Nortel 1000 Installation And Commissioning Manual page 182

182 ISL installation
Figure 69
MSDL/ISL settings
Shared mode
In shared mode, the D-channel is provided by the DCHI or MSDL card and
PRI. The hardware configuration is basically the same as the ISDN PRI
D-channel. See
Shared mode is established through service change in LD17, prompt USR,
with the response SHA.
In the shared mode, the DCH can share signaling for no more than 382 (T1)
or 480 (E1) trunks, including digital and analog.
Copyright © 2003-2007, Nortel Networks
.
Figure 70 "ISL in shared mode" (page
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
183).