255-700-447
D-15
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Appendix D PSAX Module Features
DS3, E3, and STS-1e Interface Modules
1-Port Channelized STS-1e, T1 Module (23N62)
The 1-Port Channelized STS-1e, T1 Format module provides one physical
port with a line rate of 51.84 Mbps. The physical port is divided (channel-
ized) into 28 virtual DS1 ports. Each virtual DS1 port can be configured as a
structured port and channelized into 24 individual DS0s, providing a total of
672 channels. Each virtual DS1 port can also be configured as a single struc-
tured or unstructured channel. The 1-Port Channelized STS-1e, T1 Format
module provides the following interfaces:
The user can configure this module to provide n X 64 Kbps (fractional DS1)
structured circuit emulation service. When configured for DS1 circuit emula-
tion service, the module interfaces with TDM channelized DS1 circuits. It
converts the channelized digital signals (usually voice data) to ATM virtual
channels. Signaling bit transport is also provided, using ATM Forum stan-
dards for channel-associated signaling (CAS). This module can connect to a
device using 56 Kbps or 64 Kbps for service transport, with 8 Kbps for
robbed-bit signaling per DS0. With the 64 Kbps “clear channel” capability,
this module can connect to a device using ISDN primary rate interface (PRI)
service. Because this structured circuit-emulation service can be configured
to use only a fraction of the time slots, the user can configure several inde-
pendent emulated circuits to share one service interface.
The 1-Port Channelized STS-1e, T1 Format module uses ATM Forum specifi-
cations UNI 3.0 or UNI 3.1, which allow any DS1 port to act as a user net-
work interface (UNI), or an interim interswitch protocol (IISP) user or IISP
network interface to an ATM network.
Software Features
The following services are supported:
•
Circuit emulation service (CES) with unstructured and structured DS1 sig-
nal transport
•
N X 64 kbps circuit emulation service (1 = N = 24)
•
Primary ISDN service with optional HDLC pass-through mode for the
D-channel
•
Channel-associated signaling (CAS)
•
Multiservices:
~
ATM: ATM UNI 3.0 and 3.1; Interim inter-switch signaling protocol
(IISP) user, IISP network, ILMI, PNNI
~
CE: Circuit emulation service (CES) with ISDN PRI using 64 Kbps clear
channel; 1 X 56 Kbps structured CAS; unstructured CES
•
ATM IISP (network/user)
•
Frame relay (UNI, NNI)
•
ATM PNNI 1.0
•
GR-303
•
ATM UNI 3.0, 3.1, and 4.0
•
HDLC pass-through
•
CAS trunkline
•
PRI ISDN (network/userP
•
Circuit emulation