Configuring the Unit
5-23
3550-A2-GB20-40
July 1999
Table 5-10
MUX (Setup) Configuration Options
MUX Funct: Disab for MPTC; Enab for all other configurations
Next Enab Disab Prev
TDM/Flex Function. Enables or disables the TDM/Flex.
Enab
—
Select when you want to enable the TDM/Flex and perform multiplexing.
Disab
—
Select when you want to disable the TDM/Flex.
Share DevA: Enab for MPTT; Disab for all other configurations
Next Enab Disab Prev
Sharing Device A. Enabling this configuration option allows you to create a digital-sharing group. The following rules
apply:
•
All ports in a group must have the same port speed.
•
All ports must be adjacent.
•
A digital-sharing group can have 2 ports.
Enab
—
Select to enable the digital-sharing feature.
Disab
—
Select to disable the digital-sharing feature.
Port Cntrl: DSD for MPTT; Host for all other configurations
Next Host DSD Prev
Port Control. Specifies how to handle contention between the ports in a digital-sharing group.
Host
—
Select if the Host protocol must enforce the order of transmission to avoid collisions.
DSD
—
Select for Digital-Sharing Device if selection of the next port to transmit is based upon the
lowest-numbered port that is ready to transmit.
Table 5-11
(1 of 4)
MUX (Port) Configuration Options*
DTE Port: EIA232
Next EIA232 V.35 Prev
DTE Port. Selects the port data will be transmitted over.
EIA232 —
Select when using the EIA-232 interface/connector.
V.35
—
Select when using the V.35 interface/connector (a V.35 adapter must be used on Port 2).
Async
→
Sync: Disab
Next Enab Disab Prev
Asynchronous-to-Synchronous Conversion. Sets the port for asynchronous or synchronous operation.
Option Verification: When the TDM/Flex is enabled, the DSU verifies that the sum of the port speeds equals the
aggregate speed. The asynchronous setting
cannot be specified as underspeed.
Enab
—
Select to configure the port as asynchronous (asynchronous-to-synchronous conversion takes place).
Disab
—
Select to configure the port as synchronous.
* The menu paths for Prt1 and Prt2 are identical.
Summary of Contents for Comsphere 3551
Page 4: ...COMSPHERE 3550 Series Data Service Units C July 1999 3550 A2 GB20 40 Notices ...
Page 12: ...COMSPHERE 3550 Series Data Service Units vi July 1999 3550 A2 GB20 40 ...
Page 68: ...COMSPHERE 3550 Series Data Service Units 4 22 July 1999 3550 A2 GB20 40 ...
Page 98: ...COMSPHERE 3550 Series Data Service Units 5 30 July 1999 3550 A2 GB20 40 ...
Page 100: ...COMSPHERE 3550 Series Data Service Units A 2 July 1999 3550 A2 GB20 40 ...
Page 101: ...DSU Menu A 3 3550 A2 GB20 40 July 1999 ...
Page 108: ...COMSPHERE 3550 Series Data Service Units B 6 July 1999 3550 A2 GB20 40 ...
Page 122: ...COMSPHERE 3550 Series Data Service Units C 14 July 1999 3550 A2 GB20 40 ...
Page 129: ...Pin Assignments D 7 3550 A2 GB20 40 July 1999 Figure D 5 EIA 232 D Crossover Cable 4951 035F ...
Page 134: ...COMSPHERE 3550 Series Data Service Units E 4 July 1999 3550 A2 GB20 40 ...