Port format, Port rate – Verilink PRISM 41TDM (34-00275.4) Product Manual User Manual

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HAPTER

4: T

ERMINAL

NTERFACE

Port Format

When operating in the DDS-I or DDS-II modes, the DTE interface is always
synchronous. When set to the TXP-I or TXP-II modes, the 41TDM DTE interface
can operate as synchronous or asynchronous. When a unit is configured for
asynchronous DTE data, it operates in the TxPORT proprietary mode and requires
another 41TDM or a PRISM 3030/3060 with a DSU-MP on the remote end. The
supported asynchronous DTE rates are listed in Table 4-5. The following
parameters must be set for asynchronous operation: the number of async bits per
character is 8, the number of stop bits is 2, and parity is none

Table 4-5 shows the

data rates for ports A and B.

Port Rate

Selects the DTE interface line rate. The choices are 2.4, 4.8, 9.6, 19.2, 31.2, 38.4,
52, 56, 57.6, 60, and 64 kbps. The available rates depend on the port, net mode,
DTE mode, and the DTE format.

DSR

Data Set Ready is output from the unit to the DTE. Its behavior can be set to
TEST>OFF where DSR is On except when the unit is in test or set to Forced On
all the time regardless of any unit condition.

DCD

Data Carrier Detect is output from the unit to the DTE. Its behavior can be set to
one of the following.

Idle>Off - DCD is On except when the unit is receiving an idle, OOS, or OOF
code or an LOS.

Force On - DCD is on all the time regardless of any unit condition.

Table 4-5 Data Rates

DDS Mode

DTE Mode

Format

Data Rates

DDS-I

NON-TDM

sync

56K

DDS-II

NON-TDM

sync

64K

TXP-I

NON-TDM

async

sync

2.4K, 4.8K, 9.6K, 19.2K, 38.4K, 52K, 57.6K

2.4K, 4.8K, 9.6K, 19.2K, 38.4K, 52K

TDM

async

sync

2.4K, 4.8K, 9.6K, 19.2K, 31.2K

TXP-II

NON-TDM

async

sync

2.4K, 4.8K, 9.6K, 19.2K, 38.4K, 56K, 57.6K, 60K

2.4K, 4.8K, 9.6K, 19.2K, 38.4K, 56K, 60K

TDM

async

sync

2.4K, 4.8K, 9.6K, 19.2K, 38.4K

* Only one port (A or B) can be set to the highest rate at any given time. For example, if

Port A is set to the highest rate, Port B can be set no higher than the next highest rate.