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OPERATIONS & COMMUNICATIONS · 15

IP telephony

An IP PBX that knows who is calling, where to route the call and what was said. The first line is held by a classic voice menu — or by a voice agent that understands the request from the first sentence.

Discuss a project
First line
Type of enquiry
+381 60 ··· 214Belgrade live
CRM
customer since 2024 7 requests last order 14 days ago

The caller hears “I'd like to move my appointment to Thursday”

The caller hears “Where is my order? I placed it yesterday”

The caller hears “I received the wrong item and need a refund”

Appointment moved, confirmation sent by SMS

Delivery status read out, tracking number sent to the caller

Handed to the responsible manager with the context ready

  1. Call accepted on the SIP trunkThe caller hears: Ringing
  2. Number recognised, customer record openedThe caller hears: “Hello, how can I help?”
  3. Speech recognised, intent detectedThe caller hears: The caller speaks in their own words
  4. History and current records loaded from the CRMThe caller hears: “I can see your Tuesday appointment”
  5. The agent acts or picks a routeThe caller hears: The agreement is confirmed
  6. Outcome, recording and transcript saved to the CRMThe caller hears: “I've sent you an SMS confirmation”
  1. Call accepted on the SIP trunkThe caller hears: Ringing
  2. The greeting is playedThe caller hears: “Hello, you have reached…”
  3. Waiting for a keypad choiceThe caller hears: “Press 1 for sales, 2 for support”
  4. Moving to the second menu levelThe caller hears: “Press 1 to book, 2 to reschedule”
  5. Placed in the operator queueThe caller hears: Hold music
  6. An operator answers without any contextThe caller hears: “Your name and how can I help?”

The timings illustrate the structure of the scenario, not measurements from a specific project.

LIVE DEMO

What happens inside the system while a call is running

+381 60 ··· 214Belgrade live
CRM
customer since 2024 7 requests

The caller hears “I'd like to move my appointment to Thursday”

Appointment moved, confirmation sent by SMS

0:01 · Call accepted on the SIP trunkThe caller hears: Ringing

0:02 · Number recognised, customer record openedThe caller hears: “Hello, how can I help?”

0:07 · Speech recognised, intent detectedThe caller hears: The caller speaks in their own words

0:09 · History and current records loaded from the CRMThe caller hears: “I can see your Tuesday appointment”

0:18 · The agent acts or picks a routeThe caller hears: The agreement is confirmed

0:24 · Outcome, recording and transcript saved to the CRMThe caller hears: “I've sent you an SMS confirmation”

OPERATIONS & COMMUNICATIONS · 15

Classic menu / Voice agent

caller's time before the conversation gets to the point

Classic menu 1:14
  1. 0:01 RingingCall accepted on the SIP trunk
  2. 0:12 “Hello, you have reached…”The greeting is played
  3. 0:26 “Press 1 for sales, 2 for support”Waiting for a keypad choice
  4. 0:41 “Press 1 to book, 2 to reschedule”Moving to the second menu level
  5. 0:58 Hold musicPlaced in the operator queue
  6. 1:14 “Your name and how can I help?”An operator answers without any context
The caller listens to the options and picks the one closest to their question. Every menu level is seconds of billed connection.
Voice agent 0:24
  1. 0:01 RingingCall accepted on the SIP trunk
  2. 0:02 “Hello, how can I help?”Number recognised, customer record opened
  3. 0:07 The caller speaks in their own wordsSpeech recognised, intent detected
  4. 0:09 “I can see your Tuesday appointment”History and current records loaded from the CRM
  5. 0:18 The agreement is confirmedThe agent acts or picks a route
  6. 0:24 “I've sent you an SMS confirmation”Outcome, recording and transcript saved to the CRM
The agent sees the caller's record before the first sentence: past requests, orders, delivery status. The caller does not have to explain what the system already knows.
WHY IT MATTERS

When telephony is just the staff's mobile phones

What happens today

  • A call outside business hours simply did not happen — and nobody in the company knows about it
  • The conversation happened, but only the manager remembers what was promised
  • A manager leaves — and takes with them the number customers were used to calling
  • How many calls came in yesterday and how many went unanswered — a question with no answer
  • Advertising brings calls, but which campaign brought them is unknown

What changes with IP telephony

  • Every call is logged: time, number, direction, duration, outcome
  • The conversation is recorded and attached to the customer record in the CRM
  • The numbers belong to the company, not to individual employees
  • Load by hour and day is visible in a report — shifts are planned from data
  • A dedicated number per campaign shows where the call came from
SCOPE OF WORK

What a telephony project includes

Audit of lines and numbering

We map where calls arrive today, which numbers are in use and at which step requests are lost.

SIP provider connection

We select an operator for the task and volume, connect the trunks and configure a backup channel.

Porting existing numbers

Numbers move to the new PBX; customers keep calling the contacts they already know.

Internal numbering

Short numbers for staff and departments, free calls inside the company and between locations.

Routing scenarios

Rules by time of day, weekday, caller language, department and current line load.

Recording and storage

Recording of selected lines, retention period, caller notification and role-based access.

CRM integration

A call card, one-click dialling from the customer record, request history and a link to the recording.

Call tracking

Dedicated numbers per campaign and channel, so you can see which advertising brings calls.

Team training

We walk the team through the interface, call transfers, queues and access to recordings.

