Here are the basics of what you will normaill hear:
Unit Numbers:
first, 30s are West Shore
20s are Center District
Single Digits are Allingtown District
Signals:
99 (copy)
60 (responding)
61(report to/contact)
63(back in service)
65 (on scene)
67 (transport to hospital)
72 (fire, under control, no addl help needed, minor)
73 (working fire)
74 (false alarm)
22 (call second alarm)
23 (call third alarm) and so on...