Schlage 9691T MIFARE Classic Multi-Technology Keyfob — 125 kHz + 13.56 MHz for Chicago Migration Projects

Schlage 9691T MIFARE Classic Multi-Technology Keyfob

The Schlage 9691T is the multi-technology version of the 9651T — combines 125 kHz proximity AND 13.56 MHz MIFARE Classic 1K in one keyfob so the same credential works on both legacy and current-generation readers simultaneously. The Chicago choice for Schlage / Allegion phased Prox-to-Smart migration projects, where Vidimost can issue 9691T fobs and let the reader infrastructure migrate at its own pace.

What’s Confirmed by the Official Schlage / Allegion Spec

These specifications come from Allegion’s published 9691T documentation:

• Frequencies: 125 kHz proximity AND 13.56 MHz contactless smart card — both in the same keyfob
• Smart standard: MIFARE Classic 1K
• Smart memory: 1K byte / 8K bit
• Form factor: ISO thin multi-technology keyfob
• Bit formats: 26-bit, 32-bit, 34-bit, 35-bit, 36-bit, 37-bit, 40-bit, 48-bit
• Ordering note (per Allegion): “When ordering MIFARE/proximity multi-technology credentials, you will need to provide the facility code (excluding 32-Bit and 37-Bit) and a unique start serial number (excluding 35-Bit) to be programmed for both the proximity and smart card formats.”
• Security on the smart side: Mutually authenticated communication; encrypted data transfer

Why Phased Prox-to-Smart Migration Is the Right Project Pattern

For most Chicago commercial properties already running 125 kHz HID Prox infrastructure, jumping directly to a 13.56 MHz smart-card-only system is operationally disruptive — you can’t replace 200 readers across a multi-building property in one weekend. The phased approach uses:

1. 9691T multi-technology keyfobs for new credentials issued to staff. These work on legacy Prox readers AND on new MIFARE / multi-tech readers the same day.
2. Multi-technology readers (e.g., HID multiCLASS SE RP40, or Schlage MT-series multi-tech readers) installed at high-priority openings — sensitive doors, new construction, public-facing entries.
3. Existing Prox readers kept in service at low-priority openings until the natural reader-replacement cycle.

Over 18–36 months, the property’s reader fleet rolls over to all-smart, the legacy 125 kHz population ages out as fobs are replaced, and the security migration completes without operational disruption.

9691T vs. 9651T

Feature	9691T (this page, multi-tech)	9651T (single-tech)
Technology	125 kHz Prox + 13.56 MHz MIFARE Classic	13.56 MHz MIFARE Classic only
MIFARE memory	1K byte / 8K bit	1K byte / 8K bit
Best fit	Phased Prox-to-Smart migration projects	Properties already standardized on 13.56 MHz only
Cost	Higher (2 chips)	Lower (1 chip)

Schlage Keyfob Family Comparison

Schlage offers four keyfobs Vidimost installs in Chicago:

Keyfob	Technology	Best Fit
9651T	MIFARE Classic 1K (single-tech)	Schlage smart-card-standardized properties
9691T (this page)	125 kHz Prox + MIFARE Classic	Phased Prox-to-Smart migration
8643T	DESFire EV3 multi-tech	Higher-security migrations
8843T	MIFARE DESFire EV3 multi-tech	Premium high-security

Where the Schlage 9691T Wins in Chicago

• Chicago commercial properties undergoing a phased Prox-to-Smart credential migration
• Multi-tenant residential buildings replacing legacy HID Prox with Schlage MIFARE smart credentials
• Property management portfolios with mixed Prox and smart-card reader populations
• Education facility migration projects (legacy Prox + new Schlage MT-series readers)
• Healthcare clinics transitioning from Prox to Schlage smart-card infrastructure
• Hospitality back-of-house migration projects
• Government / municipal facility credential modernization
• Industrial / warehouse properties standardizing on Schlage during multi-year migration
• Banking back-office migration to MIFARE smart credentials
• Retail multi-location properties with phased smart-card rollout

Local Chicago Coverage

Vidimost installs and supplies the Schlage 9691T across the full Chicago metropolitan area for phased Prox-to-Smart migration projects.

Recommended Pairings

• Schlage 9651T — single-tech smart-only sibling for properties past the migration
• Schlage 8643T and 8843T — DESFire EV3 alternatives for higher-security tiers
• Schlage MT15 / MTB15 — Schlage multi-tech readers that work with both 125 kHz Prox and MIFARE 13.56 MHz from the same 9691T fob
• HID 1346 ProxKey III — legacy 125 kHz Prox keyfob for installed-base maintenance during migration

Professional Installation by Vidimost

Vidimost LLC supplies the Schlage 9691T across Chicago for phased credential migration projects. Full-scope service includes site walkthrough, current-state assessment of the 125 kHz Prox installed base, target-state mapping of the smart-card future state, bit-format and facility-code coordination across both technologies (per Allegion’s ordering rules), credential programming or pre-encoding service, and phased deployment over the migration timeline. Contact us for a free site walkthrough and quote.