<h2>Overview</h2>
<p>The <strong>Vodavi 3031-51 T1/PRI combo card</strong> is a key interface module for Vodavi’s XTS telephone switching systems. This card provides direct T1 and PRI (Primary Rate Interface) connectivity, enabling businesses to integrate high-capacity digital trunks into their phone switching infrastructure. Compatible with both XTS-IP and XTSc-IP systems, this interface card is a proven solution for enterprise communication systems.</p>
<h2>Key Features</h2>
<ul>
<li><strong>24 Channel Capacity:</strong> Adds up to 24 T1 or PRI channels to supported systems</li>
<li><strong>Dual Format Support:</strong> Works with both T1 and ISDN PRI protocols for flexible trunk integration</li>
<li><strong>XTS System Compatibility:</strong> Designed for XTS-IP and XTSc-IP KSUs (XTSc-IP requires Phase Loop Lock unit 3530-40)</li>
<li><strong>Proven Reliability:</strong> Legacy telecom standard used in thousands of business installations</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Part Number:</strong> 3031-51</li>
<li><strong>Channel Count:</strong> 24 T1 or PRI channels</li>
<li><strong>Interface Type:</strong> T1 / ISDN PRI</li>
<li><strong>Supported Systems:</strong> XTS-IP, XTSc-IP</li>
<li><strong>Series:</strong> Vodavi XTS V300</li>
<li><strong>Form Factor:</strong> Interface card module</li>
</ul>
<h2>Typical Applications</h2>
<p>The Vodavi 3031-51 is ideal for:</p>
<ul>
<li>Multi-line business telephone systems requiring T1 trunk integration</li>
<li>ISDN PRI network connections for high-capacity call handling</li>
<li>System upgrades and expansions for existing Vodavi XTS installations</li>
<li>Legacy telecom infrastructure maintenance and modernization</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Vodavi XTS-IP telephone switching system</li>
<li>Vodavi XTSc-IP switching system (with Phase Loop Lock unit 3530-40)</li>
<li>Vodavi XTS series KSU (Key System Unit)</li>
<li>T1 and ISDN PRI network protocols</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<p>Verify compatibility with your system integrator before ordering.</p>
<h3>Works With</h3>
<ul>
<li>T1 digital circuits</li>
<li>ISDN PRI (Primary Rate Interface) trunks</li>
<li>Vodavi telephone switching platforms</li>
</ul>
