Operating Procedures for IRLP Users
Thanks to Dave Cameron VE7LTD, Amateur Radio is receiving
a new breath of life through his Internet Radio Linking
Project. Many repeaters around the world that were next to
empty are now alive and well with radio amateurs now speaking with other
hams around the world.
As with any new technology, it does take some time to
adopt to operating procedures that differ from conventional FM repeater
use. This work in progress can serve as a guideline for those
wishing to use their local IRLP enabled repeater node.
The following guidelines may differ from those provided by
your local node operator. These notes are only a guideline and at
no time should take precedence over the wishes of your local node
There are two connection modes for an IRLP connection. Direct
one-to-one or, one-to-many via a Reflector.
Direct connect is just like it sounds where repeater
(node) "A" connects direct with node "B". With
this type of link the two nodes are interconnected and no other IRLP connections
are possible. While repeaters "A" and "B" are connected,
anyone attempting to connect with either node will be told by a
recording that - "The node you are calling is currently connected
to callsign" however all local traffic on each
repeater will be heard on the other repeater as well.
While Direct Connect is preferred for a city to city chat,
the most common type of connection in use today is via
the Indianapolis Reflector ( Ref 9200 ). A reflector is a Linux computer that
is not connected to any radio but rather sits on lots of internet
bandwidth capable of allowing many repeaters to be inter-connected together by
streaming the received audio back to all other connected stations. At any
given time there are usually 10 to 20 repeaters around the world
interconnected via this Reflector. You can always check which
connected to the reflector by visiting http://status.irlp.net
and looking for nodes connected to individual nodes or reflectors.
With reflector use the first thing we must all remember is to leave a gap
between transmissions. Having said that this is a good time to list the
three main rules when connected to a reflector:
Due to the slight increase in delays created by multiple
Tone Squelch radios in the links between the repeater and IRLP link radio,
a slight change in our normal operating procedures is required with
By leaving a pause between transmissions it .....
The most important
guideline to remember is leaving a pause after pressing the PTT button
as well as between transmissions.
Reflector Guidelines Courtesy
Dave K9DC, Ref9200, Node 4730
Avoid local traffic while connected to the reflector.
By its nature, the reflector has a large footprint and a wide audience, therefore if local users would like to have a discussion, they should disconnect from the reflector. If we hear a local conversation (all participants coming from the same node) that continues, I, or one of the other reflector control ops will likely ask them to disconnect. If attempts to break into the conversation are unsuccessful, the node may be blocked from the reflector (more on blocking later).
Along the same line, if two stations become engaged in an extended dialog involving only themselves, then I would recommend they both move off the reflector and make a direct node to node connection, freeing up the reflector for others. If more than two nodes are involved, then moving to one of the lesser used reflectors might be an alternative, especially if one of the stations can check the web site for an available reflector. In the future, moving to one of the available sub-channels will become an option.
Calling CQ DX :-)
It IS acceptable to call CQ, in fact, if you really want to make a contact, it is preferable to say "This is K9DC calling CQ, is anyone available for a contact?" as opposed to "K9DC Listening" ...silence for 2 minutes, followed by a disconnect. However 3 x 3 x 47 CQs are unnecessary and should be left for CW/SSB
frequencies where tuning around is the observed practice. Odds are we heard it the first time.
It IS acceptable to talk about the weather, or anything else that is geographically significant. But like anything else, within reason. A station in Indiana that says to a Colorado op, "Hey I heard that you have a mountain out there" will probably cause eyes to roll worldwide.
In general though, long winded, channel consuming conversations should be avoided. Remember there are usually a dozen or two connected systems, with perhaps hundreds of users that might like a chance to use the system.
A few other Reflector operational guidelines:
Listen first. When connecting
to the main channel on Reflector 9200, odds are that you are dropping into an existing
conversation. Wait for at least 15 seconds to make sure you are not
interrupting an existing QSO before calling.
Pause between transmissions.
Many nodes are connected using simplex links, therefore the only time
it is possible for them to disconnect is between transmissions. Be
sure to pause AT LEAST 5 seconds between transmissions.
Key your transmitter and wait
before speaking. There are propagation delays across the Internet, as
well as delays caused by sub audible tone decoders and other devices
that cause a delay before the audio path is cut through. If you speak immediately upon PTT, the beginning of your transmission will not be heard.
Being BLOCKED from Reflectors.
IRLP reflectors have a management function allowing reflector control
operators to block specific nodes from accessing the reflector. When a node is blocked, the reflector ALWAYS automatically generates an e-mail message to the e-mail address of the Node owner as submitted to
databaseirlp.net. The e-mail should contain the specific reason for the block. This blocking is NEVER personal. It does NOT mean that we don't like you, but is only done to ensure continued operation of the reflector. Even my own node has been blocked.
Nodes are usually blocked for a technical malfunction, such as a locked COS, open squelch noise, extended hang time, or your repeater ID (with no user traffic) or courtesy beeps audible to IRLP, or any other problem that that impairs operation of the Reflector. Your node may also be blocked for rapid fire local traffic making it impossible for nodes to break in between transmissions.
Cross-linking other VoIP networks on IRLP reflectors is not allowed as
very few non IRLP VoIP systems mute Station IDs, hang timers and courtesy
tones. IRLP does not permit retransmission of any source that is not
part of a users PTT transmission. With 20 or more repeaters
connected together, shear chaos would result if this hard rule was not
The reflector control ops may try to contact a local control op on the air to advise the problem, however this may not always be possible. It is important that the node owner respond to the e-mail message advising the problem has been corrected.
