How to Simulate SIP over Ethernet
This page describes the way to simulate a SIP User Agent with the following
features:-
- Connection to an Ethernet network.
- Establishment of signalling and media channels using SIP.
- No registration with a Proxy.
Connecting the unit
The Clarinet Book USB Ethernet 10/100 uses the RJ45 or AUI port and can
be connected to a 10Base2 BNC connector by using:-
- An external transceiver (provided as an accessory) AUI-10B2
- The power supply of the Clarinet Book which provide the power to the
transceiver
Setting the test conditions for Ethernet profile
A new profile can be created with the Wizard from the template list
by selecting:-
- LAN application.
- Profile with a description including LAN, Simu,
PH=10BT DL=SIP
- Filter with a description including DL=MAC802.3/Auto/SIP
Example using the wizard:-
- Profile=>New=>LAN=>lan_simu_sip_ua.acp=>Filter?=>Lan_auto_sip.acf
The IP type simulation profile Sip_simu_mac_ua.aip invoked
by the Lan_simu_sip_ua.acp is automatically copied in
the same directory.
Both profiles (*.acp and *.aip) resulting from the wizard are ready for SIP simulation over an
Ethernet 10 Mbits interface.
Modifications can apply to the profile lan_simu_sip_ua.acp
- About physical interface:-
- IEEE 802.3 Init: RJ45 10 Mbits or 100 Mbits.
see also item Monitor
Tx messages in Interface specification
- About IP call simulator name
- About acquisition limited to a set of MAC addresses
- Save the profile under a new name:
- Profile=>Save as=>filename.acp.
Most of the modifications apply to the profile Sip_simu_mac_ua.aip
resulting from the copy.
Setting the addresses for basic SIP simulation profile
Profile Sip_simu_mac_ua.aip needs to have some modifications
of the default destination/source:-
- Open the profile:
- Profile=>Open IP...=>Sip_simu_mac_ua.aip
-
Modifications to setup the Emulators of the SIP User Agent:-
- Changing the MAC address: Initialise Initialize Emulator=>MAC
Setting the value of Own Ethernet address (hex)
- Changing the IP address: Initialise Initialize Emulator=>IP
Setting the value of Own IP address
Optionally the subnet mask and the Gateway address should be
added
That IP value will be used as IP source of
transmitted IP packets
- Changing the TCP hostname: Initialize Initialize
Emulator=>TCP-IP
(use-sockets)
Setting the value of Hostname
That value will be used to "auto-
update" URI's host of headers (Via, From, To, Contact..) in
SIP messages
-
Modifications to setup the SIP parameters of the SIP User Agent:-
- Setting the stack UDP / TCP to run SIP protocol Initialize
Emulator=>SIP=>SIP Protocol Parameters
- Selecting TCP or USP
- Setting value of TCP address port or UDP
address port
-
Modifications to setup the SIP messages used by the SIP-UA:-
- Changing the content of INVITE Generator=>SIPDestination1=>Edit
Setting the content of INVITE:
- URI of destination is set in the To field (start line will
be automaticaly updated)
- setting the content of body with sdp fields
That value and field "Content-sdp"
will be automatically added if the line is removed
- Changing the conditions for terminating calls Responder=>SIPSource1=>Edit
Setting the matching condition if find :
- by default the string is set the the beginning of the INVITE set
into Generator
If the conditions matches, it allows to reply
to the first INVITE; the other ones with the same content will be
discarded .
- Save the profile under a new name:
- Profile=>Save as=>filename.aip.
- Select this new name in the LAN profile and save it.
- Profile=>Save as=>filename.acp.
Running the profile
The profile is ready to generate one outgoing call and to terminate any
incoming call for 30 seconds.
To launch the profile:-
- Select Profile=>Run or click
on
 .
You will be able to select the name of profile (see Running
a test).
- The Event Editor window is automatically opened.
To stop the profile:-
- Click on
(see: Stopping
a test).
- The Event Editor window is automatically closed.
Troubleshooting over Ethernet
- No messages are displayed in the Event Editor window. Check if the
LED of the Clarinet Book show activity over LAN interface
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