Carrier & Wholesale
B2B voice, SMS, eSIM, numbering, interconnect and SLAs.
18 articles
What voice products do you offer?
VPX Carrier Voice provides A-Z wholesale voice termination via SIP and H.323 interconnect with dynamic QoS routing…
Read articleWhat SMS products do you offer?
VPX Carrier SMS provides wholesale A2P and P2P SMS on Tier-1 direct routes with verified DLRs and managed sender-ID…
Read articleWhat is VPX eSIM Connect+?
VPX eSIM Connect+ is programmable eSIM infrastructure for MVNOs, IoT platforms and retail. It is GSMA SGP.22/SGP.02…
Read articleHow do I get started with interconnect?
Complete the Carrier Voice or Carrier SMS onboarding application on our website. Our solutions team reviews…
Read articleWhat billing models and SLAs do you support?
We offer per-second voice billing with 1-second granularity, per-message SMS pricing and per-GB data pricing, with…
Read articleInterconnect onboarding checklist
From first contact to live traffic, voice and SMS interconnects follow the same path. Use this checklist to keep…
Read articleRouting changes, prefixes and traffic notices
Clean interconnects run on clean communication. This is how routing information flows between us. What we notify…
Read articleFraud controls on wholesale traffic
Fraud is the tax the whole industry pays. We run active controls on both directions of traffic, and partnership…
Read articleSettlement, invoices and payment terms
The commercial rhythm of an interconnect, in one page. Billing cycle Invoices are produced on the cycle set in your…
Read articleVoice troubleshooting - one-way audio, dead air and long PDD
The three classic media complaints, what usually causes them, and exactly what to send us so the first response is…
Read articleVoice troubleshooting - reading SIP rejects and cause codes
When calls fail before answer, the SIP response tells you which side to chase. The common ones on interconnects,…
Read articleSuspected false answer supervision (FAS) on a route
FAS is when a call is answered by the network rather than the person you called - you get billed for a…
Read articleCLI problems - missing, garbled or rejected caller ID
Caller ID on international routes is genuinely hard: every country has its own rules, and the CLI you send is only…
Read articleASR or quality dropped on a destination - how to report it
Route quality moves. When a destination's answer rates or audio quality degrade, a well-formed report gets it…
Read articleSMS troubleshooting - delivery failures and reading DLRs
The delivery receipt (DLR) tells you where a message died. Reading it correctly is the difference between a…
Read articleSender ID rules, registration and rewriting by destination
Sender ID is the most regulated corner of international SMS, and most "my brand name disappeared" tickets are…
Read articleSMS encoding - GSM-7, UCS-2, split messages and garbled characters
Encoding problems produce the strangest-looking tickets - question marks, boxes, messages split mid-word, or one…
Read articleSMS throughput, throttling and queuing
Submission speed and delivery speed are different things, and most "SMS is slow" tickets dissolve once the two are…
Read articleStill need help?
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