Free Huawei H11-879 Exam Dumps Questions & Answers

The U1900 system is connected to the PSTN through a digital trunk. In U1900, phone A cannot call user B's On mobile phone, user B can call back phone A normally. Which of the following reasons may cause this failure? () (single choice)

• A.  The digital trunk connection between U1900 and PSTN is faulty.
• B.  Phone A outbound call permission restriction
• C.  Phone A is not registered properly.
• D.  Phone A has been added to the system's blacklist of called parties

The human eye is more sensitive to brightness than to color. () Correct or Wrong

• A.  Wrong
• B.  Correct

E1 and 4E1 lines do not support H.460 traversal networking. () Correct or Wrong

• A.  Wrong
• B.  Correct

There are two terminals, T1 and T2, both registered to the same GK. When T1 calls T2 by number, what is wrong with the following statement? () Multiple choice

• A.  The ACF message received by T1 contains the call signaling channel transmission address of T2
• B.  After T2 receives the Setup message, it sends an ARQ message to GK
• C.  The ACF message received by T1 contains the GK call signaling channel transmission address
• D.  After T2 receives the Setup message, it sends an ARQ message to T1

U1900 and the original traditional PBX can be connected through () to protect customers' early investment () (Multiple choice)

• A.  PRA
• B.  H.323
• C.  SIP
• D.  AT0