PSTN Router Config

[anis_cisco]

hi,
 
im trying to config  T1 in PSTN router which is back to back connected to a router, but did not succedd , here is the error 
msg im getting when i debug isdn q931 on PSTN & HQ Router :

HQ#BAD FRAME()BAD FRAME()BAD FRAME()BAD FRAME()
*Dec 11 08:01:07.187: ISDN Se0/0/0:23 Q931: Ux_DLRelInd: DL_REL_IND received fro
m L2
BAD FRAME()BAD FRAME()BAD FRAME()BAD FRAME()

*Dec 11 08:01:16.187: ISDN Se0/0/0:23 Q931: Ux_DLRelInd: DL_REL_IND received fro
m L2
BAD FRAME()BAD FRAME()BAD FRAME()BAD FRAME()

show isdn status on both the rotuters are same:

HQ#sh isdn status

Global ISDN Switchtype = primary-4ess
ISDN Serial0/0/0:23 interface
        dsl 0, interface ISDN Switchtype = primary-4ess
    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
    Layer 3 Status:
        0 Active Layer 3 Call(s)
    Active dsl 0 CCBs = 0
    The Free Channel Mask:  0x8000FFFF
    Number of L2 Discards = 0, L2 Session ID = 66
    Total Allocated ISDN CCBs = 0
HQ#
HQ#
HQ#
HQ#sh isdn status
Global ISDN Switchtype = primary-4ess
ISDN Serial0/0/0:23 interface
        dsl 0, interface ISDN Switchtype = primary-4ess
    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = AWAITING_ESTABLISHMENT
    Layer 3 Status:
        0 Active Layer 3 Call(s)
    Active dsl 0 CCBs = 0
    The Free Channel Mask:  0x8000FFFF
    Number of L2 Discards = 0, L2 Session ID = 69
    Total Allocated ISDN CCBs = 0
HQ#
HQ#

attached are the HQ & PSTN Router Config !!!

This is my first time back to back router connectivity.
Can any body suggest please ??
Regards

[Ayodeji Okanlawon]

You need to have one end providing clock and serving as the network side.

Eg on your PSTN router you will have

int s0/1/0:23

clock source internal

isdn protocol-emulate network

[anis_cisco]

Hi Aokanlawon,

Thanks for your help it worked with your suggestion.

Regards,

[Ayodeji Okanlawon · Accepted solution]

glad it worked. dont forget tor rate useful posts