Digium TE133F T1/E1/PRI PCI Express x1 Card with Echo Cancellation

This is a complete HTML document for a product page. It presents the Digium TE133F telephony card with a clean, professional layout. The page includes Schema.org markup for product data, a structured specifications table, a feature list, and an FAQ section, all styled for clear readability.
“`html

* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
background: #f4f7fc;
font-family: ‘Inter’, -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif;
padding: 40px 20px;
display: flex;
justify-content: center;
color: #1e293b;
}
.product-card {
max-width: 1100px;
width: 100%;
background: white;
border-radius: 32px;
box-shadow: 0 20px 40px -12px rgba(0, 20, 30, 0.25);
padding: 32px 36px;
transition: all 0.2s ease;
}
/* image gallery – slider adapted from original snippet */
.gallery-wrapper {
width: 100%;
max-width: 600px;
margin: 0 auto 28px auto;
position: relative;
border-radius: 24px;
overflow: hidden;
box-shadow: 0 8px 18px -6px rgba(0,0,0,0.15);
background: #f0f4fa;
}
.slider {
width: 100%;
position: relative;
padding-top: 75%; /* 4:3 ratio */
background: #eef2f7;
}
.slider img {
position: absolute;
left: 0; top: 0;
width: 100%;
height: 100%;
object-fit: contain;
transition: opacity 0.4s ease;
background: white;
padding: 12px;
}
.slider input[type=”radio”] {
display: none;
}
.slider label {
cursor: pointer;
position: absolute;
bottom: 16px;
width: 14px;
height: 14px;
background: rgba(0,0,0,0.2);
border-radius: 50%;
z-index: