Issues with duplicate registrarion extension CME and third party phone

[ealfnav]

Hi friends.  A pleasure to write here!

 We have a problems with CME CISCO and third party phones (Grandtream gxp 16xx 26xx).

Phones and CME are working properly but there is a problem with registration SIP extension.

Grandstream phones add new register, when is restart o rebooted.  We can see the duplicate register with command "show voice register pool telefone-number 2001118 " here is log:

TES01A-CME-01#show  voice register pool telephone-number 2001118

Pool ID                                      IP Address                              Ln DN  Number               State

==== ======================================= ======================================= == === ==================== ============

18   C074.AD31.99C8                          192.168.0.39                            1  18  2001118$             REGISTERED

18   C074.AD31.99C8                          192.168.0.55                            1  18  2001118$             REGISTERED

18   C074.AD31.99C8                          192.168.0.70                            1  18  2001118$             REGISTERED

18   C074.AD31.99C8                          192.168.0.71                            1  18  2001118$             REGISTERED

18   C074.AD31.99C8                          192.168.0.73                            1  18  2001118$             REGISTERED

18   C074.AD31.99C8                          192.168.0.74                            1  18  2001118$             REGISTERED

                                                                                                                      2      18  2001118              UNREGISTERED
In this case only alive the last ip and phones is working properly. 

Also I can see on "debug voice register pool errors" this message, but I can´t solven it.

*Jan 16 09:40:42.602: VOICE_REG_POOL: Register request for (2001118) from (192.168.0.74)

*Jan 16 09:40:42.602: VOICE_REG_POOL: Contact matches pool 18 number list 1

*Jan 16 09:40:42.603:  Phone already registered

*Jan 16 09:40:42.603: Duplicate registration exists

I tested

-"registratios expires min max"

-remove busy trigger config

-invites messages

-upgrade phones etc,etc

Only  can you solvent the fails registration, removing voice register pool config and configure again or reload de CME.

Anybody has this problem? I´m fiding info on Internet but I have not luck.

Cisco Isr4300 Version 16.12.05

Many thanks for your support guys!

[pieterh]

from your output it looks like all phones use the same-mac-address to register at the call manager
a shared phone number is allowed, but MAC adress need to be different
-> check your phones configuration why this happens and why it is not using individual hardware MAC address

[ealfnav]

Hi pieterh

Here is the problem!. 
Each terminal has configured an unique Mac address. 
I assing mac addres for a unique voice register, the problem is that same phone, add new register in CME but only is available one. 

Option "register expires min xxx max xxx works fine win CISCO IP phones, bur are not with third party phones. 

Many thnaks for yout time