Ceexo – SIP Carrier Interop Form

1 Carrier & Commercial Information

Basic information about your organization and commercial contacts.

Carrier Legal Name *

Trading / Brand Name

Primary Website

Headquarters Address

Billing Address

Existing Agreement in Place?

Contract / MSA Reference #

Commercial Contact Name

Commercial Contact Title

Commercial Contact Email

Commercial Contact Phone

2 Technical Contacts & NOC

Who Ceexo should work with for engineering and outages.

Primary Technical Contact Name *

Technical Contact Title

Technical Contact Email *

Technical Contact Phone *

Technical Contact Time Zone

NOC / 24x7 Contact Email *

NOC Hotline / Phone *

NOC Portal / Ticketing URL

Normal Support Hours

After-Hours Escalation Procedure

3 Interconnect Overview

How we interconnect, authenticate, and what services are included.

Direction of Traffic

Inbound to Ceexo (terminating) Outbound from Ceexo (originating) Bidirectional

Services Included

Voice (SIP) Toll-Free International Long Distance Emergency / E911 CNAM Messaging / SMS

Call Authentication Method *

Ceexo IPs to Whitelist (if IP-based)

Carrier SBC IPs / FQDNs *

Registrar FQDN (if registration)

Registrar Port

Registration Username

Authentication Realm

4 SIP Signaling Parameters

Transport, addressing, and header expectations.

Supported SIP Transports

UDP TCP TLS

Preferred Transport

SIP Listening Port(s)

SIP Domains Used for Routing

From/To URI Number Format

If "Other", describe

P-Asserted-Identity / Remote-Party-ID Requirements

Diversion Header Requirements

Required SIP Methods

Early Media Supported?

183 with SDP Required?

Re-INVITE Behavior / Expectations

5 RTP / Media Parameters

Media IPs, port ranges, codecs, and DTMF.

Media IPs / Ranges *

RTP Port Ranges

SRTP Support

Supported Audio Codecs

Preferred Codec Order

Silence Suppression / VAD

DTMF Methods Supported

RFC2833 / RTP Events SIP INFO In-band

T.38 Fax Supported?

T.38 Hand-off Requirements

6 Numbering, Routing & Emergency

DID ranges, number formats, CNAM, and E911 details.

DID / Number Ranges Allocated to Ceexo

Inbound Number Format

Outbound CLI / ANI Format

CNAM Delivery Supported?

CNAM Name Length / Rules

E911 Support Provided? *

E911 Supported Regions / Countries

ELIN / ALI Update Mechanism

Test Call Procedures (e.g., 933 / 911 / 112)

7 Headers, Redirects & Session Timers

Special header requirements and session behavior.

Required SIP Headers

Headers to Strip or Rewrite

3xx Redirects Supported?

REFER / Transfer Behavior

Session Timers Supported?

Preferred Session-Expires (seconds)

Min-SE (seconds)

8 Security, Fraud Controls & Rate Limits

TLS, whitelisting, spend limits, and high-risk rules.

TLS Version / Cipher Requirements

Mutual TLS (mTLS) Required?

Ceexo SBC IPs to Whitelist

Allowed Countries / Destinations

Per-Channel / CPS Limits

Daily / Monthly Spend Limits

High-Risk Destination Policy

Blacklisted Destinations / Prefixes

Monitoring & Alerts

Traffic Spikes Fraud / Anomalies 5xx Error Spikes

Alert Delivery Methods

Email SMS Webhook / API Portal Only

9 Test Plan & Acceptance

Call scenarios, QoS targets, and test contacts.

Test Call Scenarios

Basic inbound/outbound calls DTMF / IVR navigation Transfers (blind/attended) Conference / 3-way calling International calls Toll-free calls E911 / emergency test (coordinated)

Target MOS

Max Jitter (ms)

Max Packet Loss (%)

Typical Round-Trip Latency

Test Lead Name

Test Lead Email

Test Lead Phone

Preferred Testing Windows

10 Support, Escalation & Maintenance

Escalation paths and maintenance notifications.

Escalation Path (L1 / L2 / Engineering)

Incident Severity Levels & Target Response Times

Maintenance Notification Policy

Typical Maintenance Windows

Notification Lead Time (e.g., 7 days)

11 Certification & Sign-Off

Confirmation that details are accurate and will be updated as needed.

Certification Statement

I certify that the information provided in this SIP Carrier Interop form is accurate and complete to the best of my knowledge. I understand that Ceexo will rely on this information to configure and secure interconnections between our networks, and that material changes must be communicated to Ceexo prior to implementation.

Authorized Signer Name *

Authorized Signer Title *

Authorized Signer Email *

Date *

SIP Carrier Interoperability Questionnaire