ELSA MicroLink ISDN/TL V34¶

This is a rather high-end ISDN terminal adapter from 1995. It combines an ISDN terminal adapter with a built-in V.34 capable analog modem, so both ISDN data calls as well as analog modem calls are possible.

Manual

• ELSA_MicroLink_ISDN_TLV.34-users-manual.pdf

Supply Voltage	9V AC
Power Consumption	~5.9W
RS232 Connector	DB25
Line Connector	RJ-11 (unusual for ISDN)

Hardware¶

The hardware design is a two-layer circhit board design:

• the bottom circuit hoststhe pure ISDN TA
• the daughterboard contains the V.34 analog modem using a Rockwell L39W/U + RCV288DPi chipset

Mainboard¶

• Siemens PSB 2186N V1.1 ISAC-S TE
  • 7.68 MHz XTAL
• Siemens SAB 82526N HSCX-1 V2.1 High-Level Serial Communications Controller Extended HSCX.pdf
• NEC D70236AGD-16 V53A 16-bit microprocessor D70236AGD.pdf
  • 29.4912 MHz XTAL
• ST M28C64C-20K1 64K x8 EEPROM M28C64C-STMicroelectronics.pdf
• Siemens PSB 2110N ITAC V2.3 IOM-2
  • 10.75 MHz XTAL
• NEC D72002-11 Serial Communications Controller DSA2IH00126121.pdf
• Sony K1202Q
• AT29C020 Flash EEPROM
  • dump: elsa_ml_isdn_tl_v34.bin

Daughterboard¶

• Rockwell L39W/U L3903-53
• Rockwell RCV288DPi R6682-24
• UMC "UM61256FS-15" 32Kx8 CMOS SRAM DSA2IH00219003.pdf
• 20.2752 MHz XTAL
• 40.320 MHz XTAL
• Siemens PSB2165N ARCOFI SP1.1
• Speaker
• IS27C010 EEPROM
  • image of v1.23: elsa_ml_336_pcqv_v1_23.bin

EEPROM images¶

• elsa_ml_isdn_tl_v34.bin
• elsa_ml_336_pcqv_v1_23.bin

AT-commands¶

information¶

ATI5
0326.808.543 K 00016

OK
ATI6
MicroLink ISDN/TLV.34 Rel. K

OK
ATI9
(#ELS0326\00808543\MODEM\TIA0602,TIA0578,TIA0592\MicroLink ISDN/TLV.3400)

important commands¶

# set outgoing MSN
AT+ICLI=5210
AT+ICLI?

# set accepted MSNs
AT+IMSN0=5210
AT+IMSN1=5211
AT+IMSN?

# set B-channel protocol (see table below for possible values)
AT\Nx

B-channel table

0	V.110 normal
1	V.110 direct
2	X.75
3	X.75 (with V.110 fallback)
4	V.120
5	V.110 (with V.110 fallback)
6	X.75 or V.120 incoming, X.75 outgoing
7	X.75 or V.120 incoming, X.75 outgoing (with V.110 fallback)
8	X.75-T-Online (VT-100)
9	X.75-T-Online (CEPT/KIT)
10	HDLC transparent