Comtech EF Data SDM-9220 - Manual (Page 100)

SDM-9220/9230 Hardware Installation Guide
5-22 Memotec Inc.
5.9.3 Dual Serial Port (WAN) Interface
Ordering part number: 161-1035-000
The dual serial port interface card (also referred to as the Dual SCC interface card)
provides the capacity to increase the number of serial ports on the SDM-9220/9230
according to data traffic needs. Only one slot on the SDM-9220 or SDM-9230 can be
loaded with a dual serial port interface card.
This interface card has the following characteristics:
• 2 universal serial ports per interface card, supporting V.35/V.11, TIA-232 (V.24),
X.21, X.21 CE, TIA-449 (V.36) and TIA-530 interfaces
• HD-26 female connectors that provide auto-detection of interface and gender
according to the type of HD-26 custom cable that is installed. For details, refer to
“Custom Serial Cable Specifications” on page 6-6 .
• Each port permits connection of a WAN/user line for data traffic
• Protocols supported: P-SDLC , S-SDLC , HDLC , PVCR , FR-NET , FR-USER ,
DDCMP , T-ASYNC , R-ASYNC , BSC , COP , PASSTHRU , synchronous and asyn-
chronous PPP , X25 and SP (available with SkyPerformer license only)
• Throughput speeds: 8 to 2048 Kbps, on both ports of the interface card
NOTE: A T1 or E1 interface card on an SDM-9220/9230 in ATM mode (license
required) does not use the same timeslots for data. The ATM option provides a
global parameter Number of data channels reserved, which defines the total
number of timeslots available for data transfer.
- The value of this parameter should be set according to the maximum through-
put speed required
- Divide this speed by the speed of one timeslot (64 Kbps) to determine how
many data channels should be reserved. Consult the NetPerformer Reference
Guides
for details.