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<title>Tech Info - ISDN Timers</title>

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<h1>Tech Info - ISDN Timers</h1>
<p>The following timers are defined by the ITU for use with ISDN.</p>
<table align="center" summary="" border="1" cellspacing="0" cellpadding="4" align="center" class="p-m-s">
  <tr valign="top" class="g-h-s">
    <td width="50">Name</td>
		<td width="150">Started</td>
		<td width="150">Stopped</td>
		<td width="50">Value</td>
    <td>Notes</td>
  </tr>
	<tr valign="top">
    <td>T301</td>
		<td>ALERT</td>
		<td>CONNECT</td>
		<td>-</td>
    <td>-</td>
  </tr>
   <tr valign="top">
    <td>T302</td>
		<td>SETUP</td>
		<td>SETUP_ACK</td>
		<td>-</td>
    <td>Overlapped sending only</td>
  </tr> 
	<tr valign="top">
    <td>T303</td>
		<td>SETUP</td>
		<td>CALL_PROC</td>
		<td>-</td>
    <td>-</td>
  </tr> 
	<tr valign="top">
    <td>T304</td>
		<td>SETUP</td>
		<td>SETUP_ACK</td>
		<td>-</td>
    <td>-</td>
  </tr>
	<tr valign="top">
    <td>T305</td>
		<td>DISC</td>
		<td>RELEASE</td>
		<td>-</td>
    <td>-</td>
  </tr> 
	<tr valign="top">
    <td>T306</td>
		<td>-</td>
		<td>-</td>
		<td>-</td>
    <td>-</td>
  </tr> 
	<tr valign="top">
    <td>T308</td>
		<td>RELEASE</td>
		<td>REL_COM</td>
		<td>-</td>
    <td>-</td>
  </tr> 
	<tr valign="top">
    <td>T309</td>
		<td>-</td>
		<td>-</td>
		<td>-</td>
    <td>How long to keep B channels when D channel goes down.</td>
  </tr> 
	<tr valign="top">
    <td>T310</td>
		<td>CALL_PROC</td>
		<td>ALERT/CONNECT</td>
		<td>-</td>
    <td>-</td>
  </tr>
	<tr valign="top">
    <td>T314</td>
		<td>-</td>
		<td>-</td>
		<td>-</td>
    <td>Segmentation</td>
  </tr>  
	<tr valign="top">
    <td>T316</td>
		<td>RESTART</td>
		<td>RESTART_ACK/REJ</td>
		<td>-</td>
    <td>-</td>
  </tr> 
	<tr valign="top">
    <td>T317</td>
		<td>-</td>
		<td>-</td>
		<td>-</td>
    <td>-</td>
  </tr> 
	<tr valign="top">
    <td>T318</td>
		<td>RESUME</td>
		<td>RESUME_ACK/REJ</td>
		<td>-</td>
    <td>-</td>
  </tr> 
	<tr valign="top">
    <td>T319</td>
		<td>SUSPEND</td>
		<td>SUSPEND_ACK/REJ</td>
		<td>-</td>
    <td>-</td>
  </tr> 
	<tr valign="top">
    <td>T321</td>
		<td>-</td>
		<td>-</td>
		<td>-</td>
    <td>D channel failure to restart attempts</td>
  </tr> 
	<tr valign="top">
    <td>T316</td>
		<td>STATUS</td>
		<td>DISC/REL/REL_COM</td>
		<td>-</td>
    <td>-</td>
  </tr> 
</table>
<hr />
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<a title="quick overview 'cos we always forget - not that we ever knew much - now includes a nifty tester" href="http://www.zytrax.com/tech/web/regex.htm">regex stuff</a><br />
<a href="http://www.zytrax.com/tech/rfcs/">rfc stuff</a><br />
<a title="TCP/IP, ISDN, LAN, VoIP, ITU Multi-Media" href="http://www.zytrax.com/tech/protocols/">protocol stuff</a><br />
<a title="PC Parallel Ports, LAN wiring, RS232, Centronics, DIN" href="http://www.zytrax.com/tech/layer_1/">cable stuff</a><br />
<a href="http://www.zytrax.com/tech/layer_1/cables/tech_lan.htm">lan wiring</a><br />
<a title="DB9, DB25 pinouts, RJ45 serial, RS standards" href="http://www.zytrax.com/tech/layer_1/cables/tech_rs232.htm">rs232 wiring</a><br />
<a title="A collection of detailed howtos including Samba3 as PDC, FreeBSD firewalls" href="http://www.zytrax.com/tech/howtos/">howto stuff</a><br />
<a title="A collection of survival guides - quick overviews - to popular software" href="http://www.zytrax.com/tech/survival/">survival stuff</a><br />
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<a href="http://www.zytrax.com/tech/codes.htm">ascii  codes</a><br />
<a href="http://www.zytrax.com/tech/data_rates.htm">data rate stuff</a><br />
<a href="http://www.zytrax.com/tech/telephony/">telephony stuff</a><br />
<a href="http://www.zytrax.com/tech/mech/">mechanical stuff</a><br />
<a href="http://www.zytrax.com/tech/pc/">pc stuff</a><br />
<a href="http://www.zytrax.com/tech/electronics/">electronic stuff</a><br />
<a href="http://www.zytrax.com/links">tech links</a><br />
<a href="http://www.zytrax.com/books">open guides</a><br />
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<h2>Standards</h2>
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<a href="http://www.iso.org" target="_blank" class="t-db">ISO (International)</a><br />
<a href="http://www.ansi.org" target="_blank" class="t-db">ANSI (US)</a><br />
<a href="http://www.en.din.de/" target="_blank" class="t-db">DIN (Germany)</a><br />
<a href="http://www.etsi.org/" target="_blank" class="t-db">ETSI (EU)</a><br />
<a href="http://www.bsi-global.com/index.xalter" target="_blank" class="t-db">BSI (UK)</a><br />
<a href="http://www.afnor.fr/portail.asp?Lang=English" target="_blank" class="t-db">AFNOR (France)</a><br />
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<h4>Telecom</h4>
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<a href="http://www.tiaonline.org" title="RS232 etc" target="_blank" class="t-db">TIA (US)</a><br />
<a href="http://www.eia.org" target="_blank" class="t-db">EIA (US)</a><br />
<a href="http://www.itu.int" target="_blank" class="t-db">ITU (International)</a><br />
<a href="http://www.ieee.org" target="_blank" class="t-db">IEEE (US)</a><br />
<a href="http://www.etsi.org/" target="_blank" class="t-db">ETSI (EU)</a><br />
<a href="http://www.oftel.gov.uk/" target="_blank" class="t-db">OFTEL (UK)</a><br />
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<a href="http://www.ietf.org/" target="_blank" class="t-db">IETF</a><br />
<a href="http://www.ietf.org/rfc.html" target="_blank" class="t-db">IETF-RFCs</a><br />
<a href="http://www.iana.org/" target="_blank" class="t-db">IANA</a><br />
<a href="http://www.icann.org/" target="_blank" class="t-db">ICANN</a><br />
<a href="http://www.w3c.org/" target="_blank" class="t-db">W3C</a><br />
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<h4>Electronics</h4>
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<a href="http://www.jedec.org" title="chip pacakaging, testing etc." target="_blank" class="t-db">JEDEC</a><br />
<a href="http://www.eia.org" target="_blank" class="t-db">EIA (US)</a><br />
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