Network and Trust: Four Regions, SLA, DPA

Primary PoP: Frankfurt

EU-central placement for low-latency reach across Germany, Benelux, France, Switzerland, Austria, Poland, the Nordics, the UK, and the Mediterranean. Active-active SBC pair behind a single FQDN.

Edge: London

UK edge for sub-15ms reach to BT, Vodafone, Virgin Media. Failover for Frankfurt-primary customers; primary for UK-domestic customers.

Carrier interconnects

Direct SIP interconnects with EU wholesale carriers for A-Z termination. Multi-carrier LCR per destination with ASR-weighted failover.

Edge protection

SIP scanner mitigation and automated banning at the SBC, source-IP enforcement, signaling rate limits per source. DDoS protection at the network layer.

Follow one call through the network

Click each step to see what happens to a call between your system and the phone that rings.

# Signaling + media: security profile Signaling: SIP / UDP, TCP, TLS 1.2+ Media: RTP / SRTP (AES-128 / AES-256) Codecs: G.711 a-law, G.711 u-law, G.722, G.729, opus DTMF: RFC 2833, SIP INFO Fax: T.38 (transcoding on request) Transports: UDP, TCP, TLS Auth options: IP whitelist, digest, mutual TLS Source-IP cap: 8 IPs per trunk default CIDR support: /29 to /32, /28 on review

Encryption-ready, IP-locked, scanner-shielded

Encryption is available on every leg from customer SBC to carrier (where the carrier supports TLS+SRTP). IP authentication is the default for high-volume trunks. SIP registration is available for PBX and office deployments.

TLS 1.2+ on signaling for any customer that requests it
SRTP on media (AES-128 / AES-256) end-to-end where carrier-supported
Mutual TLS (mTLS) on request for sensitive deployments
Source-IP whitelisting enforced at SBC, not just provisioning DB
SIP scanner mitigation: fail-rate based banning, signature filtering
Per-customer signaling rate limits

Engineering ops, not "we'll look at logs if you call"

Every leg is captured, every CDR is rated, every metric is graphed. Customer-facing dashboards show per-route ASR, NER and PDD. Internal alerts fire before customers feel impact.

Per-customer dashboard: ASR, attempts, billable mins, top destinations
Per-route quality metrics windowed at 5/15/60-minute intervals
Full SIP capture retained for incident forensics
Active synthetic call probes from each PoP, every minute
An on-call engineer is paged automatically when a threshold is crossed

# Quality probe: last 24h, all routes ASR NER PDD all routes 52% 81% 2.1s UK · Mobile 61% 87% 1.8s DE · Mobile 58% 85% 2.0s FR · Landline 54% 82% 2.2s PL · Landline 47% 78% 2.4s # Internal alert thresholds ASR drop >15% in 15min pages on-call PDD >5s on top route pages on-call Carrier 5xx >2% / 5min falls back automatically

On the record

What a security or procurement review asks for

Service level agreement

Availability commitments, maintenance notice of seven days in writing, and how incidents are handled by the network operations centre, staffed 24 hours a day.

Read the SLA

Data processing agreement

A published agreement under UK GDPR covering call records and the personal data involved in routing calls. Call content is not stored unless recording is switched on.

Read the DPA