Scale your call capacity in minutes, not months.
Add or remove SIP channels instantly to match your actual call volumes. No minimum commitments, no wasted capacity, and no engaged tones during your busiest periods. UK-wide flexible SIP trunking by IP Four.
Minutes
to add or remove SIP channels. No engineer visits, no waiting for carriers
400%
peak capacity increase achievable with burst SIP channels during high-demand periods
0
minimum channel commitment. Start with exactly what you need and scale from there
UK-wide
flexible SIP channel management across all UK regions
Channel capacity that moves with your business.
Instant Channel Scaling
Add or remove SIP channels in minutes through your management portal or by calling our support team. No engineer visits, no hardware changes, no waiting for a carrier to provision new lines.
Burst Capacity
Temporary burst channels available for campaigns, seasonal peaks, or unexpected call volume spikes. Pay only for the additional capacity you use, for as long as you need it.
Channel Usage Reporting
Real-time and historical reporting on channel utilisation. See exactly how many channels you are using at any time of day. Right-size your capacity based on actual data, not guesswork.
No Minimum Channel Commitment
Start with as few channels as you need. No minimum order quantities, no forced over-provisioning. Grow your channel count as your business grows without renegotiating your contract.
Concurrent Call Management
Configure maximum concurrent call limits per trunk group or DDI range. Prevent unexpected overage charges while ensuring your most important lines always have capacity available.
Multi-Site Channel Pooling
Pool SIP channels across multiple sites so capacity is shared intelligently. A quiet site can absorb calls from a busy one. Total channel efficiency improved without adding more lines.
Right-sized capacity from day one.
Call Volume Analysis
We analyse your current call volumes, peak periods, and concurrent call patterns. Identify the right starting channel count and where burst capacity would add the most value.
Channel Architecture Design
Design your channel structure across sites, DDI ranges, and trunk groups. Ensure capacity is allocated where it is needed most and pooling is configured correctly.
Portal and Reporting Setup
Management portal configured with your channel groups and reporting dashboards. Alerts set up to notify you when utilisation approaches your configured limits.
Burst Capacity Configuration
Burst channel rules configured for your peak periods. Automatic scaling triggers set up if required. Spend limits applied to prevent unexpected charges.
Go-Live and Monitoring
Channels go live with full monitoring active. IP Four engineers review utilisation for the first two weeks to confirm the channel count is correctly sized for your actual traffic.
Ongoing Optimisation
Quarterly channel reviews included as standard. We proactively recommend adjustments based on your usage trends. No need to monitor this yourself.
Flexible capacity delivering results across the UK.
Challenge: A Manchester e-commerce business experienced call volumes 400% higher during peak trading periods but was paying for that capacity year-round with ISDN lines.
Outcome: SIP trunking with burst capacity deployed. Base channel count set for normal trading. Burst channels activated automatically during peak periods. Annual saving of 14,000 pounds versus fixed ISDN capacity.
Challenge: A Leeds recruitment agency ran regular candidate outreach campaigns that generated high inbound call volumes for short periods. Their fixed ISDN capacity caused engaged tones during campaigns.
Outcome: Flexible SIP channels with campaign burst capacity. Zero engaged tones during campaigns. Channel count returned to base level automatically after each campaign. No wasted spend between campaigns.
Challenge: A London financial services firm needed to scale call capacity rapidly when onboarding new clients but their ISDN contract required 30 days notice for additional lines.
Outcome: SIP trunking with same-day channel scaling. New client onboarding no longer constrained by telecoms capacity. Channel count adjusted 14 times in the first year with zero delays.
Stop paying for capacity you do not need.
We will analyse your call volumes and design a flexible SIP channel structure that matches your actual usage. Pay for what you use, scale when you need to, and never pay for idle capacity again. Free assessment, no obligation.