Advanced

The Advanced tab allows you to specify how the SIP server will perform NAT translation, and whether the server will use a parent SIP proxy.

Figure. Advanced section.

Field	Description
Use Telephone/E164 Number Mapping (ENUM)	Check this box to enable your users to place calls to standard telephone numbers. The ENUM system allows a standard telephone number to be dialed from a SIP client. The SIP server will check for a NAPTR DNS record based on the number dialed (the 164.arpa server is tried out, if record not found, then the e164.org one.) Note: The option mentioned above has higher priority than SIP gateways (if used.)
Use extended DNS lookup (NAPTR and SRV)	Select this option IceWarp Server to check for SRV and NAPTR DNS records to determine the hostname for a SIP server. IceWarp Server checks for a NAPTR DNS record first and, if not found, it will check for an SRV DNS record. Syntax and examples of SRV DNS records: _sip._udp.<Domain>. 86400 IN SRV 0 0 5600 sip.<Host>. _sip._tcp.<Domain>. 86400 IN SRV 0 0 5600 sip.<Host>. _sip._tls.<Domain>. 86400 IN SRV 0 0 5601 sip.<Host>. _sip._udp.icewarpdemo.com. 86400 IN SRV 0 0 5600 sip.icewarpdemo.com. _sip._tcp.icewarpdemo.com. 86400 IN SRV 0 0 5600 sip.icewarpdemo.com. _sip._tls.icewarpdemo.com. 86400 IN SRV 0 0 5601 sip.icewarpdemo.com. For more details, refer to http://www.ietf.org/rfc/rfc3263.txt.

Field

Description

Use Telephone/E164 Number Mapping (ENUM)

Check this box to enable your users to place calls to standard telephone numbers.

The ENUM system allows a standard telephone number to be dialed from a SIP client.

The SIP server will check for a NAPTR DNS record based on the number dialed (the 164.arpa server is tried out, if record not found, then the e164.org one.)

Note: The option mentioned above has higher priority than SIP gateways (if used.)

Use extended DNS lookup (NAPTR and SRV)

Select this option IceWarp Server to check for SRV and NAPTR DNS records to determine the hostname for a SIP server.

IceWarp Server checks for a NAPTR DNS record first and, if not found, it will check for an SRV DNS record.

Syntax and examples of SRV DNS records:

_sip._udp.<Domain>. 86400 IN SRV 0 0 5600 sip.<Host>.

_sip._tcp.<Domain>. 86400 IN SRV 0 0 5600 sip.<Host>.

_sip._tls.<Domain>. 86400 IN SRV 0 0 5601 sip.<Host>.

_sip._udp.icewarpdemo.com. 86400 IN SRV 0 0 5600 sip.icewarpdemo.com.

_sip._tcp.icewarpdemo.com. 86400 IN SRV 0 0 5600 sip.icewarpdemo.com.

_sip._tls.icewarpdemo.com. 86400 IN SRV 0 0 5601 sip.icewarpdemo.com.

For more details, refer to http://www.ietf.org/rfc/rfc3263.txt.

Figure. NAT Traversal section.

Field	Description
Use RTP NAT Traversal proxy and streaming server	Check the box if you want to use NAT Traversal feature. Use API and API console to manage proxy and streaming server settings. (Use the rtp string to filter API variables.) Note: NAT Traversal has a limitation of concurrent calls. The c_system_services_sip_rtpmax API variable sets the number of RTP streams. The number of concurrent calls is 1/2 of this value. Note: Remember: The higher number of streams, the higher use of resources.
Local RTP port range from	You need to specify the ports to be used as proxies by the SIP server. You should specify the start of the port range to be used.
Local RTP port range to	Specify the last port of the range to be used. Note: The port range specified here must be open in your router/firewall setup.

Field

Description

Use RTP NAT Traversal proxy and streaming server

Check the box if you want to use NAT Traversal feature.

Use API and API console to manage proxy and streaming server settings. (Use the rtp string to filter API variables.)

Note: NAT Traversal has a limitation of concurrent calls. The c_system_services_sip_rtpmax API variable sets the number of RTP streams. The number of concurrent calls is 1/2 of this value.

Note: Remember: The higher number of streams, the higher use of resources.

Local RTP port range from

You need to specify the ports to be used as proxies by the SIP server.

You should specify the start of the port range to be used.

Local RTP port range to

Specify the last port of the range to be used.

Note: The port range specified here must be open in your router/firewall setup.

Figure. Other section.

Field	Description
Contact: registration expiration (Sec)	Specify a value to tell clients that they should re-register with the server at the interval specified. This can be very useful to keep the client/server connection alive.

Field

Description

Contact: registration expiration (Sec)

Specify a value to tell clients that they should re-register with the server at the interval specified.

This can be very useful to keep the client/server connection alive.

Figure. Call Dialer Agent section.

Field	Description
Alias	Enter a call dialer alias.
Name	Enter a call dialer name. When initiating a SIP call, a server rings the caller's phone first. This name is shown on the phone display.

Field

Description

Alias

Enter a call dialer alias.

Name

Enter a call dialer name.

When initiating a SIP call, a server rings the caller's phone first. This name is shown on the phone display.