Questions tagged [telephony]

Telephony is the science of translating sound into electrical signals, transmitting them, and then converting them back to sound; that is, the science of telephones. The term is used frequently to refer to computer hardware and software that performs functions traditionally performed by telephone equipment. For example, telephony software can combine with your modem to turn your computer into a sophisticated answering service.

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VoIP: No ringback on specific provider combination

please help me out with this one: PROBLEM DESCRIPTION No ringback when calling cellphones using VoWIFI/VoLTE Only happens when calling from a specific VoIP telephony provider to a specific cellphone ...
Giorgos Amoiridis's user avatar
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32 views

How can Asterisk voicemail handle call holding?

Given an Asterisk PBX system version 20 or above. Given that a user calls another user, the call is missed and is sent to voicemail. While the caller is directed to voicemail, the caller receives ...
Charles Langlois's user avatar
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Testing quality of sustained call quality to a Public number

While migrating from an old Avaya to Skype for Business (on-prem), I have been asked a few questions about call duration and call quality during maintenance. Questions stem from unclear answers from ...
RunThor's user avatar
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FreePBX - How to re-write forwarded "follow-me" caller ID?

Sam calls Julie's direct dial line and because she's not at her desk (and because of a follow me rule) the call is forwarded to her mobile. FreePBX forwards the call through the correct outbound ...
Touff's user avatar
  • 183
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1 answer
235 views

Shoretel Connect: Create SIP Trunk Backup for Analog Trunk on SG90

I've worked with some VoIP Products before, mostly Asterisk (base version, build from source) management for a small ISP doing in-network VoIP solutions for customers. My current position hasn't ...
Sam K's user avatar
  • 506
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2 answers
4k views

How to reset a Cisco ATA 186 to factory defaults?

I have an old Cisco ATA 186, configured by an extincted Phone Service Company, it is password protected and on TFTP client mode. I tried to reset it with IVR FACTRESET code (322873738#) but it ask ...
Alejandro-2988924's user avatar
-1 votes
1 answer
44 views

PSTN and Internet [closed]

Where Is Physical Wires Exist for Internet Is It Using PSTN Wires for Transferring Data? If both are different network then How Telecom Companies Are Providing Internet Facility?
bhasker pratap singh's user avatar
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2 answers
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ISDN BRI vs SIP Trunks over EDIA

I am installing Asterisk in a small office with just 4 lines and 8 Extensions. I have two choices from my local telco (Fairpoint): 1) Old School ISDN BRI lines which I would connect to Asterisk ...
iewebguy's user avatar
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2 answers
695 views

Asterisk dialplan several apps simultaneously

I am designing an Asterisk 11 Dialplan for a call center. I am facing a problem in dialplan. In order to achieve the desired configuration , i think it is necessary to run 2 applications at the same ...
Sir.pOpE's user avatar
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Asterisk dialog destruction on attended transfer timeout

Steps to replicate: Alice receives incoming call from Eve (either from external line or another extension, doesn't matter). Alice makes attended transfer to Bob and hangs up before Bob answers. Bob ...
Alexander's user avatar
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how do I route Asterisk dials from serverA to serverB?

I'm trying to make an Asterisk server connect to a SIP provider (which offers PSTN origination and termination). I've been reading the great Definitive Guide, but am having a conceptual problem with ...
Thufir's user avatar
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Asterisk call should be with peer, but gets trapped and stays local

I'm working with Asterisk and Vicidial, trying to place outbound calls through a SIP "trunking" provider. The calls never connect, instead I hear either demo-instruct.gsm or invalid.gsm playing from ...
Thufir's user avatar
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2 votes
2 answers
3k views

Asterisk WaitForSilence NEVER detects silence

I am trying to use my dialplan to play recordings with WaitForSilence to make sure it wait until the person is done speaking or the message is left on voicemail. However, it doesn't seem to wait for 5 ...
Mikey A. Leonetti's user avatar
1 vote
1 answer
63 views

Unable to port phone numbers

I have some limited experience in telco, and have done number porting in a business environment before. I have a fairly large number of DIDs with a local telco provider that we use for inbound faxes. ...
jeremy's user avatar
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Does SIP offer a mechanism to initiate a stream and returning an error?

