Network and Firewall Requirements for TIPS Phones

Network and Firewall Requirements for TIPS Phones

As with all internet-connected technology, there are some requirements and best practices to be aware of when installing True IP phones. 

Requirements


The phones must be able to communicate with our servers on specific ports. Please open the following ports to each of our server's IP addresses for VOIP communications.

SIP IP Addresses and Ports

Server
Alias/Registration Proxy
IP Address
atlanta-nms.trueipsolutions.com
atlanta.outbound.tips
72.28.115.4
atl2-nms.trueipsolutions.com
atl2-nms.outbound.tips
72.28.115.5
charlotte-nms.trueipsolutions.com
charlotte.outbound.tips
198.24.51.162
dal-nms.trueipsolutions.com
dallas.outbound.tips
192.235.96.195
mcnc1-nms.trueipsolutions.com
mcnc1.outbound.tips
152.46.24.12
mcnc2-nms.trueipsolutions.com
mcnc2.outbound.tips
152.46.24.13
mcnc3-nms.trueipsolutions.com
mcnc3.outbound.tips
152.46.24.14
mcnc4-nms.trueipsolutions.com
mcnc4.outbound.tips
152.46.24.29

Purpose
Protocol
Port(s)
SIP Registration
TCP/UDP
5060
SIP TLS Registration
TCP
5061
RTP (Audio) Traffic
UDP
5000-60000
Application Communication
TCP
8001
Webphone Communication
TCP
9002

DISCLAIMER: SIP Trunks and other SIP Devices that are not using the Registration Proxy FQDN and are using the IP Address for Registration will not automatically fail over to an alternate server in the event the primary registration server goes down.

Provisioning IP Addresses and Ports

Server
IP Address
ndp.trueipsolutions.com
72.28.115.6

Server
Domain Name
IP Address
Port
Description
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 our auto-provisioning server.


There are some requirements related to the autoprovisioning of the phones as well as some maintenance and troubleshooting functions. Our provisioning server does not require any specific ports to be opened for inbound communication, simply allow the phones to contact 72.28.115.6 for provisioning. 

Fax Servers

Server
IP Address
faxback1.trueipsolutions.com
198.24.51.177
faxback2.trueipsolutions.com
192.235.96.196
Yealink maintains several servers that we use for advanced troubleshooting, provisioning, and maintenance, please whitelist the following IP addresses and ports. 

Updated 12/5/25
Server
Domain Name
IP Address
Port
Description
Device Connection
us-device-scheduler.ymcs.yealink.com
20.242.144.3
443 (HTTPS)
Used for routing to the corresponding data center when devices are first connected.

us-app-scheduler.ymcs.yealink.com
20.88.189.229
443 (HTTPS)
App report address

redirect.ymcs.yealink.com20.19.104.34
443 (HTTPS)
Used for routing to the corresponding data center when YRC/YUC devices are first connected.

us-device.ymcs.yealink.com
20.242.144.4
8110 (Device Management 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 (Device Management 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 connectionf
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

Note: Yealink advises that the above IP addresses are subject to change without warning and suggests that network administrators whitelist the domains instead. We will make every effort to keep this table updated.


Domain
*.ymcs.yealink.com
*.yealink.com

True Talk+ (Mobile Application)

If users will be using the True Talk+ mobile application on networks you control, there are several IP addresses and ports that need to be whitelisted to allow incoming calls and notifications while the application is in the background or the phone is asleep. 

SIPIS Whitelist

DNS Addresses
all.sipis.acrobits.cz

Ports
443/TCP
4998/UDP
4998/TCP
24998/TCP

If your firewall can't whitelist FQDNs, you may whitelist the following IP addresses instead.* 

IPv4
167.99.119.244
159.65.251.173
159.65.252.186
167.99.48.91
159.65.253.49
159.65.186.176
165.227.184.188
167.99.119.203
165.227.65.164
165.227.182.9
165.227.190.186
159.65.167.207
165.227.115.186
159.89.179.103
165.227.210.221
165.227.223.68
143.198.16.177
167.71.161.233
64.225.12.13
167.99.112.57
174.138.70.189
159.65.189.13
174.138.91.89
157.245.211.111
165.227.108.121
104.131.30.133
159.89.179.105
159.203.80.157
159.203.81.60
165.227.220.197
167.71.175.215
167.172.251.36

IPv6
2604:a880:800:a1::1777:f001
2604:a880:800:a1::176e:5001
2604:a880:800:a1::172e:b001
2604:a880:800:a1::176e:3001
2604:a880:800:a1::174f:e001
2604:a880:800:a1::172b:7001
2604:a880:800:a1::1ad:1
2604:a880:800:a1::1777:e001
2604:a880:800:10::7e:d001
2604:a880:800:10::292:1
2604:a880:800:10::5db:1
2604:a880:800:10::790:4001
2604:a880:800:10::160:1
2604:a880:800:10::72d:b001
2604:a880:800:10::69d:5001
2604:a880:800:10::62b:1001
2604:a880:800:14:0:1:c62b:c000
2604:a880:800:14:0:1:c62b:a000
2604:a880:800:14:0:1:c62b:b000
2604:a880:800:14:0:1:c62b:d000
2604:a880:800:14:0:1:c62b:e000
2604:a880:800:14:0:1:c62b:f000
2604:a880:800:14:0:1:c62c:0
2604:a880:800:14:0:1:c62c:1000
2604:a880:800:14:0:1:c62c:2000
2604:a880:800:14:0:1:c62c:3000
2604:a880:800:14:0:1:c62c:7000
2604:a880:800:14:0:1:c62c:9000
2604:a880:800:14:0:1:c62c:8000
2604:a880:800:14:0:1:c62c:b000
2604:a880:800:14:0:1:c62c:a000
2604:a880:800:14:0:1:c62c:c000

*Every effort will be made to keep this list up-to-date, however it can be verified at any time by resolving "all.sipis.acrobits.cz". Alternatively, you can use the below links to check the IP list online:

Register URL

The following address and port will also need to be whitelisted for registration purposes. 

FQDN
IPv4
IPv6
Port
reg.acrobits.cz
165.227.103.7
2604:a880:800:a1::12f9:c001
443/TCP

Network and Firewall Miscellaneous

  1. Phones do use LLDP and CDP by default. If not configured on your network it may need to be disabled on the phone. 
  2. Phones can be tagged on a specific VLAN by way of configuration overrides from our servers if needed.
  3. Many firewalls employ SIP ALG in some form. This is harmful to SIP traffic more often than helpful. Research your firewall to determine the best way to disable SIP ALG.

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