The Following IPs and Ports are used by the TotalCX Hosted Phone Platform (desk phones and mobile users) and are available for whitelisting reference.

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Phone System IPs & Ports
Mobile App
Endpoint Provisioning
- DHCP Options
- Yealink YMCS

Phone System IPs & Ports

IPs

Node	IP Subnet
US West	136.179.46.144/29
US Central	162.217.15.144/29
US East	155.130.141.144/29

Ports

Description	Port
SIP (UDP Only)	5060, 5080
RTP (UDP Only)	20000-27999
WebRTC (Web Phone // TCP Only)	8001, 9002

Mobile App

Mobile app users need to be able to communicate with the above IPs and ports as well as the following:

159.65.167.207
159.65.186.176
159.65.251.173
159.65.252.186
159.65.253.49
159.89.179.103
162.243.226.164
165.227.103.7 
165.227.115.186
165.227.182.9
165.227.184.188
165.227.190.186
165.227.210.221
165.227.223.68
165.227.65.164
167.99.119.203
167.99.119.244
167.99.48.91
2604:a880:0:1010::d31:1001
2604:a880:800:10::160:1
2604:a880:800:10::292:1
2604:a880:800:10::5db:1
2604:a880:800:10::62b:1001
2604:a880:800:10::69d:5001
604:a880:800:10::72d:b001
2604:a880:800:10::790:4001
2604:a880:800:10::7e:d001
2604:a880:800:a1::12f9:c001
2604:a880:800:a1::172b:7001
2604:a880:800:a1::172e:b001
2604:a880:800:a1::174f:e001
2604:a880:800:a1::176e:3001
2604:a880:800:a1::176e:5001
2604:a880:800:a1::1777:e001
2604:a880:800:a1::1777:f001
2604:a880:800:a1::1ad:1

Connections to these IPs occur on the following ports:

TCP	443, 4998, 5060, 5080, 7080, 24998
UDP	4998, 10000-65535 (RTP)

Endpoint Provisioning

DHCP Options

For zero-touch DHCP provisioning:

Option	String
43, 66, 160	http://endpoints.interactive.tel/cfg

Yealink YMCS IPs and Ports

The Yealink Management Cloud Services (YMCS) portal is for Yealink-specific hardware, these IPs and ports are used by the service to deliver provisioning URLs, commands, firmware, device configurations, and troubleshooting diagnostics to the phones.

Yealink's Official Doc

IP addresses:

microdm service	54.174.154.29 52.5.133.228
RPS	52.71.103.102 51.11.241.228 20.19.96.56 20.242.144.0 20.242.144.1
microtcp service	52.201.1.15 34.238.237.220 34.235.12.107 35.153.119.139
Web Portal Access	20.19.104.34 20.85.145.227

Ports:

YMCS

443, 80, 9989, 8443 (RPS)
8445 (YMCS API)
8446 (download config）

Service type	Domain name	IP	Port (TCP)	Description
Web portal	us.ymcs.yealink.com	20.85.145.227	443 (HTTPS)	Web access address.
Device connection	us-device-scheduler.ymcs.yealink.com	20.242.144.3	443 (HTTPS)	It is used for routing to the corresponding data center when devices (all device models) are first connected.
	us-app-scheduler.ymcs.yealink.com	20.88.189.229	443 (HTTPS)	App report address.
	redirect.ymcs.yealink.com	20.19.104.34	443 (HTTPS)	It is used for routing to the corresponding data center when the YRC/ YUC devices are first connected.
	us-device.ymcs.yealink.com	20.242.144.4	8110 (DM protocol)	Device connection address.
	us-device-req.ymcs.yealink.com	20.85.145.227	443 (HTTPS)	Hardware HTTP request address, used to distinguish between hardware long and short connection requests.
	us-device-compat.ymcs.yealink.com	20.242.144.6	8110 (DM protocol)	Compatible with MD5 certificate for device connection
	us-device-compat-req.ymcs.yealink.com	20.242.144.6	443 (HTTPS)	Compatible with MD5 certificate for device connection
Update Service	update.yealink.com	20.19.104.34	443 (HTTPS)	Address for firmware detection in the device’s automatic update service.
File upload/download	yiotbackenduseast1.blob.core.windows.net		443 (HTTPS)	File upload address.
	cdn-us-resource.ymcs.yealink.com		443 (HTTPS)	File download address.
	us-resource.ymcs.yealink.com	20.85.145.227	443 (HTTPS)	Resource storage address.
Reserved		20.242.144.0/29	443, 8110, 8443, 8445, 8446	Reserved
Redirection provisioning service	rps.yealink.com rpscloud.yealink.com	20.242.144.0 20.242.144.1 52.71.103.102	443 (HTTPS), 5061(phone_rps)	Yealink redirection service, for example, redirecting to your auto-provisioning server.