Campbell Scientific COM220 56k Phone Modem - Manual (Page 12)

COM220 Telephone Modem
TABLE 3-1. Dataloggers that Require Direct
12-Vdc Connection to COM220
CR10(X) with silver wiring panel
CR10(X) with black CR10 wiring panel (pn 8032)
21X(L) — serial number 13,442 or lower
CR500  serial number 1764 or lower
CR7, CR700X — serial number 2778 or lower
FIGURE 3-1. CR1000 and COM220 using remote telephone line
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