Scan #5

Troubleshooting quick view

Need the raw evidence? Download ScanReport JSON · 2 artifacts

Issues & suggested fixes

• critical Voice-related ports are blocked: TCP 2160, TCP 5060, TCP 5222, TCP 5280, TCP 5281, TCP 59000, TCP 59500, TCP 60000, TCP 9080 (likely)

  10 of the voice-related ports we tested are not reachable from this PC. Calls and registration depend on these ports — if the firewall blocks them, phones either won't register or audio will be one-way.

  Fix: Allow outbound TCP 2160/5060/5061/5222/443 and UDP 10000-65000 to 199.15.180.0/22 on the firewall.

• critical Latency, jitter or packet loss outside VoIP comfort range (strong)

  1 target(s) showing unreachable / poor latency.

  Fix: One or more targets did not respond to ICMP. Some firewalls drop ping but still pass voice traffic — re-test against the Sangoma SBC with SIP OPTIONS to confirm reachability.; Packet loss above 3% will cause audible drop-outs. Check the WAN link, ISP throughput, and any in-path firewall rate-limits or buffer-bloat.

• warning VLAN 41 was not detected on this PC (inconclusive)

  Windows commonly cannot observe 802.1Q tags unless the NIC driver is explicitly configured to expose VLAN IDs or the switch port is a trunk. Treat 'not_detected' as 'we couldn't see it', not 'it isn't there'.

  Fix: If the phone or PC is meant to be on the voice VLAN, verify the switch port and NIC VLAN configuration.

• warning Some TCP probes were silently dropped (likely)

  Filtered TCP results can come from the local Windows firewall as well as upstream devices. Check Windows Defender Firewall outbound rules.

  Fix: Open Windows Defender Firewall and confirm no outbound rule blocks the StarPhone / SIP client.

• info IP assigned by: dedicated DHCP server (not the gateway) (likely)

  Adapter 'Wireless LAN adapter Wi-Fi' reports DHCP server 192.168.1.254 which differs from the gateway ?. A separate DHCP appliance or server is assigning IPs.

  Fix: Voice phones generally expect option 66/150 from the same DHCP server — confirm those options are configured on the dedicated DHCP host.

Latency / jitter / packet loss

Port test results (39)

Raw data & artifacts

Download the full ScanReport JSON, raw client log, and any packet captures uploaded with this scan.

• Full ScanReport JSON — canonical machine-readable scan data.
• report_json · report_5.json — 46.3 KB · uploaded 2026-05-03T23:54:07Z
• log · voipscan_evidence_20260503_235409.log — 53.8 KB · uploaded 2026-05-03T23:54:08Z