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Adapter Cable for Cisco 7900 Series w/Expansion Module

Price: $16.80

359 in stock

Purchasing for business

  • As an authorized reseller of this product, business discounted pricing is only revealed via email as we cannot show it to the general public.
  • Every business order includes unlimited lifetime support from our Headset Helpdesk, saving you time and money.

Adapter Cable for Connecting Plantronics Wireless Headsets & EHS to Cisco 7900 Phones that have a Sidecar Expansion Module

  • If the Cisco phone is equipped with a 7914, 7915, or 7916 expansion module (sidecar), this adapter cable is needed for the EHS to work
  • Plug the Cisco expansion module into the Cisco telephone AUX port, then plug the APC-42 EHS cable (for W700 series) or APC-4 (for CS series) into the expansion module using this adapter.
  • One adapter required per expansion module.
  • Plantronics wireless headset connects to APC-42 – this allows user to have remote call answer/end control
  • 9 inches long
  • Formerly model number 40287-05
BTP Model: PL-85638-01
MFR Part: 85638-01,85S12AA

Additional information

Weight 0.0625 lbs
Dimensions 5.00 × 3.50 × 0.75 in


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User Guide PL-85638-01

Our Unmatched, Value-added Service Saves You Time, Money and Hassles:

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  • Same-day response to emails
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  • Full warranty facilitated by BTP


For customer service, sales inquiries, and technical support, contact us Monday“Friday, 8-5 Pacific Time. (After-hours messages and emails are promptly returned the following business day.)

Call: 800-457-4287 or 425-649-9262

Email: info@btpi.com

Quick ship, standard stock.

This item is normally in stock. Orders received Monday-Friday by 2:30 pm Pacific Time, ship the same day.

If this product is out of stock or on backorder from the manufacturer, a BTP Customer Service Representative will notify you by phone or email with an estimated ship date. If your order includes some in stock products, you may request a partial shipment of in stock item(s) with the out of stock item(s) to follow when available.

BTP does everything possible to eliminate delays and unnecessary expense associated with returns. At least two members of the BTP team will review your order for accuracy. If we have any questions or concerns about your order, such as two incompatible products, we will contact you right away.


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