the lan side of the router).

To improve call quality, that's a job for QoS, right?

The attached picture is what I did in the actiontec router.  The grandstream has the ip of 192.168.1.52

But then i thought, should this be on the Ethernet/Coax or  Broadband Connection (Ethernet/Coax) sections? Did I at least get outbound rather than inbound correct?

But that just gets the call out of the house with highest priority.  Once it's on the web, it's fighting with all kinds of data / can't prioritize it, right?

Does the VOIP provider have any bearing on the quality of the calls? Iwe are using VOIPO.com).  is there  a way to substantiate / test where the poor qiuality - dropped fractions of a second in the conversation, etc.  NO stuttering, max headroom type things.  Just a m ssing sound here and there.

And most …
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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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related question:
https://www.experts-exchange.com/questions/29095078/forward-phone-numbers-with-iphone.html#a42537163

Since you have Verizon, you can do this:

Calli *72 plus the forwarding phone number, including the area code (e.g., *72-555-555-5555). You will hear a confirmation message.

This works with all phones with Verizon service, not just iPhones.

Dial *73 to stop forwarding. You will get a tone or message.

Can I have both phones ring

I this answer only gives me second phone ringing.
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Need a voice support that is not TOO loud

I need to give a tour to about 10-20 people in a public area, but my voice does not carry very far. And if the wind is up, it's even harder.

But I do not want to use one of those megaphones. They are loud and use up one hand. I would prefer some sort of clip-on microphone, that uses BlueTooth to connect to portable speakers.

Can I WEAR a small speaker? Is that possible?

Or I guess I could pull a small speaker behind me, but that would also need a battery.
 
Suggestions?
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can I receive (not send) sms to skype united states phone number


not skype to skype message

receive actual text message from a cell phone
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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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I hope I can get some inputs from you on network design.
This electronics manufacturing company will be building a 2 storey, 100K square foot facility.
The mail floor - all the manufacturing machines, computers and servers running manufacturing software
The 2nd floor - the main server (Microsoft SBS), SharePoint Server, LOB software servers, and computers used by office staff and engineers.  

They have less than 200 employees, over 120 computers, 5 physical servers, some VoIP phones. They are all on the same network. Currently, there are only 28 IP free addresses available from the DHCP server (Microsoft SBS)

Here are my thoughts about the network in the new building
1. Install stackable switches in each floor's server room. Connect the two groups of switches via a long high speed trunk cable running thru the floor.
I think this will keep the network traffic on the main floor in the main floor network from the 2nd floor network, which optimize the bandwidth.
Currently, they are using D-Link DGS-1510-52 switches, which have been quite reliable, except that i had to power cycle one of them twice in the past years, and their firmware are a bit buggy.

Is it worth to deploy Cisco switches which are more expensive and cause a learning curve? Is there such a long high speed trunk cable at all?

2. Separate computer network, VoIP phone network and Security/Access Control network with 3 different networks.
This will release quite some IP addresses from the DHCP …
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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
1
skype windows10
automatically adjust microphone settings checkbox

does this reduce background noise

does this cause moments of silence

will I do better when speaking to a machine (voice to text)

what else does this checkbox do when checked/unchecked

automatically adjust
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Voice Over IP

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).