Company
The direct marketing agency BNZSA is headquartered in Spain but its sights are set on international expansion. A major part of its business is telemarketing, therefore having a reliable telecommunications provider is key. The company also has offices in France, the United Kingdom, and Morocco. However, all calls originate from Spain, which meant BNZSA needed a VoIP service to cut costs and reach multiple countries using local numbers.
To support this, Colt provided a multi‑country SIP Trunking service and a dedicated 3GB connection to handle all traffic. Alex Biet, Director of IT at BNZSA, explains the need for a high‑quality call service capable of operating across different countries using local numbers. Unified communications have become a key enabler of the company’s European expansion.
“The main challenge was to find a system that would give us sufficient quality, continuous service, and no interruptions to calls. At first, we were using another provider, and it was difficult for us to reach these standards. Colt has played a very important role here as since we started working with them, we haven’t had any problems.” - Alex Biet, IT Director at BNZSA
BNZSA's growth supported by Colt services
BNZSA’s business centres on connecting its clients with potential buyers by generating leads and providing accurate contact information. This enables clients to save time and better target their sales efforts.
Founded in 2013 with just seven employees, BNZSA has experienced rapid growth. Today, it has around 200 employees, with its main contact centre located near Madrid and additional offices in the UK, France, and Morocco. The company has worked with Colt since 2017 through consultancy partner Acacia TI.
As the person responsible for all infrastructure uptime, from servers to telecoms, Biet highlights the importance of technology for the business:
“Our business uses Colt products almost entirely. Making calls is an essential part of our everyday business. Colt provides us with SIP Trunk (VoIP) services, and we have a dedicated connection with Colt, over which we run another SIP Trunk via VPN.”
BNZSA operates exclusively in the B2B market, serving clients in the IT industry — from leading global brands to smaller companies. The company employs 80 agents in Spain, 50 in Morocco, and additional staff across Europe. Campaigns are carried out in fourteen languages by native‑speaking agents. Despite this broad footprint, all calls — regardless of the agent’s location — are routed from Spain, making multi‑country SIP Trunking essential.
“Because we have offices in England and France, we can give agents numbers from these countries. Clients respond better when the call appears to come from a local number,” Biet explains.
He emphasises that the calling system must guarantee quality no interruptions, clear voice, correct volume, and rates Colt highly for service reliability. The VoIP solution also reduces voice service costs. For BNZSA, any outage, even of 30 minutes, could cause substantial business losses.
Another key requirement is unified communication across all countries. As a rapidly expanding European business, having a single telecommunications provider like Colt simplifies IT management and reduces the risk of downtime.
Adapting to Remote Work
Growth can be planned, but BNZSA also successfully adapted to unexpected challenges, such as the COVID‑19 lockdown.
“When we found out we were going into lockdown, we decided on the Friday to send everyone home, and by Monday we already had over one hundred small‑scale home offices,” Biet recalls.
During this transition, network usage increased significantly.
“Colt told us we were using more than 90% of our Internet capacity. We increased the bandwidth without any problems. We now have a dedicated 3GB line, which is more than enough for our needs.”
At the start of the pandemic, Colt proactively monitored client bandwidth and alerted those nearing saturation, offering fast upgrades. Months after the initial lockdown, most BNZSA employees continued to work from home. Biet remains satisfied with the service:
“Just as we demand quality from ourselves, we demand it from our providers — and Colt delivers. They’ve simplified IT management for me. If I need more capacity, they’re there. If my router crashes, they call me to check what happened.”
The strong working relationship is supported through Colt partner Acacia TI, which provides dedicated consultancy and quick response times.
“Acacia TI helps us a lot because we’re always evolving — changing projects, changing needs. I don’t think a month goes by without me contacting them.”
Looking Ahead
BNZSA manages around 150 hours of calls per day — approximately 3,500 hours per month — all routed through its servers in Madrid. The company currently plans to keep operations on‑premises rather than migrate to the cloud, but its global ambitions remain.
Before the pandemic, BNZSA had planned to open an office in Asia to expand into new markets. While this is temporarily on hold, the goal remains. One challenge will be unifying communication between European and Asian offices.
“The challenge will be achieving unified communication. Colt can play a key role because it has a global network and can support our future plans,” Biet concludes.
Like many companies, BNZSA will resume expansion once circumstances allow — and Colt will be a key partner on that journey.
