hack-faq-c.html
c036273a4e07683624d3eecbd3b9fdce<!doctype html public "-//W3C//DTD HTML 3.2 Final//EN">
<html>
<head>
<title>The alt.2600/#hack FAQ (Section C: Cellular)</title>
</head>
<body>
<! This document was written by Will Spencer and John Gotts. >
<center> <h1>Section C: Cellular</h1> </center>
<h2>Table of Contents</h2>
<ol> <li> <a href="#c01"><strong>What is an MTSO?</strong></a>
<li> <a href="#c02"><strong>What is a NAM?</strong></a>
<li> <a href="#c03"><strong>What is an ESN?</strong></a>
<li> <a href="#c04"><strong>What is an MIN?</strong></a>
<li> <a href="#c05"><strong>What is a SCM?</strong></a>
<li> <a href="#c06"><strong>What is a SIDH?</strong></a>
<li> <a href="#c07"><strong>What are the forward/reverse channels?</strong></a> </ol>
<p>
(<em>Italic</em> indicates updated questions, while <strong>bold</strong>
indicates new questions.)
</p> <p> </p> <hr> <p>
<a name="c01">1. What is an MTSO?</a>
</p> <p>
MTSO stands for Mobile Telephone Switching Office. The MTSO is the
switching office that connects all of the individual cell towers to the
Central Office (CO).
</p> <p>
The MTSO is responsible for monitoring the relative signal strength of
your cellular phone as reported by each of the cell towers, and
switching your conversation to the cell tower which will give you the
best possible reception.
</p> <p> </p> <hr> <p>
<a name="c02">2. What is a NAM?</a>
</p> <p>
NAM stands for Number Assignment Module. The NAM is the EPROM that
holds information such as the MIN and SIDH. Cellular fraud is committed
by modifying the information stored in this component.
</p> <p> </p> <hr> <p>
<a name="c03">3. What is an ESN?</a>
</p> <p>
ESN stands for Electronic Serial Number. The is the serial number of
your cellular telephone.
</p> <p> </p> <hr> <p>
<a name="c04">4. What is an MIN?</a>
</p> <p>
MIN stands for Mobile Identification Number. This is the phone number
of the cellular telephone.
</p> <p> </p> <hr> <p>
<a name="c05">5. What is a SCM?</a>
</p> <p>
SCM stands for Station Class Mark. The SCM is a 4 bit number which
holds three different pieces of information. Your cellular telephone
transmits this information (and more) to the cell tower. Bit 1 of the
SCM tells the cell tower whether your cellphone uses the older 666
channel cellular system, or the newer 832 channel cellular system. The
expansion to 832 channels occured in 1988. Bit 2 tells the cellular
system whether your cellular telephone is a mobile unit or a voice
activated cellular telephone. Bit's 3 and 4 tell the cell tower what
power your cellular telephone should be transmitting on.
</p> <pre>
Bit 1: 0 == 666 channels
1 == 832 channels
Bit 2: 0 == Mobile cellular telephone
1 == Voice activated cellular telephone
Bit 3/4: 00 == 3.0 watts (Mobiles)
01 == 1.2 watts (Transportables)
10 == .06 watts (Portables)
11 == Reserved for future use
</pre>
<p> </p> <hr> <p>
<a name="c06">6. What is a SIDH?</a>
</p> <p>
SIDH stands for System Identification for Home System. The SIDH in your
cellular telephone tells the cellular system what area your cellular
service originates from. This is used in roaming (making cellular calls
when in an area not served by your cellular provider).
</p> <p>
Every geographical region has two SIDH codes, one for the wireline
carrier and one for the nonwireline carrier. These are the two
companies that are legally allowed to provide cellular telephone service
in that region. The wireline carrier is usually your local telephone
company, while the nonwireline carrier will be another company. The
SIDH for the wireline carrier is always an even number, while the SIDH
for the nonwireline carrier is always an odd number. The wireline
carrier is also known as the Side-B carrier and the non-wireline carrier
is also known as the Side-A carrier.
<p> </p> <hr> <p>
<a name="c07">7. What are the forward/reverse channels?</a>
</p> <p>
Forward channels are the frequencies the cell towers use to talk to your
cellular telephone. Reverse channels are the frequencies your cellular
telephone uses to talk to the cell towers.
</p> <p>
The forward channel is usually 45 mhz above the reverse channel. For
example, if the reverse channel is at 824 mhz, the forward channel would
be at 869 mhz.
</p>
</body>
</html>
© 2012 Packet Storm. All rights reserved.
%7Cutmcsr%3D(direct)%7Cutmcmd%3D(none)){kind=small}
Follow us on Twitter
Follow us on Facebook
Subscribe to an RSS Feed
Comments
No comments yet, be the first!