[Serusers] Can SER do it? Extract info

[Gustavo Passos Tourinho]

Hi There.

Can SER extract info from request uri? For example, If I have this uri:

INVITE sip:123456#0159559432 at my.sip.domain

How can I get data before "#" (123456)? I dont want to "strip" this 
information, just want to get it for further utilization.

Is that possible? If it can be done, can be done using variable number 
of digits? For example:
INVITE sip:123#0159559432 at my.sip.domain
INVITE sip:1234567#0159559432 at my.sip.domain

Thanks in advanced.
Regards,
Gustavo