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 ...

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10 views

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 ...
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1answer
25 views

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 ...
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2answers
79 views

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 ...
0
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2answers
63 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 ...
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1answer
33 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. ...
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1answer
11 views

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 ...
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0answers
16 views

How do I clear a voicemail box on Modular messaging for other users (Avaya)

I have Avaya ASA and Modular Messaging. Occasionally, someone asks us to clear their voicemail box. The only way I know how to do this currently is to attach a voicemail box to outlook so I can clear ...
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1answer
431 views

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 ...
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0answers
22 views

Nortel BCM 400 Static on local side of digital sets

We have a Nortel BCM400 v4.02.03. For the past couple weeks or so we have been having issues with static when taking or placing calls on digital sets. This is happening multiple times a day. I have ...
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0answers
66 views

Snom sip phone strange behavior

Didn't know where to ask this question, if someone can point me out the correct place, i'll be grateful I will be grateful, if someone will be able to help me with the following, I have around 200 ...
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1answer
1k views

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 ...
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0answers
32 views

Can I Use Different Versions of CME and CUE

I am running CME 8.6 on a Cisco 2811. I would like to install NM-CUE and run CUE 7 with this. It this possible, even with a version mismatch?
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0answers
111 views

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 ...
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1answer
87 views

Normal phone number over ethernet, what is this service called? [closed]

Plug in phone to wall with ethernet cable Someone calls a toll free number Your phone rings What is the correct, vendor-neutral term for this service? Some terms out there are: Comcast calls ...
1
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1answer
75 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 ...
1
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1answer
392 views

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 ...
0
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1answer
159 views

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 ...
16
votes
5answers
353 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 ...
2
votes
1answer
455 views

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 ...
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1answer
91 views

Which handsets work with IP DECT base?

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 ...
1
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1answer
1k 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 ...
-3
votes
1answer
80 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 ...
0
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2answers
136 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. ...
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1answer
276 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 ...
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votes
1answer
217 views

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 ...
2
votes
3answers
505 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. ...
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1answer
161 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 ...
0
votes
1answer
153 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 ...
1
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1answer
67 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: ...
0
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2answers
277 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?
0
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1answer
973 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" ...
1
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2answers
328 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 ...
1
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1answer
272 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 ...
0
votes
1answer
96 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 ...
0
votes
1answer
111 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, ...
0
votes
1answer
502 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 ...
1
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2answers
118 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 ...
2
votes
2answers
123 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 ...
0
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2answers
822 views

What is a fairly accepted endpoints to concurrent calls ratio for a PBX?

Hey guys! Not too positive about the relevance of this question to Server Fault, but I'll let you guys poke around at it anyway. :) I'm trying to figure out what an accepted ratio of endpoints to ...
1
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4answers
194 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 ...
2
votes
5answers
288 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 ...
2
votes
3answers
321 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 ...
0
votes
2answers
169 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
7
votes
3answers
636 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
1answer
144 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 ...
2
votes
1answer
137 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 ...
1
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3answers
70 views

Does anyone provide a Skype connection service?

Is there a way of offering Skype access to incoming calls while keeping all telephony traffic over our chosen business telephony provision? Is there a 3rd party who can route incoming Skype calls to ...
0
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1answer
292 views

Is it a bad idea to run voice and data over the same bonded T1?

Currently we have a T1 which we use for both our voice and data. We are looking at getting a bonded T1 but have been told by the provider that it would be a bad idea to run both voice and data on a ...
1
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2answers
116 views

Recommended FXO Gateway for UK analogue lines

Can anybody recommend any FXO gateway devices to connect analogue telephone lines to an Asterisk VoIP system. Requirements: Minimum of 4 ports. Enterprise grade - quality is more important than ...
3
votes
1answer
140 views

Does anyone know a good Website comparing all the PBX/IP telephone solutions?

I'm looking for a good website dressing a comparative analysis of the most popular telephony solutions resellers (Cisco, Avaya, Siemens, Microsoft, etc...). I already found a very nice work comparing ...