Yealink SIP-T21 E2

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
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Incoming Signaling Validation
Yealink IP phones support the following three optional levels of security for validating incoming
network signaling:
 Source IP address validation: ensure request is received from an IP address of a server
belonging to the set of target SIP servers.
 Digest authentication: challenge requests with digest authentication using the local
credentials for the associated registered account.
 Source IP address validation and digest authentication: apply both of the above methods.
Procedure
Incoming signaling validation can be configured using the configuration files.
Central Provisioning
(Configuration File)
<y0000000000xx>.c
fg
Configure incoming dignaling
validation.
Parameter:
sip.request_validation.source.list
sip.request_validation.digest.list
sip.request_validation.digest.realm
sip.request_validation.digest.event