Nortel Meridian 1 Option 11C, Administration And Maintenance

Page: 267 / 507

Chapter 6 — ISDN BRI trunk implementation Page 253 of 492
Option 11C ISDN BRI Administration and Maintenance
Clock synchronization may be achieved by having the Meridian 1 Option 11,
equipped with the SILC, derive clock reference from the BRI TIE trunk
connection or from other PRI/DTI/BRI connections if available. The
Meridian 1 equipped with the UILC interface may be allowed to operate in
free-run mode or derive the clock source from other PRI/DTI/BRI
connections if available.
Figure 40
ISDN BRI TIE trunk connectivity — second configuration (supported in North America when
both switches are Option 11)
553-7860.EPS
Non ISDN BRI
Line Card
Option 11
(USR)
Option 11
(NET)
UILC
Non ISDN BRI
Line Card
NT1
Clock
Controller
S/T
S/T
Maximum
1 Km (3280 ft)
Maximum
5 Km (16400 ft)
S/T U
U
ISDN/BRI
terminal ISDN/BRI
terminal
Slave
Clock
Controller
FR/TR
DTI/PRI DTI/PRI
Non ISDN BRI device
such as 2500 or digital
type telephone
Note 4
NT1
Note 3
Note 1
Note 1
Note 1
Note 2
Note 2
Note 3
Note 4
N T
T E
SILC
Note 3
T E
N T
USR and NET define the response for the SIDE prompt in Overlay 16.
Free running (FR) or Tracking (TR) mode.
NT and TE defines the response for the MODE prompt in Overlay 27.
In-circuit protection against power line crosses or lightning is not provided on the SILC card.
When the SILC line card is used in TIE trunk applications in which the cabling is exposed to
the outside plant conditions, an NT1 module certified for such applications must be used.
Check local regulations before providing such service.