Cisco PRI connecting to NEC PBX.

This is want I need to setup.

Telco provider < Sip trunk > Cisco 5350 < PRI > Nec phone switch.

Here is my config for the PRI link. "protocol-emulate-network" is required when there is no service provider clocking the PRI.

controller T1 1/0
 framing esf
 linecode b8zs
 pri-group timeslots 1-24

!
interface Serial1/0:23
 no ip address
 encapsulation hdlc
 isdn switch-type primary-ni
 isdn protocol-emulate network
 isdn incoming-voice modem
 no cdp enable

These commands were also helpful.

show controller T1 ( Look for the T1 to be up with no errors.)
show isdn status ( Look for the lines below, especially MULTIPLE_FRAME_ESTABLISHED.)
debug isdn q921

#sh isdn status
ISDN Serial1/0:23 interface
******* Network side configuration ******* 
dsl 0, interface ISDN Switchtype = primary-ni
    Layer 1 Status:
ACTIVE
    Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
    Layer 3 Status:
0 Active Layer 3 Call(s)