Specifications

3GPP

3GPP TS 27.007 V6.3.0 (2003-

06)

Release 6

If a +CMUX command is issued whilst in any multiplexer mode then that +CMUX command shall be ignored and the

MT/TA shall return an +CME ERROR: <err> response.

Defined values

<operation> (multiplexer Transparency Mechanism)

0 Basic option

1 Advanced option

<subset>:

This parameter defines the way in which the multiplexer control channel is set up. A virtual channel may

subsequently be set up differently but in the absence of any negotiation for the settings of a virtual channel, the

virtual channel shall be set up according to the control channel <subset> setting.

0 UIH frames used only

1 UI frames used only

2 I frames used only

Default value: 0

<port_speed> (transmission rate):

1 9 600 bit/s

2 19 200 bit/s

3 38 400 bit/s

4 57 600 bit/s

5 115 200 bit/s

6 230 400 bits/s

<N1> (maximum frame size):

1- 32768

default Value : 31 (64 if Advanced option is used)

<T1> (acknowledgement timer in units of ten milliseconds):

1-255, where 10 is default (100 ms)

<N2> (maximum number of re-transmissions):

0-100, where 3 is default

<T2> (response timer for the multiplexer control channel in units of ten milliseconds):

2-255, where 30 is default (300 ms)

NOTE: T2 must be longer than T1.

<T3> (wake up response timer in seconds):

1-255, where 10 is default

<k> (window size, for Advanced operation with Error Recovery options):

1-7, where 2 is default

Implementation