Testing Isdn Connections; Using Answer Routes For Sessionless Isdn Calls - Codec Tieline ViA User Manual

Trace the Route of IP Packets
Another utility available on your PC is traceroute. This tool can be used to determine the route and
number of hops that data packets are taking to their destination (codec). This is useful because the
more routers that packets traverse, the more latency your connection will have, and the less reliable
it will be.
i. Point to the start menu on your PC and click once.
ii. In the search text box type Run and press Enter.
iii. Type CMD in the Run dialog text box and click OK.
iv. Type tracert, the IP address of the codec you are contacting (i.e. tracert 203.36.205.163)
and press the Enter key on your keyboard.
34.5

Testing ISDN Connections

To test your ISDN line is working you can dial a standard phone line or your cell-phone number. If
the call is successful this verifies the line is active. To verify ISDN data is being sent you can:
· Dial a codec you know is connected to an active ISDN line, e.g. another codec in your
network or a Tieline test codec.
· Dial the test ISDN data number provided by your Telco (when available).
· Create a program and perform a loopback test by dialing out on the main ISDN number and
receive the call on the auxiliary ISDN number. (Note: To create a loopback program create a
2 x Mono or Stereo Peer-to-Peer program and configure a dial only audio stream using your
main ISDN number. For the second audio stream create an answer only audio stream
connection configured for ISDN. If you dial the connection and can hear the audio you are
sending on the return B channel, you have confirmed ISDN data is being sent successfully.
· If you dial using a loopback program and a "disconnect" message appears, you may have
the incorrect Line Type configured. Change the Line Type setting and this should hopefully
resolve the issue.
On-Demand ISDN Services
If Sync appears for approximately 60 seconds when you connect an ISDN line to the codec and
then disappears, or if Sync does not appear and you know you are connected to an active ISDN
interface, then the line may have 'On-demand' enabled by your Telco. To test this you can dial a
codec on an ISDN line known to be operational. Dial over ISDN and if Sync appears after connecting
it indicates the service has now been activated. Disconnect and then dial again. If this dial is
successful 'On Demand' is enabled. We recommend you contact your network service provider and
get them to disable 'On Demand' to circumvent any possible connection issues.
34.6

Using Answer Routes for Sessionless ISDN Calls

Tieline Genie Distribution, Merlin, Merlin PLUS and ViA audio codecs support multiple connections
using a variety of connection transports such as IP, ISDN and POTS. Tieline codecs support using
Tieline session data, which assists with configuration and routing of multiple incoming calls to
these codecs. In addition, audio ports can be used to successfully route IP calls to your preferred
codec inputs/outputs.
If you are accepting calls from multiple non-Tieline ISDN codecs then you will be making
"sessionless" connections which require the codecs at both ends to be configured with the same
connection settings. In addition you can use "Answer Routes" and 'site-specific' module settings in
Genie Distribution and Merlin PLUS to route incoming calls to specific codec outputs. (Note: Merlin
© Tieline Research Pty. Ltd. 2020
ViA User Manual v3 411