Imagine you are browsing to a HTTP URL that does not exists. You'll get a 404 which often contains an explanatory body. Now imagine you are calling someone using VoIP with SIP and use a non-existent ...
bot47's user avatar
  • 327
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Call duration limit & least cost routing

We have Elastix version 2.4 setup and we have some little questions which if you could please answer to solve via web based panel of Elastix, as agents are making calls via Elastix there are little ...
Fari's user avatar
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route incoming asterisk sip calls - fake auth rejected

we are trying to handle incoming sip_calls on our asterisk server, but somehow we always end up getting either 403 or 603 (which should be the same?) what should happen if it works: user calls ...
longbow's user avatar
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Cisco VoIP telephony - Can't save Night Service Bell Configuration

When trying to save "Night Service Bell Configuration" settings under Cisco Unified Communications Manager Express the following error message pops up. Configuration change failed. Please report the ...
Ash's user avatar
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-5 votes
1 answer
130 views

What is the vendor-neutral term for internet telephone service? [closed]

Plug in phone to wall with ethernet cable Someone calls a phone number Your phone rings What is the correct, vendor-neutral term for this service? Unfortunately different vendors call this same ...
William Entriken's user avatar
1 vote
1 answer
186 views

Which one VoIP SIP audio codec should I choose to high quality calls?

The quality of VoIP calls depends on the codec used for the transmission and on the bandwidth of Internet connection. I want to use best optimized codec for my Internet connection. I have to select ...
BlueMark's user avatar
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What is the best option for SIP service redundancy?

From your practical experience, what is the best option for SIP service redundancy? a) one SRV record pointing to a hostname which has two A records b) two SRV records pointing to two different ...
Stanislav Sinyagin's user avatar
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Bad CentOS server performance with Digium T1/E1 TDM Card

I have a PowerEdge 2850 server that used to work well under CentOS 5 i386. It was used with Asterisk as a telephony server, hooked up to the world via a T1 line. I've since wiped it and installed ...
Kuba hasn't forgotten Monica's user avatar
16 votes
6 answers
504 views

What alternatives do I have for telephony if my LEC says the Central Office has an issue?

In our New York office we've been waiting for almost a month for Verizon Business to repair a problem at our local CO. They keep saying that the damage from Hurricane Sandy was so extensive that they ...
Peter Grace's user avatar
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Why does asterisk (and other systems) feel the need to regenerate in-call DTMF?

I am using Asterisk to interact with analog telephony devices that can be programmed and tested with DTMF interaction. Some of these guys speak rather quickly. Too quickly, you could convincingly ...
Mattie's user avatar
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2 answers
490 views

Which handsets work with IP DECT base? [closed]

My workplace uses an Ascom IP DECT base station (IPBS1), and Ascom handsets as well. We're looking to replace some broken handsets. The ones by Ascom, however, are rather expensive, and we're not ...
waldrumpus's user avatar
2 votes
2 answers
2k views

Accept calls on external cell phones - FreePBX Distro

We installed FreePBX distro last week and configured it so that when someone calls in, it goes to all the phones so someone here can answer the call. After trying all the internal extensions, it ...
Matt's user avatar
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-3 votes
1 answer
102 views

Design network with redundancy [closed]

I need to build a redundant solution for my company. The idea is to have internet provided by two different ISP in order that if one link goes down the other link will take over. This should be done ...
MixturaDementiae's user avatar
0 votes
2 answers
162 views

Can a "4 line" Grandstream GXP 2000 handle 8 lines?

We have a whole bunch of GXP 2000 phones here but now we're growing too big for just 4 incoming lines. We use Trixbox (asterisk) for the phone system with 4 analog lines coming into a Dell server. ...
Matt's user avatar
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1 vote
1 answer
637 views

Local Call Classification in CDR records from Cisco CallManager

I am trying to analyze our telephone usage to evaluate our phone plan with our PRI provider. I have enabled CDR records within Call Manager and am able to generate "Gateway Summary" reports which ...
minamhere's user avatar
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-2 votes
1 answer
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Why are phone companies doing away with unlimited data? [closed]

I've noticed that both Verizon, and AT&T, being the 2 largest phone companies in the US have done away with unlimited data, while smaller companies, such as sprint and Tmobile have not. This made ...
Ephraim's user avatar
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2 votes
3 answers
1k views

How to add more incoming/outgoing lines capability to Asterisk?

We have 4 people call us from around the country at once and it causes our phones to be busy. We want to be able to have at least 8 people call us at once without anyone getting the busy signal. ...
Matt's user avatar
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1 vote
1 answer
190 views

How to add a user who is out of state as if they were just another extension AT our office? [closed]

We want to add a person who is in another state to our phone system as though they were simply in another cubicle here at the office. So, they can dial "302" and get the office assistant's extension ...
Matt's user avatar
  • 311
0 votes
1 answer
179 views

Lync 2010 Standard Server Collocation

I'm planning out a new Lync 2010 deployment (mixed with Office 365 E4, completely replacing a legacy PBX system), and am getting a bit confused with some of the docs that MS provides. The company I'm ...
jwegner's user avatar
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1 vote
1 answer
122 views

Is there a way to get an "extension board" for a Polycom IP6000 phone? [closed]

I don't see any for sale, but is there a way to get one hooked up to it? Basically, I need 15+ speed dials. Something like this would be great, but for the Polycom instead of Grandstream: http://www....
Matt's user avatar
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2 votes
2 answers
2k views

How do you set up speed dial on Polycom IP6000 phones?

