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SZU CHI CHEN
Beginner

help!do any one know NEC IPS 2000 disconnect(ON/OFF) frequency,

Dear all expert

i have a cisco 1760 with FXO interface connect NEC NEAX IPS 2000 ,when i hang my phone,it won't disconnect,

i have found some can't disconect issue with FXO interface in forum,but do not have NEC NEAX 2000 example,pls kindly support

tks again

2 REPLIES 2
ebreniz
Frequent Contributor

When loop-start signaling is used, a router's FXO interface looks like a phone to the switch (private branch exchange (PBX), public switched telephone network (PSTN), Key-System) it connects to. The FXO interface closes the loop to indicate off-hook. The switch always provides a battery so there is no disconnect supervision from the switch side. Since a switch expects a phone user (example of an FXO interface) to hang up the phone when the call is terminated (on either side), it also expects the FXO port on the router to hang-up. This "human intervention" is not built into the router. The FXO port expects the switch to tell it when to hang-up (or remove the battery to indicate on-hook). Because of this, there is no guarantee that a near-end or far-end FXO port disconnects the call once either end of the call hangs-up.

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