Appendix C Module Information
Module Connections
74
255-700-161
PacketStar
®
PSAX 2300 Multiservice Media Gateway Installation Guide
, Issue 4
Module Connections
The PSAX I/O module connections are listed in Table 30.
*
On all PSAX I/O modules, except the 4-Port Voice 2-Wire Office and the 8-Port Voice 2-Wire Station modules, the
I/O buffers carry 16,384 cells per megabyte. The PSAX server modules carry no cells on the I/O buffers. Any module
with 24 MB SDRAM can buffer only 16,384 packets, or approximately 682 packets per megabyte. Traffic on the 4-
Port Ethernet module is buffered packet by packet, not cell by cell.
†
Indicates the size of the output buffer followed by the maximum number of 64-byte cells in the output buffer.
‡
This column relates only to the speed at which the module communicates within the chassis. A high-speed module will
communicate at high speed (1.2 Gbps) in a chassis that has a high-speed bus (PSAX 4500 chassis). High-speed mod-
ules will communicate at 600 Mbps in any other chassis. Low-speed modules will always communicate at 600 Mbps
in any chassis.
§
The total SDRAM for this module includes 2 MB of SRAM.
¶
The value 24 MB refers to the maximum data buffer (input and output buffers combined).
**
The SDRAM listed only takes into account the memory associated with the upper layer processor. It does not take into
account the fastpath processor (firmware) or the hardware reassembly buffers.
Table 30. PSAX I/O Module Connectors
Module
Connector
DS1/T1 Interface Modules
20N33
6-Port DS1 IMA (
IMA DS1
)
6 ea. RJ-45
20N36
6-Port Enhanced DS1/T1 Multiservice (
DS1/T1
Enh
)
6 ea. RJ-45
23N33
12-Port Medium-Density DS1 IMA (
MD DS1
IMA
)
1 ea. 50-Pin Micro champ
23N35
24-Port High-Density DS1 Multiservice (
HD
DS1
)
2 ea. 50-Pin Micro champ
23N64
12-Port Medium-Density DS1 Multiservice
(
MD DS1
)
1 ea. 50-Pin Micro champ
23N69
8-Port HDSL-2
1 ea. 50-Pin Micro champ
24N64
12-Port Medium-Density DS1/E1/DS0A CES
(
MD DS1/E1/DS0A CES
)
1 ea. 50-Pin Micro champ
23N35
24-Port High-Density DS1/E1 Multiservice
(
HD DS1/E1 MS
)
2 ea. 50-Pin Micro champ
E1 Interface Modules
20N34
6-Port E1 IMA (
IMA E1
)
6 ea. RJ-45
20N56
6-Port Enhanced E1 Multiservice (
E1 Enh
)
6 ea. RJ-45
23N31
8-Port Medium-Density E1 Multiservice (
MD
E1 MS
)
1 ea. 50-Pin Micro champ
23N34
21-Port High-Density E1 IMA (
HD E1 IMA
)
2 ea. 50-Pin Micro champ
23N66
21-Port High-Density E1 Multiservice (
HD E1
) 2 ea. 50-Pin Micro champ
