[asterisk-users] Problem with Cisco7970 SIP load / call transfer

[Juha Suhonen]

Hi!


I'm having an interesting problem with Cisco7970 SIP load (8.0(2)SR1) - 
the phone seems to work otherwise fine, but I can't do an assisted 
transfer (and the 7970 phone also doesn't seem to support the BlindXFer 
option that previous models have had). Phones are connected to Asterisk 
1.2.10.


What happens is this: User a calls to my phone. I press "Transfer" on the 
phone, I then place another call to another extension. When this new call 
is connected, pressing the "Transfer" -button again sends 2 SIP INVITE 
messages (and asterisk acks them with seemingly appropriate "OK" 
messages). But.. After getting the acks, phone just says "Unable to 
complete transfer" and both current calls are placed on hold.

Has anybody else seen this? Any ideas on how to fix? The same 
configuration works with Cisco 7960 (using some pretty ancient SIP load). 
I've also thought about upgrading the phone to 8.0(3) release of the SIP 
load, but atleast voip-info.org wiki states it as a "total disaster" - can 
anybody confirm if it's really a disaster?


As a related note, I'm also not seeing MWI with the 7970 phone - when 
Asterisk sends the MWI status message to phone, Asterisk immediatetly 
barfs out -- Got SIP response 400 "Bad Request" back from xxx. Does 
anybody know if this is a bug on the phone and maybe fixed on a later 
image? (and is there any workaround I can enable on asterisk to overcome 
this)


Also, a small UI thing - has anybody found a way to get the # -key to 
directly dial the number which has been inputted and mimic the behaviour 
7960s had? Our users are accustomed to keying in 123# instead of pressing 
123 + "dial"..




 	-- juhas