Support and monitoring

We monitor line availability and call quality, and respond to incidents per the agreed rules.

THE CALL'S PATH

What happens between the ring and the CRM entry

  1. Call

    The provider passes the inbound call to the company's SIP trunk

  2. Identification

    The PBX recognises the number and pulls the customer record

  3. First line

    A voice menu or the agent — depending on the chosen scenario

  4. Routing

    The call goes to the right department, accounting for hours and load

  5. Conversation

    The employee sees the customer and their history before saying hello

  6. Outcome

    Duration, recording and outcome are saved to the customer record

THE ARITHMETIC

What a voice menu costs

While the caller listens to the options and picks an item, the connection is already open and billed. Enter your own figures and see what navigating the menu alone costs.

analytics.vmtech.rs
minutes a month go into navigating the menu
that is what it costs at your rate
hours of customer time per month
a year at the same volume
Spread across the days of the month

The calculation uses only the values you entered and shows the cost of menu navigation itself. It is not a promise of savings — the actual result depends on the scenario and the mix of requests.

COMPARISON

Three ways to take calls

Staff mobiles Classic PBX VMTech IP telephony
Call recording No Sometimes, stored locally Yes, with role-based access
History in the CRM No Via custom work Call card created automatically
Working outside the office Yes No Yes, from any device
Adding an employee A new SIM card A handset and a free port An extension in minutes
Load analytics None Limited Reports by hour, department and source
The number when someone leaves Leaves with them Stays Stays with the company
Scaling Every new number is a new bill Requires hardware By configuration, without new hardware
CONTROL

What the reports show once you are live

Telephony stops being a black box. “How many calls are we losing” and “when are we short-staffed” get answered from data rather than impressions.

reports.vmtech.rs
Live calls
6
In queue
2
Closed automatically
68%
Average answer time
0:09
Load by hour
Enquiry types
Booking and rescheduling 42%
Order status 27%
Consultation 18%
Complaint 13%
Transcript of the last call

CallerI'd like to move my appointment to Thursday

AgentI see Tuesday at 10:30. Does Thursday at 11:00 work?

CallerYes, that works

Outcome: appointment moved · SMS confirmation · record updated

The figures shown illustrate the reporting interface; they are not a specific client's results.

TECHNOLOGY LANDSCAPE

What it runs on

SIP / RTPProtocols for call setup and voice transport
WebRTCCalls straight from the browser, nothing to install
Opus / G.711Codecs: voice quality matched to the available channel
IP PBXThe core for routing, queues, schedules and recording
APIs and webhooksThe link to the CRM, calendar and internal systems
MonitoringLine availability and call-quality checks

The phone numbers belong to your company and stay on your contract with the operator. VMTech is responsible for architecture, configuration, integrations and support.

ARCHITECTURE

How the telephony is put together

Pick a mode and the diagram shows the path a call takes, what data moves and where the operator's responsibility ends.

01 Operator and numbers
LandlineMobile numbersNumber porting
02 SIP trunk
RegistrationChannelsBackup provider
03 IP PBX
RoutingQueuesScheduleRecording
04 First line
Voice agentClassic IVRVoicemail
05 Data
CRMCalendarOrders database
06 Workstations
SoftphoneMobile appBrowser
07 Analytics
ReportsTranscriptsCall tracking

The call arrives from the operator's number at the PBX and is distributed to a free employee.

Numbers and lines stay on the client's contract with the operator. VMTech owns the architecture, configuration, integrations and support.

INDUSTRIES

One architecture, different businesses

Pick an industry: the caller card, the data, the route and the outcome all change.

desk.vmtech.rs
Clinic
Returning patient
+381 ···
Doctor: Nikolić
Visit: Tue, 10:30
Policy active
Doctor's scheduleCall route

Appointment moved, reminder goes out a day before

QUESTIONS

What people usually ask before we start

Can we keep our existing number?

Yes. Porting is done together with the operator: the number is kept and customers keep calling the contact they know. During the transfer we set up parallel call handling so no call is lost.

Do we need to buy desk phones?

No. Staff work through a desktop app, a mobile app or directly in the browser. IP handsets are added where they are more practical — at a reception desk or on a shop floor.

How do calls get into the CRM?

The PBX sends the CRM a call event: number, direction, duration, owner and a link to the recording. If the customer already exists, the call is attached to their record; if not, a new contact is created under rules you define.

What about call recording and data protection?

Recording is enabled at your decision and only for the lines you choose. Retention period, caller notification and role-based access are configured so that only staff who need the recordings can play them.

How is this different from a regular PBX?

A classic PBX switches lines inside a building. IP telephony runs over the internet connection, so a workstation is not tied to the office and the PBX itself becomes part of the company's digital landscape, exchanging data with the CRM, the schedule and analytics.

What can a voice agent do that a voice menu cannot?

A menu offers options and waits for a choice. The agent listens to a question phrased in ordinary words and understands what it is about. Connected to the customer database, it already sees who is calling and what they asked before. Complex or disputed cases still go to a human operator.

What happens if the internet goes down?

A fallback scenario is configured: if the primary channel drops, calls automatically go to staff mobiles or to a second provider. The caller does not notice.

What do you need from us to start?

A list of staff and departments, the call-distribution logic you want, access to your current operator for porting, and a decision on call recording. The rest is our part.