outbound caller ID options on desk phones
multiple different outbound caller ID options via presence on desk phones
should be able to set specific numbers on each presence keys for outbound calls on just one phone.

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Mike commented
We have multiple office and multiple lines. My phone.com service allowed to have two lines on the desktop phone and I could call out from either. I'm really surprised that RC doesn't allow this feature. Phone.com is much less-featured than RC so why not a second line?
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Robert commented
Not having to use a desktop app, when one already has 12 screens open is critical. I would appreciate the opportunity to be able to just push (line 2) when I dial out from a one particular line.....with line one being my primary my clients know.
I can't believe this is not an option. Even if I needed to get a different phone for this service it would easily be worth it.