Specifications

SWITCHware System Administration Manual46

Incoming Limit:

number of channels allowed for incoming calls.

Outgoing Limit:

Number of channels allowed for outgoing calls.

6.1.1.1.5 Codecs

Trunks codecs create default codecs values a trunk is allowed to use for media streams. These value depends

on service providers offering since every service provider has a preference on codecs used on their systems.

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 next codec chosen will

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

Codecs available:

ITU G.711 (64 Kbps, sample-based also known as alaw and ulaw)

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)

6.1.1.1.6 Security

This section explains a basic IP address security available. If set, the trunk will only be able to communicate

with IP address or network set in "Deny" and "Permit" fields.