Hello Thomas, I have the same problem, how can I use dial peer or another solution because I need put a long number phone with 13 digits ( for example 1977 056 223333)
Thanks for your answer, I solved going to http://www.cisco.com/en/US/docs/voice_ip_comm/csbpipp/ip_phones/user/guide/spa300_sip.pdfand the steps are sames that your content link, thanks for your help.