Refurbished Phone System Expansion Modules
A phone system expansion module is a unit that adds extension or line ports to a telephone system beyond what the control unit holds on its own. You add one when you run out of ports or need a different port type. This range covers refurbished expansion modules from Avaya, Nortel, Mitel, BT Business, Panasonic and Siemens, part of our telephone systems range.
Common examples are the Avaya IP Office DS16 and DS30 digital station modules, the Avaya Phone 8, 16 and 30 analogue modules, Nortel BCM modules such as the DSM32+ and ASM8+, and the Mitel ASU II. For cards that fit inside the control unit, see system cards.
Showing 1–12 of 51 resultsSorted by popularity
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AVAYA IP500 DIGITAL STATION 30B
£45.00 £37.50 Ex. VAT -
Nortel Media Gateway 1000 (MG 1000) Chassis Expander
£32.00 £26.67 Ex. VAT -
Avaya DS30
£249.50 £207.92 Ex. VAT -
AVAYA IP400 TELEPHONE 8 V2 EXPANSION MODULE
£45.00 £37.50 Ex. VAT -
Avaya DS16 B
£299.50 £249.58 Ex. VAT -
NORTEL NORSTAR M0X8A ANALOGUE EXPANSION MODULE
£46.00 £38.33 Ex. VAT -
Avaya DS30 B
£304.87 £254.06 Ex. VAT -
Avaya PHONE 30 Module
£300.00 £250.00 Ex. VAT -
SIEMENS S30817-Q902-B401-2 EXM EXTERNAL MUSIC ON HOLD
£32.00 £26.67 Ex. VAT -
NORTEL M12XO TRUNK MODULE
£46.00 £38.33 Ex. VAT -
NORTEL BCM 50 EXPANSION UNIT
£46.00 £38.33 Ex. VAT -
AVAYA BCM 50 EXPANSION UNIT
£64.80 £54.00 Ex. VAT
How to choose an expansion module
Match your control unit
Expansion modules work only with their own system family, and sometimes only one generation. Avaya, for example, made separate IP400 and IP500 versions of its Phone and digital station modules. Read the model on your control unit before you order.
Digital or analogue ports
Digital station modules, such as the Avaya DS30 or Nortel DSM16+, run the maker's digital system phones. Analogue modules, such as the Avaya Phone 30 or Nortel ASM8+, run single-line phones, fax machines and door entry units.
Check the version and connector
Many modules come in versions, such as V1 and V2 on the Avaya IP400 modules or A and B on the IP500 DS30. Versions can differ in connector and supported phones. The DS30A, for example, uses RJ21 connectors.
Count your expansion ports
Each control unit supports a limited number of expansion modules. Count the modules you already have and check your control unit's limit before you add another. If a module has failed, our repair service may be an option.
Line modules
Some modules add outside lines, such as the Nortel BCM ISDN2 BRI 4 port S/T module, the BT Versatility ISDN2 Digital Line Module or the Mitel 3300 Universal NSU. Check your line type first, since UK ISDN is being withdrawn.
Expansion modules by system family
| System family | Modules listed | What they add |
|---|---|---|
| Avaya IP Office | DS16, DS30 (incl. A and B versions) | Digital extensions |
| Avaya IP Office (IP400, IP500) | Phone 8, Phone 16, Phone 30 | Analogue extensions |
| Nortel BCM | DSM16+, DSM32+ | Digital extensions |
| Nortel BCM | ASM8+, GASM8 | Analogue extensions |
| Nortel BCM | ISDN2 BRI 4 port S/T module | ISDN2 (BRI) ports |
| Mitel 3300 | ASU II | Analogue extensions and lines |
| Mitel 3300 | Universal NSU | Digital trunks (E1/T1) |
| Panasonic KX-TDE600 | KX-TDE620 Expansion Shelf | Extra card slots |
Questions
What is an expansion module on a phone system?
An expansion module adds extension or line ports to a telephone system beyond what the control unit holds. Most connect to the control unit by cable and run as part of the same system. You add one when you need more phones or a different type of port.
What is the Avaya DS16?
The Avaya DS16 is a 16-port digital station expansion module for Avaya IP Office. It adds 16 ports for Avaya digital phones. It comes in several versions, such as the IP500 DS16 B, so match the version to your control unit and phones.
What is the difference between the Avaya DS16 and DS30?
The number of ports. The DS16 adds 16 digital extension ports and the DS30 adds 30. Both come in versions with different connectors and supported phones, such as the IP500 DS30A with RJ21 connectors and the DS30 B.
Which Avaya expansion module do I need?
It depends on your phones and your control unit. Choose a DS module for Avaya digital phones and a Phone module for analogue phones, then the IP400 or IP500 version that matches your control unit. If you are unsure, send your control unit model through the quote form.
Is a phone expansion module the same as a button module?
No. A system expansion module adds ports to the telephone system. A button module, which some makers also call an expansion module, clips onto a desk phone and adds programmable keys. You will find those under button modules.
Need a model that is not listed?
Send us the model numbers and quantities you need. We will reply with what we can supply.
Request a quote- Delivery: free next-day delivery to UK mainland addresses on in-stock items ordered by 3pm.
- Returns: within 14 days, see delivery information.
- Replacing old equipment? We buy used phones and systems and repair phones.
Buying refurbished phones and phone system hardware helps to reduce your impact on the environment, using less resources and reducing landfill. We can also recycle your old desk phones, back into the supply chain. Contact our team today and find out what help we can provide with your office telephones.