1. Extension 6515, please.
请给我接分机6515。
还能这样说：
Put me through 6515, please.
Give me extension 6515, please.
2. How may I direct your call?
您要转接哪里？
还能这样说：
Who would I divert your call?
How should I re-route your phone call?
应用解析：
direct at/direct against 把……对准；
direct to 把（注意力、精力）贯注在；指引方向；把……指向；把……寄给
3. May I have Jin Ming Hotel?
请给我接金明旅馆好吗？
还能这样说：
Connect me with Jin Ming Hotel, please.
Could you get me transferred to Jin Ming Hotel?
应用解析：
hotelier/hotelkeeper/hotelman 旅馆经理或老板
4. The number is busy now.
电话占线。
还能这样说：
I'm sorry the number's engaged.
The line isn't free now.
应用解析：
one's (lucky) number comes up 走运；
one's days are numbered 活不久了，寿命不长了