для Cisco Cisco IOS Software Releases 12.2 B

A new interface, D-channel, is introduced with the ISDN PRI-SLT feature for use specifically in VoIP 
applications, such as an SS7 Interconnect Voice Gateway that requires release of ISDN signaling time 
slots for RLM configurations.

A Cisco SLT is a key component of the Cisco SS7 Interconnect for Voice Gateways feature. In the 
Cisco SS7 Interconnect for Voice Gateways environment, the D channel will be on Ethernet, and the time 
slots on an E1 and T1 controller can be shared by other applications such as SS7.

This section contains the following tasks. Each task is identified as either required or optional.

 (optional)

To release the ISDN PRI signaling time slot for environments that require SS7-enabled VoIP applications 
to share all available time slots in a PRI group, use the following commands:

configure {terminal | memory | network}

controller {t1 | e1} controller-number

pri-group timeslots timeslot-range [nfas_d {backup | none | primary {nfas_int number | 
nfas_group number | rlm-group number}} | service]

channel-group channel-number timeslots range [speed {48 | 56 | 64}]

exit

interface Dchannel interface-number

isdn command parameter (use the commands listed in 

Table 1 on page 4

 to configure the ISDN 

interface)

exit