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SCP-FRC754-042-03H
Table 7.
Circuit Conditions When a Subscriber Initiates an Outgoing Call (Ground Start)
Operation
Subscriber requests
dialtone
CO returns dialtone
Subscriber Dials
FLC-704 List 4B
CO Switch
FLC-704 COCU
⇐
Ring - ground
On-hook
⇒
Tip - ground
Dialtone
⇐
Ring - no ground
Off-hook
DP or DTMF
January 6, 2003
FRC-754
Subscriber
RTCU
⇐
Ring - ground
On-hook
⇒
Tip - ground
Dialtone
⇐
Ring - no ground
Off-hook
DP or DTMF
Circuit Operation
7
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