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CHAPTER 9: Data-Channel Configuration
91
Table 9-6. CCM and 6-Channel CEM (MX215C only)
Local Sync Channel Interface Configured to DTE
Multiserver DTE
Constant Controlled
Pin I/O Carrier Mode Carrier Mode Pin I/O Signal
4 I Off-to-On transition On-to-Off transition 4 O RTS
raises CTS. forces CTS off
5 O Set on after RTS goes on. Set off when RTS goes off. 5 I CTS
8 O Forced ON. Set on when Multiserver 8 I CD
has output data. Set off
when all data delivered.
22 O 2 seconds on/4 seconds off when start ring frame received 22 I RI
from remote unit. It is held off when stop ring frame is
received from remote unit or when DTR is on
(Bell 103 emulation).
20 I Send changed to remote unit as detected. DTR on holds 20 O DTR
RI off.
6 O Change as dictated by remote unit. 6 I DSR
25 I Send changes to remote unit as detected. 25 O BUSY
11 I Not used. Not used. 11 O Unassigned
15 O Not affected by carrier mode. 15 I TX Clock
17 O Not affected by carrier mode. 17 I RX Clock
18 I Not affected by carrier mode. 18 O External
RX Clock
24 I Not affected by carrier mode. 24 O External
TX Clock
Key: I = input; O = output