Basically I would like speed dial on this so I can press 1 and it will dial 101 AND I can press 2 and it will dial 555-555-5555. Is there a way to do this?
Matt's user avatar
  • 311
0 votes
1 answer
3k views

How to pass/process extension numbers while calling Freeswitch from outside SIP gateway?

Suppose I have Freeswitch, which has SIP gateway configured. So, the local users of this Freeswitch can call outside via <extension name="russia"> <condition field="destination_number" ...
user avatar
1 vote
2 answers
1k views

Separate VoIP telephony and computer network - or not?

We have a PBX server (also connected to the internet) and all VoIP devices currently (early stages of deployment) set up on a network that is phsyically separate from the main computer network. As ...
Carko's user avatar
  • 264
1 vote
1 answer
605 views

Microsoft Lync and Avaya PBX system

I am a complete beginner concercing Microsoft Lync and PBX systems, so please bear with me. I have set up a Lync standard server which is running fine. We can chat/audio & video conference on our ...
Yash's user avatar
  • 143
0 votes
1 answer
635 views

How do I change outside access number from 8 to 9 in Cisco UCM?

I want to change my outside access number from 8 to 9 in Cisco Unified Communications Manager. I've copied all of my 9.x route patterns to create a duplicate set of 8.x route patterns. When I try to ...
Rob D.'s user avatar
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1 answer
153 views

How to segregate network devices between several T1s and a Cable connection?

So, I'm working on setting up a call center. Our outbound calls will be going to an off-site dialer so they'll be going over the internet as data (VoIP?). Then we have our customer service department, ...
Gup3rSuR4c's user avatar
0 votes
1 answer
812 views

Avaya 9630 for SIP

Is there any way to make the 9630 Desktop Headset work just as a SIP IP telephone, without the extensive need for additional Avaya equipment. All of our infrastructure is Cisco and we may receive ...
xciter's user avatar
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1 vote
2 answers
150 views

Software/Hardware used to build Virtual PBX Like Systems

I work for a large web site design and hosting firm. We are planning to introduce a suite of SEO services. I have been given an interesting task as part of the development effort. The goal is to ...
SvrGuy's user avatar
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2 votes
2 answers
193 views

Asterisk Environment

I'm interested in building a small Asterisk environment to explore Asterisk. I understand that these are multiple questions, but considering how closely related these are to each other, I decided to ...
jrg's user avatar
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1 vote
4 answers
352 views

Installing new switch, what is this box?

my friend has asked me to come and install a new switch he bought. The top two panels are just the panels that connect to the cabling throughout the floor. The third panel is the switch which I'm ...
GBC's user avatar
  • 465
2 votes
5 answers
350 views

Considerations for a business looking to transition from PSTN to IP Telephony

Full disclosure - This is related to a homework assignment question. I am not asking you to do my work for me, I am merely looking for some pointers and considerations to direct me in my further ...
Bryce Thomas's user avatar
2 votes
3 answers
337 views

Which smartphone OS would you choose for your users?

While we currently only use windows mobile smartphone, my boss seems less and less reluctant to try and choose a new kind of OS for our users corporate phones. For some reasons, we can't use a ...
Florent Courtay's user avatar
0 votes
2 answers
274 views

NGN detection with Asterisk PBX

Is it possible to detect if a NGN (Non Geographic Number, e.g. 0844, 0845, 0870 etc) number has been used to connect to an Asterisk PBX? Thanks in advance. Kyle
Kyle Hudson's user avatar
9 votes
3 answers
2k views

What are some potential uses of Asterisk (PBX) for a "power user"

So I read a lot of good things about Asterisk. I am not however looking to run a call center or small business setup. I am still interested what potential uses it has for me as a "power user" and ...
2 votes
1 answer
174 views

Moving from Analogue PBX to digital VoIP?

I don't even know if this belongs here?. If not, do let me know. So we have an analogue Alkatel PABX system in our little office. We have extensions, direct lines and PBX lines. We are trying to ...
0xdeadbeef's user avatar
2 votes
1 answer
147 views

telephony + exchange 2010 (unified messaging)

ok i am a complete n00b when it comes to telephony ... i was wondering we are beginning to play with exchange 2010 in the office ... How can i connect a telephone line into the server? so we can ring ...
Rhys Evans's user avatar