255-700-447
D-7
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Appendix D PSAX Module Features
DS1/T1 Interface Modules
Hardware Features
The 12-Port Medium-Density DS1 IMA module provides the following hard-
ware features:
•
Number of ports: 12
•
Connector type: one Mini-Champ connector that mates with the AMP
cable #1324936-1
•
Line rate: 1.544 Mbps
•
Physical interfaces supported: ITU-T G.703, ITU-T G.704
•
Line encoding mode: B8ZS (default), AMI
•
Loopback capabilities: line loopback, local loopback
•
Line buildout: Up to 133, 266, 399, 533, and 655 feet
•
Framing mode: ESF (default), D4
12-Port Medium-Density DS1 Multiservice Module (23N64)
The 12-Port Medium-Density DS1 Multiservice module provides a line rate
of 1.544 Mbps per port. Each port can be independently configured to pro-
vide for channelized and unchannelized frame relay configurations, circuit
emulation service (CES), high-level data link control (HDLC) pass-through
mode, integrated services digital network with a primary rate interface (ISDN
PRI) service, and ATM services.
You can configure the 12-Port Medium-Density DS1 Multiservice module to
provide N x 64 Kbps (fractional T1) structured circuit emulation service.
When configured for DS1 circuit emulation service, the module interfaces
with TDM channelized DS1 circuits. It converts channelized data (usually
voice data) to ATM virtual channels. By using structured (channelized) cir-
cuit emulation, this module can adapt a maximum of 24 DS1channels per
port to ATM virtual channels with individual virtual path identifiers (VPIs)
and virtual channel identifiers (VCIs). Signaling bit transport is also pro-
vided, based on ATM Forum standards for channel-associated signalling
(CAS). With the 64 Kbps "clear channel" capability, this module can connect
to a device using an ISDN PRI service. Because this structured circuit emula-
tion service can be configured to use only a fraction of the time slots, you can
configure several independent emulated circuits to share one service inter-
face.
The 12-Port Medium-Density DS1 Multiservice module uses ATM Forum
Specification UNI 3.0 or UNI 3.1, which allows any DS1 port to act as a user
network interface (UNI), an interim inter-switch protocol (IISP) user or net-
work interface to an ATM network.
Software Features
The 12-Port Medium-Density DS1 Multiservice module supports the follow-
ing services:
•
ATM: ATM UNI 3.0, 3.1, and 4.0; Interim inter-switch signaling protocol
(IISP) user, IISP network; PNNI 1.0, all with traffic shaping
•
CE: Circuit emulation service (CES) with ISDN PRI using 64 Kbps clear
channel; 1 x 64 Kbps structured CAS; unstructured CES
•
HDLC passthrough mode (N x 56 and N x 64)
•
Frame relay UNI and NNI (FRF.1, FRF.2, FRF.5, and FRF.8)