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It sounds like you were on the top end of call centre tolerability there mate. You had an office people could reach by phone, not a department full of people plugged in their pods like battery hens.
Generally I've found inbound (tech support, customer service, etc) is always more pleasant than outbound (sales, charity pestering, scamming). Outbound is where you really have no freedom or independence in your work whatsoever. Most inbound gigs aren't much different, you just get dropped into a conversation with a stranger, but there's at least more variety.
If you're on the kind of inbound line where you actually get a choice to answer it or not, you have struck gold, in call centre terms.