Download top and best high-quality free Call PNG Transparent Images backgrounds available in various sizes. To view the full PNG size resolution click on any of the below image thumbnail.
License Info: Creative Commons 4.0 BY-NC
A telephone call is a link between the called party and the calling party through a telephone network.
Alexander Graham Bell made the first telephone call on March 10, 1876. By sending a call to his assistant, Thomas Watson, Bell proved his ability to “talk with electricity.” The first words transmitted were “Mr. Watson, come here. I want to see you.”
Because it represented the first effective telephone use, this event has been dubbed Bell’s “biggest success.” He refused to have a telephone in his own house, despite it being his biggest achievement, because it was something he developed by accident and regarded it as a distraction from his major research.
A telephone call can convey standard voice transmission, data transfer when the calling and receiving parties use modems, or facsimile transmission when they use fax machines. The call can be made via landline, a cell phone, a satellite phone, or a combination of these methods. A conference call is when there is more than one called party on a phone call. A party line, often known as a rural phone line, is when two or more network users use the same physical connection.
If the caller’s wireline phone is directly linked to the calling party, the calling party’s phone will ring when the caller hangs up. This is referred to as a “hotline” or “ringdown.” A tone is generally delivered to the calling person to signal that they should begin dialing the desired number. If the calling party cannot dial calls directly, they will be connected to an operator who will place the call for them.
A commercial telephone company’s public network (such as the Public Switched Telephone Network) or a private network is known as a PBX can be used to make calls. A private network is usually linked to the public network to allow PBX users to dial the outside world.
Incoming calls to a private network come to the PBX in one of two ways: directly to a user’s phone via a DDI number or indirectly through a receptionist who will take the call first and then manually connect the caller to the appropriate user on the PBX.
The end-to-end connection for most PSTN calls is established via ISUP signaling messages or one of its variations between telephone exchanges. QSIG, DPNSS, or variations are used to set up calls over PBX networks.
Download Call PNG images transparent gallery.
Resolution: 2000 × 2000
Size: 42 KB
Image Format: .png
Download
Resolution: 1969 × 1969
Size: 111 KB
Image Format: .png
Download
Resolution: 1024 × 1024
Size: 37 KB
Image Format: .png
Download
Resolution: 750 × 750
Size: 22 KB
Image Format: .png
Download
Resolution: 920 × 830
Size: 45 KB
Image Format: .png
Download
Resolution: 920 × 1128
Size: 92 KB
Image Format: .png
Download
Resolution: 1000 × 1000
Size: 36 KB
Image Format: .png
Download
Resolution: 908 × 909
Size: 211 KB
Image Format: .png
Download
Resolution: 643 × 643
Size: 18 KB
Image Format: .png
Download
Resolution: 910 × 910
Size: 171 KB
Image Format: .png
Download
Resolution: 2117 × 692
Size: 233 KB
Image Format: .png
Download
Resolution: 3333 × 4490
Size: 65 KB
Image Format: .png
Download
Resolution: 1024 × 1024
Size: 57 KB
Image Format: .png
Download
Resolution: 800 × 800
Size: 21 KB
Image Format: .png
Download
Resolution: 1000 × 1000
Size: 218 KB
