General SIP information
SIP addresses
DIDWW originates calls to customers from the following SIP endpoints:
Location |
IPv4 address |
IPv6 address |
|---|---|---|
New York |
46.19.209.14 |
2a01:ad00:1:14::14 |
Frankfurt |
46.19.210.14 |
2a01:ad00:2:14::14 |
Los Angeles |
46.19.212.14 |
2a01:ad00:4:14::14 |
Miami |
46.19.213.14 |
2a01:ad00:5:14::14 |
Singapore |
46.19.214.14 |
2a01:ad00:6:14::14 |
Hong Kong |
46.19.215.14 |
2a01:ad00:7:14::14 |
Amsterdam |
185.238.173.14 |
2a01:ad00:8:14::14 |
These IP addresses correspond to our routing cluster exit nodes. For UDP transport we send signaling from port 5060. For TCP and TLS we originate connections from port range 5070-65535
RTP addresses
Our system sends RTP packets from the following subnets:
46.19.208.0/21
185.238.172.0/22
2a01:ad00:1:2::/64
2a01:ad00:1:14:1::/64
2a01:ad00:2:1::/64
2a01:ad00:2:14:1::/64
2a01:ad00:4::/64
2a01:ad00:4:14:1::/64
2a01:ad00:5::/64
2a01:ad00:5:14:1::/64
2a01:ad00:6::/64
2a01:ad00:6:14:1::/64
2a01:ad00:7:1::/64
2a01:ad00:7:14:1::/64
2a01:ad00:8:1::/64
2a01:ad00:8:14:1::/64
with RTP port-range: 1024-65535
RTCP
We transmit and receive RTCP packets from port = rtp_port + 1 (as recommended in RFC3550). Additionally, we are able to receive RTCP packets on the same port as RTP, considering utilizing RTCP conflicts avoidance payloads (payload types 72-76).
SIP OPTIONS
DIDWW is responding on SIP OPTIONS while sending requests to signaling IPs. It will respond on UDP 5060, TCP 5060 and TLS 5061 ports.
Please note that SIP OPTIONS responses are not related to call processing.
Encryption
Our systems supports TLS as a secure transport for SIP signaling and SRTP as a media encryption mechanism. All three SRTP key negotiation mechanisms are supported - SDES, DTLS and ZRTP.
Warning
The SRTP media encryption and TLS SIP transport are disabled by default. Please contact our sales team sales@didww.com to allow traffic encryption for your account.
Supported codecs
G.711 A-law/U-law
G.729
G.723.1
L16
G.726-16/G.726-40/G.726-32/G.726-24
G.721
GSM
Speex
DTMF transport methods
DTMF signaling is supported as follows:
Telephone-event RFC2833
SIP INFO draft-kaplan-dispatch-info-dtmf-package-00
application/dtmf-relay
application/dtmf
By default RFC 2833 enabled