Operational, Basic, and Advanced Parameters
A-72 41-001160-00, Release 2.1, Rev 04
IP Phone Administrator Guide
Appendix A
Transport Layer Security (TLS) Settings
Parameter –
sip transport protocol
Transport Protocol
(in Web UI)
Aastra Web UI Advanced Settings->Global SIP->
Advanced SIP Settings
Configuration Files aastra.cfg, <mac>.cfg
Description Specifies the protocol that the RTP port on the IP phone uses to send
out SIP signaling packets.
Notes:
1. If you set the value of this parameter to 4 (TLS), the phone checks
to see if the “sips persistent tls” is enabled. If it is enabled, the phone
uses Persistent TLS on the connection. If “sips persistent tls” is
disabled, then the phone uses TLS on the connection. If TLS is used,
you must specify the Root and Intermediate Certificates, the Local
Certificate, the Private Key, and the Trusted Certificates.
2. If the phone uses Persistent TLS, you MUST specify the Trusted
Certificates; the Root and Intermediate Certificates, the Local
Certificate, and the Private Key are optional.
Format Integer
Default Value 1 - UDP
Range Valid values are:
0 - User Datagram Protoco l (UDP) and
Transmission Control Protocol (TCP)
1 - UDP
2 - TCP
4 - Transport Layer Security (TLS)
Example sip transport protocol: 4