interface BRI2/1
 no ip address
 isdn switch-type basic-net3
 isdn protocol-emulate network
 isdn tei-negotiation first-call
 isdn incoming-voice voice
 no isdn outgoing display-ie
 isdn skipsend-idverify

Gateway-2(config-if)#do sh isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI2/0 interface
        dsl 0, interface ISDN Switchtype = basic-net3
    Layer 1 Status:
        DEACTIVATED
    Layer 2 Status:
        Layer 2 NOT Activated
    Layer 3 Status:
        0 Active Layer 3 Call(s)
    Active dsl 0 CCBs = 0
    The Free Channel Mask:  0x80000003
 --More--
May 16 15:29:46.735: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on FastEthernet0/0 (not half duplex), with SEP000BBE51541C Port 1 (half duplex).
ISDN BRI2/1 interface
        dsl 1, interface ISDN Switchtype = basic-net3
    Layer 1 Status:
        DEACTIVATED
    Layer 2 Status:
        Layer 2 NOT Activated
    Layer 3 Status:
        0 Active Layer 3 Call(s)
    Active dsl 1 CCBs = 0
    The Free Channel Mask:  0x80000003
    Total Allocated ISDN CCBs = 0

FastEthernet0/0            192.168.120.5   YES NVRAM  up                    up
BRI2/0                     unassigned      YES NVRAM  up                    down
BRI2/0:1                   unassigned      YES unset  down                  down
BRI2/0:2                   unassigned      YES unset  down                  down
BRI2/1                     unassigned      YES NVRAM  down                  down
BRI2/1:1                   unassigned      YES unset  down                  down
BRI2/1:2                   unassigned      YES unset  down                  down
Virtual-Access1            unassigned      YES unset  up                    up