Cisco Call Manager Express (CME) – Third Party SIP Phone Configuration
Originally posted on June 25, 2022 @ 5:25 pm
Cisco Call Manager Express (CME) – Third Party SIP Phone Configuration
We have been configuring Cisco IP Communicator / Cisco IP Phone like 79XX model in Cisco CME using SCCP but today lets configure Third Party SIP Phone using SIP Protocol and get it registered to CME.
Let’s start now – Assuming that you have configured the IP Address and made the E1/T1 up. With the below configuration i was able to register a Third Party SIP Phone.
configure terminal
voice service voip
allow-connections sip to sipvoice register global
mode cme
source-address 10.1.1.50 port 5060
max-dn 35
max-pool 10
authenticate register
authenticate realm localvoice register dn 1
number 82011000
name 82011000
label 82011000voice register pool 1
id mac 0000.0000.0001 [[I have provided a dummy Mac-id]]
number 1 dn 1
username 82011000 password 82011000
I could see that my Third Party Phone has got an extension and i could also verify the same in the CME by typing the below commands.
R1#show sip-ua status registrar
Line destination expires(sec) contact
call-id
peer
============================================================
82011000 10.1.1.5 118 10.1.1.5
N2EyZmUyM2MxZDM4MTg2NDQyYzNmODc2YjFkZDNlZDk.
40001
Did you see, its very easy to configure a Third Party SIP Phone in CME. To test the same you can use the below applications in android like CsipSimple or Sipdroid and windows like X-lite.
Note:- The configuration only shows the registration of Third Party SIP Phones but however it wont perform call routing until and unless other necessary configuration are done.

I am working in an IT company and having 10+ years of experience into Cisco IP Telephony and Contact Center. I have worked on products like CUCM, CUC, UCCX, CME/CUE, IM&P, Voice Gateways, VG224, Gatekeepers, Attendant Console, Expressway, Mediasense, Asterisk, Microsoft Teams, Zoom etc. I am not an expert but i keep exploring whenever and wherever i can and share whatever i know. You can visit my LinkedIn profile by clicking on the icon below.
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would the same configuration work for the Cisco SPA 300 & 500 series?
could you also post the configurations for connecting CME to PSTN line?
thanks
James