Specifications

SWITCHware System Administration Manual154

options are available:

· None No authentication is required or performed

· Plaintext* The weakest and most vulnerable method due to "secret" not being encrypted

· MD5* 128 Bit Hashing Encryption and widely used

· RC4 A stream cipher which is easily broken if the same key is used twice

· RSA** An asymmetric algorithm which relies on the difficulty of factoring very large numbers. RSA is

the most secure authentication method as of 2005. There are no known methods of feasible attacks.

* If MD5 or Plaintext authentication is selected, a secret must be provided in the "Secret" Field.

** If RSA authentication method is selected, then "RSA key" field becomes active. Please paste a valid RSA

key in the text box.

Codecs

Disallow

This field is very unique. In order to work properly the setting must be selected to "Disallow All." This

setting in essence resets the codec properties. Much like a firewall rule, prioritization is the key

element, you disallow all services and allow only the services (ports) you wish to permit.

Allow:

The system works in a way that it will first try to establish a connection with the first selected codec. If

the line is broken or cannot establish a connection with that specific codec, then the next codec chosen

will be used. A line will continue to try all codecs that are allowed before terminating.

Codecs available:

ITU G.711 ulaw (64 Kbps, sample-based, used in US)

ITU G.711 alaw (64 Kbps, sample-based, used in Europe)

ITU G.723.1 (5.3/6.3 Kbps, 30ms frame size)

ITU G.726 (16/24/32/40 Kbps)

ITU G.729 (8 Kbps, 10ms frame size)

GSM (13 Kbps (full rate), 20ms frame size)

iLBC (15Kbps,20ms frame size: 13.3 Kbps, 30ms frame size)

Speex (2.15 to 44.2 Kbps)

LPC10 (2.5 Kbps)

Auto Provisioning

This field set weather this UAD will be auto provisioned. If set to "Yes", user adding extension will need

to enter MAC address during extension add process. Additionally, DHCP "Yes/No" sets weather the

UAD will obtain its IP address by DHCP or Static methods.

17.7.2 IAX

Clicking on "Add/Edit" UAD and selecting IAX protocol will open standard options screen shown below.