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Don't Pick Up: Missed calls in India

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Re: Don't Pick Up: Missed calls in India

#41

Missed calls still signal a lot in this day and age. One example: you send a couple serious texts to a close friend or partner after an argument. They stay unread and you get no response. You then call and see if they pick up after a few rings. If not you hang up and wait or maybe write it off. If the other person is there (and often you know they are there monitoring their phone) maybe now they respond (via txt or c…

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Re: Don't Pick Up: Missed calls in India

#42

I wrote a "ring knocking" tool back in my college days so that I could connect to my Linux box at home from the labs at school since I was on dial-up. I'd go to the payphone, put in a quarter, call my line and let it ring the requisite number of times, hang up, get my quarter back, then go to the lab and check my school email account. The ringconnectd daemon would detect the rings, wait a few seconds, connect to my I…

I tried to do something similar not too long ago. Different application really, but I wanted to do something on the other end depending on how often it rang. Sadly I discovered that apparently in all-digital "modern" phone networks (SIP, VoIP etc.) the ringing tone you hear as a caller is simply ingested by your network operator and the tone you hear as the one getting called is basically just some audio file that plays over and over, triggered by a single "hey, someone is calling now!"-message sent by a modem unit, which to my surprise are still using AT commands to this day. Bummer. Turns out even the duration of how long it rings depends on too many factors, so what you hear on one end (ringing) might be off by multiple seconds on the other end.

At least it explains the "You only heard it ring once? I let it ring like five times before I hung up! Seriously!"-anecdotes I keep picking up. :)

Re: Don't Pick Up: Missed calls in India

#44
post #43

I remember one mobile operator in late 2000s charged for a call only after first second. So we used to call each other, saying something really fast and hang up to not get charged.

When I was a teenager I used this to attempt to long distance date someone... got banned from the network.

Re: Don't Pick Up: Missed calls in India

#45
Reminds me of childhood. We'd do this when we didn't have enough balance. Expecting the reciever to call back. This would work only within the state. Out of state we used to have something called roaming charges. Charged even when receiving a call. We don't have that anymore these days.

Re: Don't Pick Up: Missed calls in India

#46

Long before cell phones and answering machines my Dad was a pharmacist in a small town. He was happy to drive down to the drugstore when a customer called our home needing an after-hours refill, except on Sunday which was his recharge day. On Sundays we were instructed never to answer the phone unless it rang twice, paused, then rang again. Close family members knew the secret code; customers just learned Dad wasn't…

My (now retired) pharmacist said he got a call on Christmas Day because someone got someone a surprise travel holiday that left the next day and they didn’t have enough meds to be away that long.

He doesn’t believe they realized he was half in the bag filling their prescriptions.

Re: Don't Pick Up: Missed calls in India

#47
post #5

I remember doing this when I was a kid. We also had an understanding of the number of based on the number of rings, too: 1 ring and hang up was when my aunt got home and 2 rings was my cousin got home. They could call us long distance to let us know they got home OK.

I did this with my grandpa. Course, sometimes I would let it go for one ring too many and then he would call back because he was worried. :)

Re: Don't Pick Up: Missed calls in India

#48
It’s also used by receiving parties that don’t want to accept calls but need a signal and/or those with toll free numbers that may receive numerous calls — voting on some competition shows uses this mechanism. Some campaigns have also used this to collect the number of people “signing a petition”.

Re: Don't Pick Up: Missed calls in India

#49
I used Google calendar to send free SMS to myself with information about my services running on my raspberry pi. Each service had a future calendar entry with SMS reminder. Under normal operation the service would move the entry forward in time. If it had crashed, I got a SMS.
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