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61Chapter 8 - The E1 and T1 Interfaces, With Signaling
Cyclades-PR4000
The general ISDN options are explained first.
ISDN General Menu CONFIG=>INTERFACE=>T1/E1(ISDN-PRI)=>ISDN
Parameter Description
Main Phone # Principal phone number assigned to the ISDN trunk line. Leave this parameter blank if this
number should not be confirmed by the router. This is recommended when the provider
does not send the trunk line number in the incoming call message.
Idle Timeout Time, in minutes, for the connection to time out if there is no traffic. For this to work, any
status messages, like PPP's LCP Echo Requests, must be disabled. The value 0 disables
the timeout function.
T200 Data-layer timer. When the router sends a command, this timer determines how long it
should wait for a response.
N200 Data-layer number of re-tries. When the T200 period passes without a response, the
command is re-sent up to N200 times.
T203 When no messages are received for T203 seconds, an enquiry (RR or RNR) is sent.
At the end of this parameter list appears the menu for the dial-out table. It can also be reached by using the
<ESC> key at any time during the parameter list.
Each entry is an association between a channel and the IP Address and Phone number at the other end of the
connection. The router uses the IP information stored here in its routing table. When a packet arrives at the
router, and the IP is listed in the dial-out table, the router will attempt a connection on the slot indicated using the
associated phone number. The parameters for each entry are given next.
Add Entry Menu CONFIG =>INTERFACE =>T1/E1(ISDN-PRI)= >ISDN =><ESC> =>ADD ENTRY
Parameter Description
Destination IP
Address
IP Address assigned to the remote connection.
Destination
Phone #
Phone number assigned to the remote connection
Slot N Channel # Channel used to reach this destination.