Your average and basic comms on the S&D server will be like this (From an cynical point of view):

Attackers /w bomb

Bomb Carrier: I'm going to (A or B)

(Others typically follow)

(Sporadic Comms regarding gunfire direction and teamwork)

(Cross Fingers and hope the bomb is planted and blown up)

OR:

Bomb Carrier: (Silence)

Other players: Where are you going?!

(Bomb carrier now rushes into the bomb site and is shot, the briefcase is now out in an open field)

(Repeat your finger crossing)

Defenders:

Player ABC: I'm going A (Note: they don't say their game name to let everyone know who they are)

Player Ikonic: Ikonic is going B.

Player XYZ: (silence, but eventually heads to A)


Now the comms can go one of multiple ways:

________________

Player ABC: OMG THEY'RE ALL GOING A!!!!

(Everyone but Ikonic flocks to A, leaving B exposed or under-defended)

Player XYZ: (Runs into the group of enemy to die)

(The bomb is planted or the defenders/attackers are killed)
____

Ikonic and Player DEF: They're going B

(Player DEF and Ikonic die to attackers)

(No one notices this and the bomb is planted)

Player ABC: OH GOD! They're shooting at ME!

(Player ABC dies)

(Player G runs to the bomb site to defuse)

Player G: Defusing!

(Player G is shot because the bomb site is being observed by the attackers)

(The remaining players now search for the attackers and the bomb site is blown up because the defenders lost track of time)

OR:

(The remaining defenders kill the attackers because the attackers are in predictable locations and defuse the bomb in time)

_______

The entire team: They're going A

(A defenders wait for the A attackers to arrive)

(B defenders goes into a flanking fire position leading to A, or come up behind them.)

(Sporadic, yet helpful comms from players to their team or other individuals)

(The attackers are then killed)

The last scenario is a perfect world scenario.