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Cisco Bug: CSCum09990 - T38 fax call fails on MGCP gateway with T1/cas endpoints.

Last Modified

Apr 24, 2020

Products (81)

  • Cisco IOS
  • Cisco VG204XM Analog Voice Gateway
  • Cisco C897VA Integrated Services Router
  • Cisco C892FSP Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 886VAG 3G Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 2951 Integrated Services Router
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Known Affected Releases

15.3(3)M1.9 15.4(1)T1 15.4(1.14)T 15.4(1.24)T0.1 15.4(2.2)T 15.4(2.20)T

Description (partial)

Basic  mgcp t38-fax call fails between T1/cas endpoints as call not getting  confirmed at terminating end.

2900 routers has been booted with Cisco IOS Release 15.4(1.14)T images.

Related Community Discussions

MGCP GW で T.38 fax-relay によるFAX通信に失敗する
2015年9月16日(初版) TAC SR Collection 主な問題 MGCP でコントロールされた Voice GW上で、T.38 fax-relayを設定してFAX通信を行った場合、T.30 DCS 信号が着信側Voice GW から送出されず、FAX通信に失敗するという問題です。 この問題に該当する場合、着信側 Voice GW上で debug fax relay t30 all-leve-1 を有効にすると、「fr-msg-tx」に続く出力がブランクとなります。 着信側 Voice GW の出力例 (DCS を 未送信) timestamp=13782521 fr-msg-det DIS timestamp=13785121 fr-msg-tx timestamp=13786821 fr-msg-tx 同時間帯の発信側 Voice GW の出力例 (DCS を 受信) timestamp=1391383 fr-msg-tx DIS timestamp=1393733 fr-msg-det DCS timestamp=1402703 fr-msg-det DCS 参考 : ...
Latest activity: Sep 16, 2015
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