[cisco-voip] Group Pickup of SIP device is taking about 10 seconds to transfer to the user

[Robert Kulagowski]

We have multicast speakers which can also register as a 3rd party SIP 
device.  They're configured to register with CM 7.1(3) as DN *71.  The 
receptionist forwards the main number to *71 and the speakers act as 
overhead bells.

They are in pickup group 111.  When users dial GPickup 111, it takes about 
10 seconds after pressing "111" before the call gets transferred to the 
person that did the dial.  When we had analog bells on an ATA using SCCP 
the delay wasn't so extreme.

Is there some way to shorten this time?  Is this something inherent in how 
SIP does things that's causing the delay?

It shouldn't be any sort of interdigit delay, is it?  A route plan report 
doesn't show that there are any DNs or anything else similar which could be 
causing a digit delay as far as I can see.