[Asterisk-Users] Cisco 7940 and multiple simultaneous calls

[Chris Wade]

Matthew Boehm wrote:
> Dan Levine wrote:
> 
>>Yup that works on our end as well.... We assign 3 of the same lines to
>>the same phone and it works perfectly.
> 
> 
>     Are you are using the same SIP account for each line on the phone? Could
> you please post your 7960's SIP<mac>.cnf file? Asterisk does not support
> multiple registrations of the same SIP account so I am quite interested in
> how both of you are accomplishing this.
> 
> -Matthew

I don't think the Cisco's actually register twice, they register once 
per 'account'.

These phones simply realize that the account information for both lines 
is the same and assumes (possibly incorrectly) that it should accept 
calls to that 'account' on all lines with that account.

This disables the phones ability to handle two incoming calls per line 
button however.

My work-around, and I'm sure many others too, was to create a -a and -b 
'account' for each 'account' and then do dialplan rollover to make the 
7940 accept two calls per line button, or 4 simultaneous incoming calls. 
  The 7960 could accept 12 simultaneous incoming calls this way using a 
-a through a -f 'account'.

-Chris

PS: Haven't checked this, but the phone may actually register per 'line' 
meaning it would register multiple times, but since ALL the details of 
the register are the same, * just treats it as a re-register and neither 
* nor the phone know the difference, so both 'work together' to produce 
this effect.