18.1.7. Secure SIP Connections 
Restrictions:
- Payload encryption with SDES is not supported on the STMI board.
- Payload encryption with MIKEY is only supported on SIP-Q trunks.
The security settings that are possible depending on the connection type
and gateway type. They are listed in the next table:
Table 85. Possible encryption depending on the connection type and gateway
|
Security
|
STMI board
|
vHG 3500/STMIX/STMIY
|
||
|
SIP Subscriber
|
||||
|
Signaling encryption
|
---
|
---
|
||
|
TLS
|
ok
|
ok
|
||
|
Payload encryption
|
---
|
---
|
||
|
SRTP with MIKEY - Key Management
|
---
|
---
|
||
|
SRTP with SDES - Key Exchange
|
---
|
ok
|
||
|
SIP-Q Trunk
|
||||
|
Signaling encryption
|
||||
|
TLS
|
ok
|
ok
|
||
|
Payload encryption
|
||||
|
SRTP with MIKEY - Key Management
|
ok
|
ok
|
||
|
SRTP with SDES - Key Exchange
|
---
|
ok
|
||
|
Native SIP Trunk
|
||||
|
Signaling encryption
|
||||
|
TLS
|
ok
|
ok
|
||
|
Payload encryption
|
||||
|
SRTP with MIKEY - Key Management
|
---
|
---
|
||
|
SRTP with SDES - Key Exchange
|
---
|
ok
|
||