D-channel daughterboards
41
•
Safety: UL 60950 3rd edition/ CAN/ CSA
•
Size: W = 65 mm, L = 250 mm, H = 40 mm
D-channel daughterboards
Up to four optional D-channel (DCH) daughterboards can be used in the
PRI Gateway. Two of them can be connected to the upper side and the
other two to the lower side.
The PRI Gateway supports both downloadable D-channel (DDCH)
daughterboards (NTBK51AA/NTBK51CA) and D-channel interface (DCHI)
daughterboards (NTAK93AB).
The PRI Gateway uses only the NTBK51AA/NTBK51CA DDCH
daughterboards that supports two DCH interfaces (to serve two E1/T1
spans).
The NTAK93AB DCHI daughterboard supports only one DCH interface
(serves only one E1 span) and is used only for DPNSS/DASS signaling.
D-channel interface allocation and usage
The PRI Gateway allows flexible D-channel configuration as follows:
•
pure DDCH daughterboard using only port 1
•
pure DDCH daughterboard using only port 0 and 1
•
pure DCHI daughterboard using port 1
•
pure onboard DPNSS/DASS
•
mixed configuration including both DDCH and DCHI
If one DCH interface is used for more than one span (not applicable for the
DCHI daughterboard), fewer DDCH daughterboards can be used.
The PRI Gateway uses a fixed allocation map for DCH daughterboards
and E1/T1 span numbering. The following rules apply to D-channel
interface usage:
•
DDCH interfaces (using both ports 0 and 1) can be defined and
associated with E1/T1 spans based on the following mapping rules:
—
the upper left daughterboard (ports 0 and 1) is physically mapped
to spans 1 and 2 of the PRI Gateway (MGC Intelligent Peripheral
Nortel Communication Server 1000
Media Gateway 1000E PRI Gateway Installation and Commissioning
NN43041-311 04.01
4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
.
Содержание 1000E PRI
Страница 161: ......
