10, 7, or 4 From The Telco

How can you tell how many digits the Telco is sending in to your voice gateway?  Here on our Cisco router, acting as an H323 gateway with a PRI attached, I ran the 'debug isdn q931' command.  I placed a call with a cell phone and found that 4 digits are coming in from the Telco.  See the 2951?  I dialed 205-555-2951.  Only 2951 came in.

2821#
*Jul 22 14:51:11.634 CDT: ISDN Se0/0/0:23 Q931: RX <- SETUP pd = 8  callref = 0x0212
        Bearer Capability i = 0x8090A2
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98385
                Exclusive, Channel 5
        Facility i = 0x9F8B0100A10F02010106072A8648CE1500040A0100
        Progress Ind i = 0x8283 - Origination address is non-ISDN
        Calling Party Number i = 0x2183, '2055678989'
                Plan:ISDN, Type:National
        Called Party Number i = 0x80, '2951'
                Plan:Unknown, Type:Unknown
*Jul 22 14:51:11.658 CDT: ISDN Se0/0/0:23 Q931: TX -> CALL_PROC pd = 8  callref = 0x8212
        Channel ID i = 0xA98385
                Exclusive, Channel 5
2821#