1 Exhibit 10.12(c) AMENDMENT TO INTERCONNECTION AGREEMENT MERCURY COMMUNICATIONS LIMITED and NYNEX CABLECOMMS LIMITED 11 FEBRUARY 1997 2 AMENDMENT TO INTERCONNECTION AGREEMENT THIS AGREEMENT is made the eleventh day of February 1997 between: (I) MERCURY COMMUNICATIONS LIMITED whose registered office is at New Mercury House, 26 Red Lion Square, London WC1R 4HQ whose registered number is 1541957 ("Mercury") and (II) NYNEX CABLECOMMS LIMITED whose registered office is at The Tolworth Tower, Ewell Road, Surbiton, Surrey KT6 7ED whose registered number is 2664006 acting for and on behalf of itself and as agent for and on behalf of each of the franchise companies specified in Part 1 of Appendix Z to the Interconnection Agreement (as defined below) (collectively "NYNEX"). WHEREAS A. Mercury and Nynex have entered into an Interconnection Agreement dated 11th November 1996 (referred to herein as "the Interconnection Agreement"). B. Mercury and Nynex have agreed to modify the Interconnection Agreement in accordance with the terms of this Agreement. IT IS HEREBY AGREED as follows: 1. INTERPRETATION 1.1 This Agreement amends the Interconnection Agreement, and the terms of this Agreement shall be incorporated into the Interconnection Agreement. 1.2 Words and expressions defined in Schedule 1 of the Interconnection Agreement shall have the same meaning in this Agreement. 1.3 In this Agreement the following words and expression shall have the following meanings: "BT Matrix" means the first version of the de-averaged EBC Matrix Build 007 published by BT and to be used with effect from 1st October 1996; "Cellnet/Vodafone Direct Dial Mobile Numbers" means those access numbers specified in Schedule 2 of this Agreement and any other numbers which Cellnet or Vodafone may introduce during the Discount Period for the purpose of direct dial access to their mobile customers; "Discount Period" means 13th November 1996 to 31st March 1997; 3 "National Double Tandem Calls" means all Transit National Calls listed as double plus tandem calls falling within banks 527, 528 and 529 of the BT Matrix; "Rebate" means the rebate payable in accordance with Clause 3. 2. NYNEX OBLIGATIONS 2.1 Nynex undertakes during the Discount Period to convey all Calls in the categories listed below which originate on the Nynex System to the Mercury System. The categories are: a) National Double Tandem Calls; b) International Calls; c) Calls addressed to Cellnet/Vodafone Direct Dial Mobile Numbers 2.2 Nynex will endeavor to convey to the Mercury system at least the minimum volumes of Calls specified in Schedule 1. 2.3 Nynex will supply Mercury on reasonable written request with information, data and statistics relating to Calls of the types specified in Clause 2.1 of this Agreement, sufficient to show that Nynex is complying with its obligations hereunder. 3. REBATE 3.1 Provided Nynex complies with Clause 2 hereof during the whole of the Discount Period Mercury shall pay a Rebate to Nynex equivalent to 15% of all charges due from Nynex to Mercury in respect of International Calls during the Discount Period. 3.2 In the event that Nynex fails to achieve the minimum volumes specified in Clause 2.2, Nynex shall nevertheless be entitled to the Rebate in accordance with this Clause 3, provided that Mercury is reasonably satisfied that Nynex has complied with Clause 2.1 hereof for the whole of the Discount Period. 3.3 The Rebate shall be calculated by Mercury and, subject to Nynex's agreement, paid by way of a credit against the next invoice issued by Mercury to Nynex under the Interconnection Agreement following the end of the Discount Period. 3.4 Should there be a dispute as to the rebated amount, the relevant procedures in the Interconnection Agreement shall apply. 