Image Format: .png
Download
Resolution: 784 × 784
Size: 62 KB
Image Format: .png
Download
Resolution: 938 × 981
Size: 18 KB
Image Format: .png
Download
Resolution: 858 × 980
Size: 39 KB
Image Format: .png
Download
Resolution: 854 × 854
Size: 9 KB
Image Format: .png
Download
Resolution: 1424 × 1438
Size: 29 KB
Image Format: .png
Download
Resolution: 1000 × 1006
Size: 10 KB
Image Format: .png
Download
Resolution: 1201 × 1201
Size: 15 KB
Image Format: .png
Download
Resolution: 980 × 982
Size: 60 KB
Image Format: .png
Download
Resolution: 1979 × 1979
Size: 145 KB
Image Format: .png
Download
Resolution: 3008 × 1935
Size: 805 KB
Image Format: .png
Download
Resolution: 1489 × 2400
Size: 129 KB
Image Format: .png
Download
Resolution: 749 × 1211
Size: 22 KB
Image Format: .png
Download
Resolution: 1018 × 1076
Size: 252 KB
Image Format: .png
Download
Resolution: 749 × 749
Size: 48 KB
Image Format: .png
Download
Resolution: 734 × 463
Size: 90 KB
Image Format: .png
Download
Resolution: 2250 × 790
Size: 77 KB
Image Format: .png
Download
Resolution: 938 × 980
Size: 63 KB
Image Format: .png
Download
Resolution: 1535 × 414
Size: 203 KB
Image Format: .png
Download
Resolution: 800 × 800
Size: 28 KB
Image Format: .png
Download
Resolution: 647 × 642
Size: 121 KB
Image Format: .png
Download
Resolution: 980 × 980
Size: 59 KB
Image Format: .png
Download
Resolution: 1280 × 658
Size: 153 KB
Image Format: .png
Download
Resolution: 980 × 980
Size: 36 KB
Image Format: .png
Download
Resolution: 720 × 981
Size: 28 KB
Image Format: .png
Download
Resolution: 866 × 866
Size: 60 KB
Image Format: .png
Download
Resolution: 980 × 974
Size: 68 KB
Image Format: .png
Download
Resolution: 980 × 980
Size: 40 KB
Image Format: .png
Download
Resolution: 1164 × 1181
Size: 63 KB
Image Format: .png
Download
Resolution: 980 × 982
Size: 33 KB
Image Format: .png
Download
Resolution: 980 × 980
Size: 11 KB
Image Format: .png
Download
Resolution: 1019 × 1019
Size: 137 KB
Image Format: .png
Download
Resolution: 1200 × 628
Size: 69 KB
Image Format: .png
Download
Resolution: 980 × 980
Size: 33 KB
Image Format: .png
Download
Resolution: 1800 × 1235
Size: 458 KB
Image Format: .png
Download
Resolution: 1667 × 1667
Size: 46 KB
Image Format: .png
Download
Resolution: 938 × 981
Size: 50 KB
Image Format: .png
Download
Resolution: 1374 × 492
Size: 32 KB
Image Format: .png
Download
Resolution: 1280 × 1280
Size: 115 KB
Image Format: .png
Download
Resolution: 1024 × 1024
Size: 81 KB
Image Format: .png
Download
Resolution: 1024 × 1024
Size: 65 KB
Image Format: .png
Download
Resolution: 1280 × 770
Size: 78 KB
Image Format: .png
Download
Resolution: 980 × 982
Size: 32 KB
Image Format: .png
Download
Resolution: 980 × 980
Size: 43 KB
Image Format: .png
Download
Resolution: 1024 × 1024
Size: 47 KB
Image Format: .png
Download
Resolution: 1297 × 1198
Size: 71 KB
Image Format: .png
Download
Resolution: 1280 × 342
Size: 164 KB
Image Format: .png
Download
Resolution: 669 × 601
Size: 154 KB
Image Format: .png
Download
Resolution: 1200 × 1200
Size: 34 KB
Image Format: .png
Download
Resolution: 682 × 944
Size: 129 KB
Image Format: .png
Download
Resolution: 1235 × 1280
Size: 186 KB
Image Format: .png
Download
Resolution: 720 × 720
Size: 97 KB
Image Format: .png
Download
Resolution: 715 × 715
Size: 82 KB
Image Format: .png
Download
Resolution: 1280 × 1280
Size: 225 KB
Image Format: .png
Download
Resolution: 1166 × 934
Size: 49 KB
Image Format: .png
Download
Resolution: 1698 × 1131
Size: 297 KB
Image Format: .png
Download