CONNECTIVITY
SIP trunking for an existing PBX
Last verified 2026-10-28 · 10 SIP trunking provider and 9 Communications API (CPaaS) checked
What this job needs
Required
SIP trunks11/15
Works with your existing PBX7/15
E911 service9/15
Number porting8/15
Depends on your situation
Microsoft Teams Direct RoutingYour PBX is Microsoft Teams
Right column on Required: share of tracked products that pass the feature check (included or available as an add-on).
Which tool type, and when
SIP trunking providerBest at your volume
5 qualifying products. Most also offer: Microsoft Teams Direct Routing.
Median cost$4.32/mo
Communications API (CPaaS)Best at your volume
1 qualifying product. Most also offer: Microsoft Teams Direct Routing.
Median cost—
Products that pass every required check
Ranked by fit, then cost at 25 channels. 6 of 15 tracked products pass; products failing a required feature are not listed.
| Product | Type | Fit | Monthly cost | Incidents (90d) | Customers with this setup |
|---|---|---|---|---|---|
| SIP.US | SIP trunking provider | 4/4 | $1US48 Local DID | — | 0 |
| Telnyx | Communications API (CPaaS), SIP trunking provider | 4/4 | $3.84Receive inbound calls | — | 1 |
| DIDWW | SIP trunking provider | 4/4 | $4.80Local Outbound Termination | — | 2 |
| Flowroute | SIP trunking provider | 4/4 | $6Domestic Inbound rate | — | 2 |
| Bandwidth | Communications API (CPaaS), SIP trunking provider | 4/4 | — | — | 2 |
| Sinchin review | Communications API (CPaaS) | 4/4 | — | — | 1 |
Cost includes add-ons this job requires. Incidents from public status pages. Customers counted from recorded customer setups.
Who already runs this
- BPO AND CALL CENTER OPERATORS · NULL STAFFBandwidthCommunications API (CPaaS), SIP trunking providerSource: customer case study
- MSPS AND TELECOM RESELLERS · NULL STAFFBandwidthCommunications API (CPaaS), SIP trunking providerSource: customer case study
- SAAS AND TECH · NULL STAFFDIDWWSIP trunking providerSource: customer case study
- RETAIL · NULL STAFFDIDWWSIP trunking providerSource: customer case study
- MSPS AND TELECOM RESELLERS · NULL STAFFFlowrouteSIP trunking providerSource: customer case study
- EDUCATION · NULL STAFFFlowrouteSIP trunking providerSource: customer case study
- SAAS AND TECH · NULL STAFFSinchin reviewCommunications API (CPaaS)Source: customer case study
- MSPS AND TELECOM RESELLERS · NULL STAFFTelnyxCommunications API (CPaaS), SIP trunking providerSource: customer case study
Publication status: not indexed yet
- Requirement profile is a draft