Administrator’s Guide for VP530 IP
Video
Phone
154
The web user interface pops up the dialog box to prompt “Rebooting, please
wait…”.
Secure Real-Time Transport Protocol (SRTP) provides means of encrypting the RTP
streams during VoIP phone calls to avoid interception and eavesdropping. The parties
participating in the call should enable the SRTP feature
simultaneously
. When this
feature is enabled on both phones, the IP phone will negotiate with the other phone
what type of encryption to utilize for the session. This negotiation process is compliant
with RFC 4568.
When a user places a call on the enabled SRTP phone, the IP phone sends an INVITE
message with the RTP encryption algorithm to the destination phone.
The sample of the RTP encryption algorithm carried in the SDP of the INVITE message
for reference:
m=audio 11780 RTP/SAVP 0 8 18 9 101
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:NmE2ZTZkZGY1NzAwNTViZDE4ZmFjYTJmN2E5N2M2
a=crypto:2 AES_CM_128_HMAC_SHA1_32
inline:NmI3MjJmNzk2MzkxMmY3ZjRhMmM0MTVmMTExNDUz
a=crypto:3 F8_128_HMAC_SHA1_80 inline:MjgzODc1ZDAyNDZlZmY0NjIyNjQ2MTY1N2JiOWE1
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:9 G722/8000
a=fmtp:101 0-15
a=rtpmap:101 telephone-event/8000
a=ptime:20
a=sendrecv
m=video 11782 RTP/SAVP 99 34 102
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:NDcwMjkyMjk0YjlhNTM0NzY0MmJmZDA2MjZkZWUw
a=crypto:2 AES_CM_128_HMAC_SHA1_32 inline:N2I3MjY1ZDIyNWY2NmI2ADczYTM0NjY2MjNkMzE3
a=crypto:3 F8_128_HMAC_SHA1_80 inline:NWViNWI2ZmEyNmZkMWU5ODRiNTgyMDc3NmVmYjJm
a=rtpmap:99 H264/90000
a=fmtp:99 profile-level-id=42800D; packetization-mode=0; max-mbps=11880
a=rtpmap:34 H263/90000
Summary of Contents for VP530 IP
Page 1: ......
Page 4: ......
Page 12: ......
Page 111: ...Configuring Basic Features 99...
Page 153: ...Configuring Advanced Features 141...
Page 171: ...Configuring Security Features 159...
Page 182: ...Administrator s Guide for VP530 IP Video Phone 170 Phonebook on page 266...
Page 183: ...Resource Files 171...
Page 194: ...Administrator s Guide for VP530 IP Video Phone 182 3 Click OK to confirm the resetting...
Page 195: ...Troubleshooting 183...
Page 344: ...Administrator s Guide for VP530 IP Video Phone 332...