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Pro Backup, 08/05/2013 06:21 pm


Acrobits Groundwire

Account

User Details

Username 2233XXXXXX
Domain sip2sip.info
Display Name <empty>

Advanced settings

Incoming Calls On with Backgrounding
NAT Traversal ICE
Proxy proxy.sipthor.net:443
Auth User Name <empty>
Transport Protocol tls (sips)
VoiceMail Number <empty>
Expires 86400
Caller ID <empty>
Caller Id Method From Username

Sets caller ID headers of outgoing INVITE messages. Most VoIP providers will ignore these headers though.

SIMPLE Off

Enables SIP/SIMPLE messages to be sent and received.

Backgrounding Options

Host <empty>
Transport Protocol tls (sips)
Expires 86400
Track Errors On

NAT Traversal

Media ICE
Send Media Back Off
STUN Server stun2.dns-hosting.info:3478
TURN Username <empty>
TURN Password <empty>
Ignore Symmetric NAT Off
Discover Global IP Internal
Send keepalives Off
Outbound Proxy Enabled Off

Codecs for WiFi

  1. iLBC
  2. G.711 u-Law
  3. G.711 a-Law
  4. G.722
  5. Opus Wideband
  6. Opus Narrowband
  7. G.729a
  8. GSM
Packet Time 20ms
Force Packet Time Off

Higher packet times save bandwidth, but make the call quality more sensitive to packet loss. Bigger lost packets will make longer, more audible dropouts.

Honor Remote Codecs On

If set, local codec order will be ignored and the first supported codec from the list sent by remote will be used.

Codecs for 3G

  1. iLBC
  2. Opus Narrowband
  3. GSM
  4. G.729a
  5. G.711 u-Law
  6. G.711 a-Law
  7. Opus Wideband
  8. G.722
Packet Time 20ms
Force Packet Time Off
Honor Remote Codecs Off

DTMF Mode

Enabled DTMF Modes
  1. RFC2833
  2. SIP INFO
  3. audio
Send All Enabled Off

When turned on all enabled DTMF methods are sent simultaneously. If pressing a single digit results in multiple presses on the receiver side, just turn this switch off.

Secure Calls

SDES (RFC 4568)
Incoming Calls Enabled
Outgoing Calls Best Effort

A secure signaling channel is required for SDES. I.e. the protocol needs to be set to TLS. Due to security concerns it's also disabled for pushed calls. Please note SDES is prone to man-in-the-middle attacks and is largely dependant on the behavior of proxies along the SIP path. There may be hops between which the keys are transfered in clear text. If you would like to use SRTP over an insecure signaling channel you should try ZRTP instead.

ZRTP
Incoming Calls Enable
Outgoing Calls Disable

ZRTP is a media path key exchange method for SRTP. It can be used to secure calls even over insecure signaling channel (e.g. UDP). As opposed to SDES, it prevents eavesdropping opportunities at proxies. You will be able to accept ZRTP encrypted calls, however to initiate them you need to purchase the ZRTP add-on.

Hacks

RTP Port Start 10000
RTP Port End 65535
SIP Port <empty>
Forced Contact
Contact IP:port <empty>
Authorization
Send On Request Off
URI Scheme sip:
Nortelnetworks
Proxy-Require Off
SRTP
Prefer 80-bit Tags Off

Prefer 80-bit authentication tags over 32-bit tags.

Registration State
Reuse On
Adjust Via Off

The new registration will reuse the same Call-ID, CSeq sequence and rinstance as the previous one. We try to unregister stale contacts when network change. It's possible to alter Via headers to reflect Contact being unregistered.

Well-known codecs
Use rtpmap Off

It's not necessary to include rtpmap attributes for well known codecs, but some providers erroneously require it.