HELP CISCO, MODEL- ASA 5506

[Danny@dtll.co.uk]

My client has a office on a Serviced Building , there is a lease line and they have connected to that a CISCO, MODEL- ASA 5506, SN: JMX2201G04G And it's working fine.

The network IP is 10.24.10.170 and problem is when I connect 2 IP phones, That have DHCP ON , the phones get 192.168.89.94 and 192.168.89.95 and show on the display no service.

I have changed manually the IP of the phones to 10.24.10.180 and 10.24.10.181. but when I connect the phones to the network, is not working.

If I take the phones and connect at my house or at my office that don't have a Cisco router it works fine.

The phones are Yelink T21

The it people they said that the Cisco has no outbound restrictions.

Please help

Regards

Danny

[1damianjones]

Check your DCHP 150 for your TFTP server.

[1damianjones]

Also sounds like your phones are getting the DHCP from a different source.  Do you have consumer access points on your network?  If so make sure they have their DHCP servers disabled.