Cosmote, Vodafone and Nova numbers

Your number stays with Cosmote, Vodafone or Nova, and customers keep calling it. How it reaches the AI agent depends on what kind of line it is, not on the carrier. Pick the row that describes your number:

Your number is…	Connect it with
A mobile, or a landline that rings on phones directly	Call forwarding to your free Voice Logica number
A business SIP trunk (Cosmote Business, Vodafone Business, Nova Business SIP)	A SIP trunk straight to Voice Logica
A landline on your internet router, no phone system	Forwarding, or your line’s SIP credentials registered by Voice Logica
Connected to an office phone system (Panasonic, Grandstream, Yeastar, 3CX…)	Your phone system, not the carrier

Not sure? If the number rings on desk phones through a phone system in your office, it is the third row. If you never ordered a “SIP trunk” from your carrier, it is not the second.

Call forwarding (any line)

The simplest way, and it works on every Cosmote, Vodafone and Nova line. After you buy a plan, a company in Greece gets one free Voice Logica number. You forward your business number to it and the agent answers.

The codes are the same on all three carriers:

Forward	Mobile	Landline
All calls	**21*NUMBER#	*21*NUMBER#
When you don’t answer	**61*NUMBER#	*61*NUMBER#
When busy	**67*NUMBER#	*67*NUMBER#
Turn off	##21# (or ##002# for all)	#21#

NUMBER is the free Voice Logica number, all 10 digits. On landlines, no answer and busy forwarding work where the line supports them. Dial the code from the phone you are forwarding. The full steps, from ordering the number to testing and transfer credit, are in Forward your number to the agent.

Choose When you don’t answer and When busy if your staff answer first and the agent takes the rest.

Business SIP trunk

If your company has a SIP trunk from its carrier, connect it to Voice Logica directly: no forwarding, and the agent can call out from your own number.

1. Ask your carrier (Cosmote Business, Vodafone Business or Nova Business) for the trunk details: the SIP server address, the numbers (DIDs) on the trunk, a username and password if they use one, and the IP addresses their calls come from. Greek business trunks almost always authenticate by IP.
2. Ask them to allow Voice Logica. They need our addresses on their side. Open a ticket from Support in the app and we send them to you, or to the carrier directly.
3. Telephony → Trunks → + Add Trunk, type VOIP provider. For Provider, pick Cosmote Business or Vodafone, or Custom / manual setup for Nova. The preset fills port, transport and the authentication type. Replace the Host with the server address your carrier gave you.
4. Advanced → Authentication: add the carrier’s IP addresses.
5. Add the numbers, set the destination to your agent and save. Then call your number from another phone and check it shows in Calls.

The general steps and every field are in Your own carrier.

Vodafone transfers

Vodafone Business trunks do not send the original dialled number on a transfer (SIP REFER). If a workflow depends on which of your numbers was called, test it after a transfer.

Your line’s SIP credentials (router line)

A business landline that works through your internet router (VoBB) has SIP credentials: the router uses them to register the number. The carrier can give them to you, and Voice Logica registers the number itself: no forwarding and no phone system. The AI agent answers the number directly and can call out from it.

Before you ask, check two things:

• The router stops ringing. Once Voice Logica registers the number, phones plugged into the router may stop ringing. Do it outside working hours, and keep forwarding as your fallback.
• Have the trunk ready first. Cosmote sends the password by SMS and it is valid for 30 minutes. Create the trunk in Voice Logica before you ask, so you only paste the password.

Cosmote

1. Fill in the form. Download the Cosmote SIP credentials request (PDF), fill it in and sign it. Cosmote can send you the latest version: it is their form, ask ts@ote.gr.

2. Send it to ts@ote.gr (or fax 210 677 9990) with a copy of the line holder’s ID. For a company: page 1 of the ΦΕΚ with the company’s tax number (ΑΦΜ) and legal representative, and the representative’s ID.

3. Prepare the trunk: Telephony → Trunks → + Add Trunk, type VOIP provider, Custom / manual setup:

   Field	Value
   Host / IP Address	ims.otenet.gr
   Username	+30 and your 10-digit number, e.g. +302101234567
   Password	from Cosmote’s SMS
   Advanced → Domain / From Domain	ims.otenet.gr
   Advanced → Port / Transport	5060 / UDP (Cosmote does not offer TCP)

4. When the SMS arrives, paste the password and save within 30 minutes. Add the number to the trunk and set your agent as the destination.

5. Check it registered (the trunk shows online), then call the number from a mobile.

If the trunk stays waiting and its SIP logs show no reply from Cosmote at all, Cosmote accepts the registration only from its own network. Then register through the edge device in your office. Open a ticket from Support with the number and we check it with you.

Vodafone

Vodafone gives one SIP account per number: the username is the number with +30, the domain ims.vodafone.gr, and no separate Authorization ID. Ask Vodafone Business for them.

Vodafone’s server answers only registrations from inside its network, so the number registers through the edge device in your office, not from the cloud. The values that work:

Field	Value
Host / IP Address, or Advanced → Outbound Proxy	62.38.86.150 (backup 62.38.87.118)
Username	+30 and your 10-digit number
Login (Authorization ID)	empty
Advanced → Domain / From Domain	ims.vodafone.gr
Advanced → Port / Transport	5060 / UDP
Registration expiry (seconds)	3600 (Vodafone rejects 300)
Advanced → Allowed RTP source IPs	62.38.86.151

ims.vodafone.gr is only a domain name: it does not resolve outside Vodafone’s network, so the host must be the IP address.

Nova

Ask Nova Business for your line’s SIP credentials (server, username, password) and open a ticket from Support with them. We have no tested settings for Nova yet and set it up with you.

Through your office phone system

If your Cosmote, Vodafone or Nova line already goes into a phone system, leave the line as it is and connect the phone system to Voice Logica. The phone system decides which calls go to the agent, and staff keep their extensions. See Connect your PBX. A phone system inside your office network with no public address needs the edge device.

From Claude or ChatGPT

With Voice Logica connected to Claude or ChatGPT, ask “Connect my Cosmote number”. It asks which kind of line you have and does the steps: get_free_number for forwarding, create_sip_trunk for a business trunk or your line’s SIP credentials, connect_pbx for a phone system. For your line’s credentials it creates the trunk first, turned off and without a password (create_sip_trunk), then adds the password from the SMS and turns it on (update_sip_trunk).

Troubleshooting

The forwarding code is rejected

Call forwarding (εκτροπή κλήσεων) is not enabled on the line. Ask the carrier to enable it, or turn it on in the My Cosmote or My Vodafone app.

The trunk is offline or calls do not arrive

If calls to your number never arrive, the carrier has not yet allowed Voice Logica’s addresses, or the carrier IPs under Advanced → Authentication are wrong. Check the trunk’s SIP logs.

Do I have to move my number to Voice Logica?

No. With every option above the number stays with your carrier and you keep paying them for it.

Next Steps

Forward your number to the agent: the forwarding steps in full.→Your own carrier: every SIP trunk field.→Connect your PBX: steps per phone system.→Transfer: hand callers to a person.→