How to register a ciscophone in an asterisk?

Question

Asterisk

Registered in asterisk sip and extensisons.
The Zoiper softphone worked as it should.
In spa502g and spa122 I registered a static ip, host, userid and password.
the asterisk writes that spa502g is wrong password. About spa122 in general, neither a rumor nor a spirit (
Explain. Please, what needs to be registered where.
Or leave the manuals.

Answer 1

Corrected sip.conf like HERE - it worked))

Answer 2

Read here:
asterisk.ru/knowledgebase/Asterisk+config+sip.conf
www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/cs...
And try using passwords of different lengths: somehow it happened that one of the old cisco machines did not work with a password that was too long.