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Category: Law

ACK Delay causes and solutions.

 

AES ACK delay definition

An Acknowledge Delay will occur after an antenna cut or loss of communication with the network. An Acknowledge delay occurs when a Packet Acknowledge (P_ACK) is not received for a transmitted Data Packet within the programmed Acknowledge Delay time. (Default Ack Delay Time for the fire subscriber unit is 60 seconds).  An Acknowledge delay occurs when a Packet Acknowledge is not received for a transmitted Data Packet within the programmed Acknowledge Delay time.

What it boils down to is either your signal strength is weak (NetCom 6 or higher) or your signal acknowledgements are taking a few seconds to come back.  Yes, that can happen even if you have a NetCom of 5. The majority of the ACK Delays generated on the network I help maintain occur because of delayed acknowledgements not NetCom or 6 higher issues.

Some of you might be asking yourselves so what if I have acknowledgement delays my signals report on time in less than a minute and I passed my fire inspection WHO CARES? Well the problem is now that jurisdictions are requiring local notifications of radio faults.  The 2016 fire code focuses more on local notifications of radio issues including antenna cuts ac fails acknowledgement delays and other hardware issues.

Aes radios have a J4 Relay the main board that you can set up for normally open or normally close.

 

 

 

ACK DELAY SOLUTIONS 

 

According to AES:

 Look for trouble with the antenna or its location, coax, connectors, transceiver, radio or electrical Interference or with the electronics itself. Maybe the subscriber is just to far away

From other devices in the network. The problem could also be with the other Subscribers or receiver it is attempting to communicate with.

 

That is too vague of an answer. The solutions I have come up with usually work.

 

  1. (This is our problem on our network usually.) The subscriber can be directly talking to an IP LINK instead of other radio units around it.  I know it makes sense that you would want a radio to talk directly to the data node but the problem is data nodes are always busy and can delay signal confirmation.   We have some units with remote antennas that jump 20 miles to talk to a repeater on a building 70 stories in the air vs AES units or repeaters closer to its location.  A stronger antenna is not always better.  To find out if this is happening to you use the NMS Google Earth to view the paths. Right click on a path and it will tell you how far it travels.  You can also check the paths using the Linux interface they have for the AES receiver.

NMS example of ack delay accounts

 

 

 

 

  1. Sometimes or most of the time techs will install the rubber ducky antennas and tighten the washers by hand. The problem with that is the washer does not dig into the can and create good enough grounding. This can cause signal strength issues, NetCom, and ACK Delays.

 

  1. The AES install manual for 7788 units instructs techs to ground the radio using the Green nut on the right middle side of the radio. That goes to earth ground. I’ve been told by techs on site it has improved their signal strength.

 

  1. Sometimes ACK Delays are caused when your radio is NetCon 6 or higher. If you have a handheld programmer hit shift + f4 at the same time to get the NetCon rating.  It should be at NetCon 5 all the time.  If not check the rubber ducky install or battery and or install a remote antenna.  

 

 

  1. I have noticed that some ACK Delays occur when a radio starts repeating too many signals. It is normal for some Subscribers to repeat RF packets originating from other Subscribers, to convey those packets along their route toward an IP Link. However, excessive packet repetition by a single Subscriber may reduce network efficiency and cause delays. I have witnessed units 5 to 15 miles away talking to specific radios and ignoring many radios around the immediate area.   Check in your NMS software for the TOP REPEATERS section.

 

  1. Sometimes radios are programmed incorrectly and the test interval is off. Each Subscriber normally transmits Check-in messages at regular, pre-set intervals. AES recommends setting the Subscriber Check-in interval to 23:45. A shorter time interval increases RF traffic in the network. When a radio checks in it submits a bunch of data. Once a day is fine but multiple times an hour is a no no.

 

 

 

I think I covered everything that can cause an ACK Delay but if I missed something leave a comment. If this helps, leave a comment. 

Updated: March 27, 2017 — 7:41 PM

How America’s Economy Works.

A man wakes up in the middle of nowhere. He has no money, he doesn’t know where he is and there is absolutely nothing around him, except for a small diner. The man walks towards the diner, where a sign reads “eat all you want, your grandchildren will pay”.

 

The man walks in, eats like there is no tomorrow and, when he is done, a waitress walks up to him and gives him the bill. “Wait, I read the rules carefully.” says the man.”I know,” replies the waitress “this is your grandfather’s bill.”

Updated: March 8, 2017 — 11:20 AM

How Ammunition Bans Impact Hunters

How Ammunition Bans Impact Hunters

Trying to ban ammo is just a sneaky way of illegal gun control. Stop trying to sneak gun control in and do it the legal way. Make a ammendment. Get the majority of the states to agree and make it a national law.  But you can’t because the states won’t agree to banning guns. Neo state police cowards will stop at nothing to get around our legal rights to own guns.

 

Updated: March 23, 2016 — 5:05 PM

Capitalism vs. Communism

capitalism vs socialism

*at a deserted fast food restaurant*

 

“Uh hi can I get a burger and fries?”

*mumbled response*

“Ummmm…yeah” *hands credit card*

*swipes card, mumbles, and returns card*

“Thanks.” *Examines the disgusting restaurant while waiting*

*Stands at grill unresponsively*

*Looks at employee confusedly* “Is everything alright?”

*mumbles response*

“Ummmm if youre not going to make the burger I can go somewhere else it’s just that I kind of paid already you know?”

*mumbles response*

“Is that a ‘no’…?”

“WHY DONT YOU MIND YOUR OWN BUSINESS IM MAKING YOUR STUPID BURGER AS FAST AS I CAN.”

“Oh, I’m sorry I didn’t mean to make you angry it’s just that I’m in a bit of a rush.”

“Oh I’m sorry, your life must be really hard, right mr. rich businessman?”

*laughs* “Hey man I dont want to get into an argument here, I’m just trying to get a burger.”

“Yeah, I’m sure you are. I’m sure you would like to leave me to clean up after you after I so GENEROUSLY make your burger for you as fast as I possibly can and with no mistakes. You would probably love that, wouldnt you?”

“Uhhh, yeah, that would actually be great.” *laughs*

*sneers* “Yeah well keep dreaming Mr. rich man because this is MY burger joint and what I say goes.”

“So youre not going to make my burger then?”

“Does it look like I’m not going to make your burger?”

“I dont know, but like I said I’m in a bit of a rush.”

“Listen man, do you think it’s easy making these burgers?”

“What?”

“I said: do you think it’s easy to make these burgers?”

“Uhhhh well I’m not really sure, I’ve never worked in a place like this you know?”

“I bet you think you could do it.”

“I mean, probably. Why? Do you think I couldnt?”

“I dont think you would last a single day behind this grill.”

*laughs* “alright buddy, whatever you say. Can I have my burger now?”

“No! I want you to admit that you couldnt do my job.”

“If I say I couldnt do your job will you give me my burger?”

“That depends on how you say it.”

“Uhhh, ok?”

“You have to mean it, otherwise it doesnt count.”

“I have to mean it?”

“Yeah, you cant just say it but not mean it. That wouldnt count.”

“But how can I mean it when I know for a fact that I could, with almost no effort whatsoever, do an infinitely better job than you are doing right now?”

“What? You think you could do my job???”

“Are you serious?”

“What do you mean? Of course I’m serious.”

“Oh.” *laughs* “Well then yes, I think I could do your job.”

“….”

“Are you going to make my burger now?”

“Fuck you. We’re closed”

“….Right. Guess I’ll go somewhere else then. Thanks for all your help.”

“Fuck off.”

by : YourLocalRabbi

 

Updated: March 23, 2016 — 5:04 PM
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