Phone not ringing with incoming call (missed calls)

[asmithasmith]

Spectralink PTB810 phones

Cisco Aironet 350 APs

I'm having a problem where if a call is present at a handset, the phone doesn't ring to indicate that someone is calling.

This results in the user missing the call. The user can look at the wireless phone and see that a call is present but the phone just doesn't ring. Anybody have any clues about this issue?

[thomas.chen]

Try these links:

http://www.cisco.com/univercd/cc/td/doc/product/wireless/airo_350/accsspts/index.htm

http://www.cisco.com/en/US/products/hw/wireless/ps458/prod_technical_reference_list.html

[KEVIN BUCHANAN]

7920 phones

1242 AP

Call Mgr 4.2

We have a similar problem with missed calls, but the phones DO NOT indicate any call is being attempted.

The caller gets a fast busy.

[migilles]

If is only an intermittent issue, then means the phone has lost the CallManager connection before Ring In message is received by the phone. Want to ensure ARP caching is enabled and DTPC is enabled. Recommend to use version 3.01 for the 7920 and 12.3(8)JEA for autonomous AP or 4.0 for Airespace controller.