Cisco 800 Series Routers

Field Notice: Cisco 827 May Require ADSL Crossover Cable

August 18, 2000

Products Affected

  • CISCO827-4V

  • CISCO827  

Problem Description

The Cisco 827 Router and the Cisco 827-4V Router ship with an ADSL straight-thru cable. Depending on how their ADSL cable was provisioned, some customers might need an ADSL crossover cable.  


The ADSL straight-thru cable ships with the Cisco 827 and the Cisco 827-4V. The straight-thru cable maps pins 3 & 4 on the router's side to pins 3 & 4 on the ADSL wall jack. The crossover cable maps pins 3 & 4 on the router's side to pins 2 & 5 on the ADSL wall jack.  

Problem Symptoms

The Cisco 827 and the Cisco 827-4V will not train to the ADSL circuit. It is possible that your ISP/Telco has provisioned your ADSL circuit on RJ-11 pins 2 and 5, not pins 3 and 4.  


Customers may build a crossover cable by following the diagram ( or complete the upgrade to receive an ADSL crossover cable. This cable crosses RJ11 pins 2 and 5 to RJ11 pins 3 and 4.

Upgrade Program

CISCO827 Crossover cable exchange

If you have any questions concerning the upgrade program, e-mail

Note: Fields marked with an asterisk (*) are required fields.

Company Information
*ZIP/Postal Code
Product *Quantity
Contact Information
*First Name
*Last Name
*Phone 1 Ext.
Fax 1 Ext.
*Internet E-Mail
Please use the following format:
*Upgrade Order Reference Number
Please provide a number that you can use when inquiring about order status
*Serial Numbers of Affected Units 2
1 For phone and fax, include 011 and the country code outside North America.

2 When entering more than one serial number in the serial number text entry field, type a comma between each serial number to separate them.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) at (800) 553-24HR, (408) 526-7209, or send e-mail to