4 3.5 The Interconnection Agreement shall continue in full effect except as expressly varied hereby. 4. TERMINATION 4.1 This Agreement shall terminate automatically upon receipt in full by Nynex of the Rebate or if the Interconnection Agreement is terminated for any reason. 4.2 Both parties reserve the right to terminate this Agreement forthwith by notice in writing if the other party commits a breach of any of its obligations under this Agreement. 4.3 Nynex may terminate this Agreement by notice in writing at any time prior to the end of the Discount Period. 4.4 Where this Agreement is terminated as a result of a breach by Nynex or by notice from Nynex under Clause 4.3 prior to the end of the Discount Period no Rebate or any part thereof shall be payable. 4.5 Where this Agreement is terminated as a result of a breach by Mercury the Rebate shall be payable in respect of the period up to termination but not thereafter. 4.6 Expiry or termination of this Agreement shall not serve to terminate the Interconnection Agreement. 5. ENTIRE AGREEMENT This Agreement together with the Interconnection Agreement constitutes the entire understanding between the parties in relation to their obligations and the availability of the Rebate hereunder, and shall supersede and replace all previous agreements, understandings or commitments between the Parties or representations made by either Party whether oral or written with respect to such matters. AS WITNESS the hands of the duly authorized representatives of the Parties at the date first above written ) Ian Ashby, Managing Director of Partner Services for /s/ IAN F. ASHBY ) and on behalf of Mercury Communications Limited ) ) Paul Repp, Executive Director; Chief Legal and ) Regulatory Officer and Company Secretary for and on ) behalf of NYNEX CableComms Limited and as agent /s/ PAUL REPP ) for and on behalf of the 16 franchise) companies ) specified in Part 1 of Appendix 2 to the Interconnection ) Agreement 5 SCHEDULE 1 International Actual traffic 1/11/96-31/3/96 - - ------------- 1/10/96 1/10/96 August 96 Traffic Projection Country Std Econ Total (kmins) Total (kmins) - - ------------- ------- ------- -------------- ------------------ Australia 16.75 14.75 126 690 Austria 16.75 14.95 13 69 Belgium 14.85 14.05 36 198 Canada 7.95 7.95 109 600 China 60.42 57.69 2 13 Denmark 12.95 12.95 26 142 Egypt 48.95 48.95 7 38 France 11.95 9.75 212 1166 Germany 12.30 11.85 200 1099 Gibraltar 17.35 14.46 1 6 Greece 20.00 18.71 32 178 Guyana 56.21 54.71 20 108 Hong Kong 21.50 21.50 31 172 India 40.95 39.95 37 203 Indonesia 47.75 47.75 4 20 Iran 55.95 54.00 9 48 Irish Republic 10.40 7.15 288 1585 Israel 30.95 39.95 9 50 Italy 17.00 15.85 71 389 Japan 19.95 19.95 10 57 Malaysia 35.50 35.50 14 77 Netherlands 13.05 11.75 76 420 New Zealand 20.45 18.95 43 238 Norway 13.45 11.95 17 94 Poland 18.10 15.20 14 75 Portugal 18.10 16.20 37 206 Russia 39.95 39.95 9 51 Saudi Arabia 51.50 45.30 17 92 South Africa 35.00 35.00 41 226 Spain 18.00 16.20 151 830 Sweden 12.85 10.85 33 184 Switzerland 11.95 10.05 33 182 Taiwan 43.00 43.00 5 30 Thailand 49.95 49.95 10 55 Turkey 23.35 19.75 28 152 United Arab 39.95 37.35 13 72 Emirates USA 7.15 7.15 438 2407 - - ---------- UK National Target traffic for period: 137.5 million minutes Cellnet & Vodafone Mobile Target traffic for period: 8.34 million minutes 6 SCHEDULE 2 DIRECT DIAL NUMBERS ------------------- Numbers on the Vodafone Network: Dial code ranges: 0370, 0374, 0378, 0385, 0421, 0441, 0468, 0831 and 0836, excluding sub ranges 0374-5, 0385-6, 0421-1, 0836-0, 0836-1, 0836-4, 0836-8 and 0836-9. Numbers on the Cellnet Network: Dial code ranges: 0401, 0402, 0410, 0411, 0585, 0589, 0802, 0850 and 0860, excluding sub range 0401-5.