If you have any other specific questions I can address, please send them along.
MAKING A DIRECT CONNECTION
First of all listen on your local machine for at least 15 -30 seconds before transmitting and then ask
if the repeater is currently in use. Assuming all is clear, identify
your self and give the node name or number you wish to call . Example: "VE3xyz
for the Sydney node" - - then enter the ON code for the node and
release your PTT. Your local repeater should come up
with a carrier as it waits for the connection to be authenticated.
This can take a few seconds of dead-air so don't be concerned. When
the connection is confirmed, the voice ID of the destination node will be
transmitted back to you as well as your nodes voice ID to the other
NOTE: If your node
is already connected to another node or reflector, a greeting will play
saying; - "your node is currently connected to...ID of the
connection") In this case confirm if anyone desires the
connection to remain up before dropping by using the OFF code..
Once connected and after hearing the confirming voice ID, wait at least 15
seconds before transmitting as.......
The repeater may
be in use, and your entry may have occurred between transmissions.
The voice ID of
your node is longer than the voice ID of their node, and the
connection is not made until the ID is fully played.
may be slower, and hence take longer to process the connection than
Press and hold the microphone PTT for a second and then
announce your presence and your intention such as you are calling someone
specifically or just looking for a QSO with another ham in that city.
If no response is heard, announce your call and your
intent to drop the link and then touch- tone in the OFF code. Not
a good idea to transmit touch-tone commands without first giving your
call-sign. Not only is this courteous it is a regulatory issue in
some countries who may be connected to the reflector.
Some nodes are configured so you cannot connect to them
if that repeater is active. In this case you will receive the message
"The node you are calling is being used locally" If
you receive this message wait 5 or 10 minutes and then try again.
If you stay connected to a node and there is no
activity on your repeater for 4 minutes, the connection will time out and automatically
disconnect with a voice ID disconnect message on both nodes.
WHAT ARE THE NODE CODES?
This is a very common question to which there is no single
answer. Some node operators choose to add a prefix to their
node. Also some nodes require membership so the easiest way to get
current codes is to contact the node operator or custodian. Use www.qrz.com
on the node call for an email address.
CONNECTING TO THE REFLECTOR
As above, listen to your local machine for local use and then announce your intention for
the Reflector before keying the ON command. When
you hear the confirmation ID always WAIT at least 15 seconds before
transmitting as you are most likely now connected with many repeaters and
a QSO could be in progress. If after 15 seconds you hear nothing,
identify yourself and indicate you are listening to the Reflector
from "City and, Prov./State,
Country". With the world wide IRLP activity your local repeater now
has world wide coverage thus the suggestion to better detail your QTH.
Don't be in a hurry to hear someone come back to
you. You may have to do a bid of pleading from time-to-time to
un-lodge someone from whatever they are currently involved with.
By default, connections to the reflectors now time out
with no activity however many node owners set this period for a long
period so it is not unusual for repeaters with minimal traffic
to stay connected to the Reflector for extended periods of
time. When or if the node times out from a Reflector connection
a standard time-out greeting will precede the
timeout saying, "Activity time out ...
Reflector xxxx, link off"
If you are new to IRLP you
should always consult with your local node sponsor to confirm the local
guidelines on reflector connections in your area.
If you hear or wish to engage in a prolonged rag-chew on
your local repeater (long discussion of a local nature) out
of courtesy to other node listeners drop the reflector.
From time-to-time you may receive error messages when attempting to
connect with a node or reflector. The most common ones are:
"The node you are calling
is not responding, please try again later"
This is caused by a loss of internet connectivity to one
end of the call attempt.
"BEEP Error- The call
attempt has timed out, the connection has been lost"
This error occurs when a node is OFF-LINE. Some
nodes such as in the UK use dial-up connections and then, only for short
periods. Also there may be temporary net or node problems.
"The Connection Has Been
If the internet connection drops, this error message will be
heard. I found this out when I accidentally kicked out my network
cable while working around the node computer.
In summary then a few do's and don'ts
between transmissions to let other in or others to enter DTMF command.
identify before sending DTMF command tones.
your microphone PTT for about 1 second before talking to allow all
systems time to rise.
rag-chew on your local repeater while connected to the reflector.
for 10 seconds or when entering the reflector before talking.
start or plan a Net without pre-authorization from the reflector
Many users of IRLP express desires to exchange QSL cards. With many
IRLP users not being on HF they may have never considered having
cards printed. Now here is a new Internet technology for you to
easily exchange QSL cards.
eQSL is a new electronic QSL service that allows you to
custom design your own card which is then formatted with your contact info
and automatically sent to your contact. (see the card that
I received from Chris VK6TNC
Morley, Western Australia.) While this eQSL generated
card is plain, you are able to create your custom card from many graphical
templates provided or upload your own graphic (see thumbnail of
mine here) to the eQSL web site. This graphic is then
used to automatically generate all of your outgoing cards with the contact
info like we see on Chris's card above.
The eQSL web site is http://www.eQSL.cc
You can check right now to see if you already have cards waiting by
placing your call in the form and pressing Search.
The eQSL service is free supported by some advertising and
Of course there is nothing like getting a real QSL card
via the bureau or direct. If sending cards direct your remember that
your local postage is not valid outside of your country so include a US
dollar bill or an IRC to cover return postage.
The return button below will return you to the page that
you linked from and feel free to link to this page.
Enjoy IRLP and pass the word.
Kitchener-Waterloo Amateur Radio Club Inc.
Sponsored and Hosted by
K-W IGS offering 3mb
DSL for $34.95
September 22, 2004 17:40