单项选择题
A.line timing B.loop timing C.internal timing D.through timing E.external timing
You are provisioning a DS-1 circuit on an ONS 15454 2F-...
单项选择题You are provisioning a DS-1 circuit on an ONS 15454 2F-BLSR with a XC-10G card. Each VT1.5 connection must also terminate via the STS matrix. On the originating circuit node, how many STS ports are now available for VT1.5 circuits?（）
A.2 B.3 C.4 D.20 E.22 F.24
A customer has 2 DS1s to add between adjacent nodes in ...
单项选择题A customer has 2 DS1s to add between adjacent nodes in a UPSR ring. What type of circuit should you recommend?（）
A. VT circuits B. STS circuits C. VT tunnel circuits D. 1:1 protection circuits E. 1:N protection circuits
Click the Exhibit button. Given the information shown i...
Click the Exhibit button. Given the information shown in the exhibit, when creating 2 DS1 circuits, how many STS ports are used on the VT1.5 matrix at Node 1 as VT circuits and how many are used after using VT tunnels?（）
A.2；0 B.3；2 C.3；5 D.4；0 E.6；0 F.6；2
