User Guide
T1/E1 configuration guide
35
t2
This parameter is used to set the max interval time between INFO messages in
receiving overlap. If one INFO message is not followed by the next message
within the t2 time, digit information received up to the latest is regarded as
destination address.
MAX:/CONFIG/ISDN>change t2 <value>
t3xx
This parameter is used to set the value of the timer related to ISDN hierarchy
defined in ITU-T Q.931. For further details, refer to ITU-T Q.931
Recommendation.
MAX:/CONFIG/ISDN>change t303 <value>
MAX:/CONFIG/ISDN>change t304 <value>
… … … ..
MAX:/CONFIG/ISDN>change t310 <value>
cnpn, cdpn
This parameter is used to set numbering plan needed to use in case of sending
calling party number or called party number. For further details, refer to ITU-T
Q.931 Recommendation.
MAX:/CONFIG/ISDN>change cnpn <value>
MAX:/CONFIG/ISDN>change cdpn <value>
12.3.6. CAS
CAS is a signaling type used to send signaling information into information band.
CAS signaling is divided largely into line signaling and address signaling.
Line signaling indicates on-hook/off-hook status changes occurred in the network and
performs call setup, call connection monitoring and release operation.
Address signaling performs processing related caller-dialed number, that is, destination
number.
T1 line signaling :
CAS signaling means that instead of having a specific time slot(such as an ISDN D
channel in PRI) designated to provide signaling only, signaling bits are within the sixth,
