Specifications
25 User’s Manual - SM202T/SMV23 Modem
Weight:
0.5 lbs without AC to DC power converter module
Interface connectors
Leased Line:
4-position RJ-11C modular Jack
Data Terminal Equipment:
DB-9 female connector (for RS-232)
RJ-11C module jack (for RS-485)
Interface Connector Pin Assignments
Table B-1. Leased Line RJ-11C Pin Assignments
This Pin Number… Corresponds to This Signal…
1 Not Uesd
2
Rx
3
Tx (Tx/Rx)
4
Tx (Tx/Rx)
5
Rx
6 Not Used
NOTE:
When 2-wire half-duplex is used, the TX pair must be used for both transmit
and receive.
Figure 2-8. Back-to-Back Connection to a Second Modem
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