Cisco SRP521W-K9-G1 Administration Guide - Page 95

Configuring Voice Configuring Voice Services 6 Feature SIP Over TLS Description The SRP allows the use of SIP over Transport Layer Security (TLS). SIP over TLS is designed to eliminate the possibility of malicious activity by encrypting the SIP messages between the service provider and the end user. SIP over TLS relies on the widely-deployed and standardized TLS protocol. SIP Over TLS encrypts only the signaling messages and not the media. A separate secure protocol such as Secure RealTime Transport Protocol (SRTP) can be used to encrypt voice packets. SIP over TLS is configured in the SIP Transport parameter configured in the Line pages. See Line Pages (1-2), page 156. Registering to the Service Provider To use an Internet phone service, you must register your SRP to the Internet Telephony Service Provider (ITSP). NOTE Each line tab must be configured separately. Each line tab can be configured for a different ITSP. STEP 1 Log in to the Configuration Utility. If prompted, enter the administrative logon provided by the Service Provider. The default username and password are both admin. STEP 2 Under the Voice menu, click the Line (Line 1-2) to choose the line interface that you want to modify. STEP 3 In the Proxy and Registration section, enter the Proxy. STEP 4 In the Subscriber Information section, enter the User ID and Password. Cisco SRP500 Series Services Ready Platforms Administration Guide (SRP520 Models) 95