Zhone Technologies 900 - Manual (Page 67)

Data Cards IMACS System Release 5.1.6 2-1
SRU Card Introduction
Chapter 2
SRU Card
2.1 Introduction
This chapter provides installation, configuration, and troubleshooting information for the
Subrate Data (SRU) Card, which is identified as an SRU 232*10 (822060), SRU 232*10 C&D
Bus (8221), SRU-422*4 (8224) and the SRU-LD*10 (8225) card on its faceplate ejector.
The SRU 232*10 Card allows you to connect up to 10 RS-232, low-speed and medium-speed
(300 kbps to 38.4 kbps) data terminals to the Integrated Access System. You can multiplex a
number of those devices onto a single DS0 time slot of a WAN card. The card ports can also
be multiplexed with voice traffic on an ADPCM engine.
Each port of the SRU 232*10 Card receives timing from either the external DTE or the
Integrated Access System clock. If the DTE supplies the transmit timing, that clock signal
must be synchronized to the Integrated Access System’s clock source.
The SRU-LD*10 Card allows you to connect up to ten (10) RS-232, low-speed and
medium-speed data terminal to the Integrated Access System. The functionality of the
SRU-LD*10 card is the same as the SRU 232*10 card with the exception of a lower delay
throughput.
Note: Some new changes to SRU Cards require that the cards be put in standby then the
active modes for the changes to take effect.
2.2 SRU Card Descriptions
2.2.1 SRU 232*10 Card Description (822060)
The SRU 232*10 Card supports published Digital Data Service (DDS) rates. Typical DDS
rates include 2.4, 4.8, 9.6, and 19.2 kbps. Up to ten 4.8 kbps DTE devices can be connected to
this card for placement on a single DS0 time slot of a T1 or E1 line. Or, the card can similarly
accommodate up to five 9.6 kbps devices.
You can also mix rates on the individual ports of an SRU 232*10 Card. Any combination of
rates can be used, up to an aggregate total bandwidth of kbps for the card. For example, you
can connect three 9.6 kbps terminals and one 19.2 kbps terminal to a single card. Other DTE
transmission rates supported by the card include 300 bps, 14.4 kbps, 28.8 kbps, and 38.4 kbps.