CallSentry — Network & VoIP Diagnostics

Target

Host / IP

SIP Port

Profiles

Asterisk Pbx

Cisco Catalyst Switch

Cisco Spa504g

Faxstation Trunk

Fortinet Fortigate

Freepbx Pbx

Generic Fiber Ont

Generic Nat Router

Generic Sip Trunk

Grandstream Gxp Series

Netgear Prosafe Switch

Pbxact Pbx

Peplink Balance

Poly Edge E Series

Poly Vvx Series

Sangoma S Series Phone

Sipstation Trunk

Snom D Series

Star2star Box

Switchvox Pbx

Yealink T4x Series

Yealink T5x Series

Symptoms (optional)

Select any symptoms you're seeing — helps rank likely causes.

Phone cannot register

Phone shows 'Registration Failed', 401 Unauthorized, or cannot connect to PBX

One-way audio

Can hear the other party but they cannot hear you, or vice versa

Choppy or poor audio quality

Audio cuts in and out, is robotic, has echo, or sounds delayed

Calls drop after connecting

Calls connect successfully but disconnect after a short time

DNS failure

Cannot resolve hostnames; DNS lookups are failing or returning errors

SIP ALG suspected

Router SIP ALG may be rewriting SIP headers and breaking calls or registration

No connectivity to PBX

Cannot reach the PBX server at all; all connection attempts time out or fail

DTMF key presses not working

Key presses during calls do nothing — IVR menus, voicemail PINs, or hold music fails

Manual Evidence (optional)

Paste router CLI output, ip route, Asterisk logs, or any relevant text. The scanner extracts facts automatically.

Paste evidence here

Source tool

Environment Hints (optional)

SIP ALG is enabled on this network

G.729 codec is in use

Run live network probes (gateway, DNS, port checks)