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Cisco Bug: CSCtb74772 - 9.7(3)S22P22 ISDN backhaul channels hung

Last Modified

Feb 22, 2014

Products (1)

  • Applications for Cisco Unified Application Environment

Known Affected Releases


Description (partial)

 ISDN backhaul channels hung

on PGW, make call from PRI to ISUP;
1, After the call is setup, PGW sends out RQNT to gateway; 
2, before PGW receives the response for RQNT from gateway, it receives the REL
from ISUP, so PGW sends DLCX to gateway;
3, gateway responds 400(for RQNT), 250 (for DLCX);
4, pgw will hang the call once receives 400 from gateway.
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