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- Path: sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!sdd.hp.com!caen!destroyer!news.itd.umich.edu!honey
- From: honey@citi.umich.edu (Peter Honeyman)
- Newsgroups: alt.hackers
- Subject: ping from 30,000 feet
- Date: 14 Nov 1992 02:22:46 GMT
- Organization: Center for Information Technology Integration, Univ of Michigan
- Lines: 55
- Approved: just this once
- Distribution: world
- Message-ID: <1e1ntmINNdb6@terminator.rs.itd.umich.edu>
- References: <3803@creatures.cs.vt.edu>
- Reply-To: honey@citi.umich.edu
- NNTP-Posting-Host: hone.citi.umich.edu
-
- here's a recent hack you might enjoy ...
-
- Date: Fri, 06 Nov 92 15:01:48 EST
- From: peter honeyman <honey@citi.umich.edu>
- To: little-work@citi.umich.edu
- X-Location: Airport lounge, San Jose, CA
- Subject: airfone slip experiences
-
- this message is being composed with mh/comp running in an x11r5/xterm
- on an ibm ps-2 model l40-sx running mach 2.6, on northwest flight 181,
- which departed detroit at 9:30 and is due in san jose at 14:45. it
- will be delivered with smtp as soon as i get a chance, probably when i
- reach tahoe city. [i was able to send it from the san jose airport.]
-
- i brought up slip over gte airfone with a konex koupler model 203
- acoustic coupler and a telebit qblazer running at 300 baud.
-
- the acoustic coupler is a good match for the airfone -- i was able to
- make a very snug coupling. i buried the mated pair under pillows.
-
- the microport 4232 modem was uncooperative, and started complaining
- about a low battery before i was able to establish a connection.
-
- with the qblazer, i was unable to connect to the remote worldblazer at
- high baud rates, but i did get a 300 baud connection going, whereupon i
- brought up slip. here are some representative ping times:
-
- hone:; ping doom
- PING doom.citi.umich.edu (141.211.128.207): 56 data bytes
- 64 bytes from 141.211.128.207: icmp_seq=0. time=46139. ms
- 64 bytes from 141.211.128.207: icmp_seq=1. time=50240. ms
- 64 bytes from 141.211.128.207: icmp_seq=2. time=52320. ms
- 64 bytes from 141.211.128.207: icmp_seq=3. time=55670. ms
- 64 bytes from 141.211.128.207: icmp_seq=4. time=57120. ms
- 64 bytes from 141.211.128.207: icmp_seq=5. time=59330. ms
- 64 bytes from 141.211.128.207: icmp_seq=6. time=63930. ms
- 64 bytes from 141.211.128.207: icmp_seq=8. time=63820. ms
- ^C
- ----doom.citi.umich.edu PING Statistics----
- 75 packets transmitted, 8 packets received, 89% packet loss
- round-trip (ms) min/avg/max = 46139/56071/63930
-
- you get the picture -- 90% packet loss and 60 second round trip times.
- i'm guessing that the packets spent all thayt time in the v.42 layer,
- although i did not see the error correction light flashing.
-
- i tried to get smtp and telnet sessions going, but they timed out.
-
- in summary, it was something of an accomplishment to get slip running
- and packets bouncing from 30,000 feet, but a limited success at best.
-
- peter
-
- ps: i found 117v (the flight exhausted my batteries) and an rj-11 jack
- in the san jose airport, where i have a lengthy layover.
-